Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/39—Organic or inorganic per-compounds
  • C11D3/3947—Liquid compositions
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
  • B08B9/08—Cleaning containers, e.g. tanks
  • B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
  • B08B9/22—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by soaking alone
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
  • C11D2111/10—Objects to be cleaned
  • C11D2111/14—Hard surfaces
  • C11D2111/20—Industrial or commercial equipment, e.g. reactors, tubes or engines
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
  • C11D2111/40—Specific cleaning or washing processes
  • C11D2111/44—Multi-step processes

Definitions

• the present invention relates to a method for pretreating a container and the method and device for cleaning a container.
• containers which are repeatedly usable are often utilized to contain products, such as beverage, beer, milk, yogurt and the like, for cost saving. These containers are often glass bottles or plastic bottles. Before filling any products, the repeatedly usable containers need to be cleaned.
• a cleaning method comprising steam and hot alkaline liquid is primarily adopted in the industries. This is a safe and automatic cleaning method, which has been extensively used in food, beverage, hygiene and pharmaceutical industries.
• the cleaning temperature used in this cleaning method is about 80 to about 90°C, and the cleaning rate is about 24,000 to about 40,000 bottles per hour.
• the present inventors have conducted comprehensive experiments and tests and finally found that: pretreating a container to be cleaned with a pretreatment solution comprising peroxide prior to cleaning of the container to be cleaned in an alkaline wash tank, and then conveying the pretreated container to an alkaline wash tank for cleaning, a comparable, or even better final cleaning effect can be achieved comparing with direct cleaning the container in the alkaline wash tank. Meanwhile, peroxide can be readily added, and the consumption of the peroxide can be well controlled, such that the overall cleaning cost is further decreased.
• a method for pretreating container which method comprises applying the container with a pretreatment solution comprising peroxide for pretreatment, and then conveying the pretreated container into an alkaline wash tank.
• the container is pretreated by peroxide before entering into an alkaline wash tank, the consumption of peroxide is well controlled, and the overall cleaning cost is further decreased, while excellent cleaning effect is achieved.
• a method for cleaning container which method comprises the following steps: a) applying a container to be cleaned with a pretreatment solution comprising peroxide for pretreatment; b) conveying the pretreated container into an alkaline wash tank, and cleaning the container with a cleaning solution in the alkaline wash tank.
• a device for cleaning container which device comprises i) a container pretreatment apparatus configured to apply a pretreatment solution comprising peroxide to a container to be cleaned; ii) a container cleaning apparatus comprising at least one alkaline wash tank, which is for receiving the pretreated container from the container pretreatment apparatus and cleaning the pretreated container with a cleaning solution, wherein the cleaning solution comprises a chelating agent and a surfactant, and the container pretreatment apparatus is connected to the container cleaning apparatus with a container transfer apparatus.
• the device for cleaning container of the present invention can be used to carry out the method for cleaning container of the present invention. Further, by using the device for cleaning container of the present invention, the charges in an alkaline wash tank of a cleaning system can be controlled, the consumption of peroxide is well controlled, and overall cleaning cost is further decreased, while excellent cleaning effect is achieved.
• a container pretreatment apparatus in even further aspect of the present invention, there is provided a container pretreatment apparatus.
• the container pretreatment apparatus of the present invention can be readily combined with various prior art cleaning systems, without complex modifications on the prior art cleaning systems, so that cost for installment is saved. Meanwhile, by using the container pretreatment apparatus of the present invention, the charges in an alkaline wash tank of a cleaning system can be reduced, the consumption of peroxide is well controlled, and overall cleaning cost is further decreased, while excellent cleaning effect is achieved.
• the term “about,” as used herein, refers to variation in the numerical quantity that can occur, for example, through typical measuring and liquid handling procedures used for making concentrates or use solutions in the real world; through inadvertent error in these procedures; through differences in the manufacture, source, or purity of the ingredients used to make the compositions or carry out the methods; and the like.
• the term “about” also encompasses amounts that differ due to different equilibrium conditions for a composition resulting from a particular initial mixture. Whether or not modified by the term "about,” the claims include equivalents to the quantities.
• pretreatment is intended to mean subjecting a container to a preliminary treatment before the container enters into any alkaline wash tank in a container cleaning apparatus.
• a “pretreatment,” “pretreating” or “pretreat” includes any pretreatment before the container enters into a container cleaning apparatus, and/or any pretreatment after the container enters into a container cleaning apparatus but before it enters into any alkaline wash tank in the container cleaning apparatus.
• the container cleaning apparatus comprises more than one alkaline wash tank
• the "pretreatment” of the present invention also includes the “pretreatment” conducted when the container is between any two adjacent alkaline wash tanks.
• a container cleaning apparatus generally may comprise at least one alkaline wash tank.
• a container cleaning apparatus may also comprise more alkaline wash tanks, such as two, three, etc., for more complete cleaning.
• Containers recycled from outside include soils. These soils comprise, but not limited to, label, mud, mold spot, oil and the like. For various reasons, soils present in a recycled container may cover a large area inside and outside the container.
• soils present in a recycled container may cover a large area inside and outside the container.
• peroxide is added in an alkaline cleaning solution in an alkaline wash tank. Although such a process lowers the cleaning temperature to a certain extent, and achieves a good cleaning effect, the addition amount of peroxide is difficult to control due to the easy decomposition of peroxide, resulting in an increase in overall cleaning cost. Attempts have been conducted to pretreating the container with an alkaline solution or water.
• a method for pretreating container comprises before conveying a container into an alkaline wash tank, applying a pretreatment solution comprising peroxide to the container for pretreatment.
• the container can be a glass container or a plastic container, such as a beer bottle, a beverage bottle and a milk bottle.
• the soils comprised in the container include, but are not limited to, label, mud, mold spot and the like.
• the duration for carrying out the pretreatment method of the present invention can be determined according to the level of soils on a container and the intended precleaning effect. It is generally about 3 to about 10 minutes, preferably about 5 to about 8 minutes.
• the pretreatment method of present invention is generally conducted at a normal pressure at a temperature range of about 50°C or lower, preferably at a temperature range of about 30 to about 45°C. Since the temperature at which the precleaning is conducted is relatively low, the energy consumed will be correspondingly low.
• peroxide has some oxidative properties.
• the inventors of the present invention have found that peroxide can chemically react with the soils on a container.
• peroxide can interact with some metal ions such as iron, manganese and copper and the like present in mold spot or mud. These metal ions function like a catalyst to facilitate the decomposition of peroxide into oxygen and water. Oxygen releases from the soils and forms many tiny bubbles. These bubbles can break the soils through mechanical power, so as to separate them from the container wall to be washed off. Further, peroxide can also oxidatively decompose the organics and mold spot through its own oxidative properties to separate the soil from container wall to be easily washed off.
• the peroxide used in the peroxide solution in the method of the present invention includes, but not limited to, sodium percarbonate, sodium perborate, peroacetic acid, peroctanoic acid, peroxy sulfonated oleic acid and hydrogen peroxide, and any mixture of them. Other peroxides well known to those skilled in the art can also be used.
• hydrogen peroxide is preferably used. Further, by using a hydrogen peroxide solution to clean, a container will not have any odor, which is suitable for food and beverage industries.
• the pretreatment solution of the present invention contains peroxide as the only active ingredient, and the peroxide is such as hydrogen peroxide.
• the concentration of the peroxide solution used in the method of the present invention is often less than 1 wt%.
• bubbles released from peroxide solution may fortify the generation of bubbles in a cleaning system.
• cleaning efficiency will be lowered because excess bubbles will make the contact between glass bottles and cleaning solution insufficient.
• excessive bubbles will also lead to an extended spray cleaning procedure that follows, and a risk of existence of residual cleaning solution.
• excessive bubbles may impair the cleaning effect.
• the concentration of the pretreatment solution comprising peroxide of the present invention can be about 0.2 to about lwt%, such as about 0.3 to about 0.5wt%.
• the pretreatment solution comprising peroxide of the present invention is formulated by solving peroxide in water.
• the water source for formulating the peroxide solution can be such as tap water, soft water, deionized water and the like. In view of the cost, tap water is preferred. Moreover, even tap water of very low cost, the excellent effects of the present invention can still be achieved.
• the pretreatment solution comprising peroxide of the present invention other agents in addition to peroxide can also be present, such as alkaline agent, disinfect agent, surfactant and the like. However, these other agents are only optional.
• the pretreatment solution comprising peroxide of the present invention contains only peroxide as active ingredient.
• the peroxide may be hydrogen peroxide.
• the alkaline wash tank used comprises alkaline cleaning solution.
• the alkaline cleaning solution comprises sodium hydroxide in an embodiment of the invention.
• the concentration of the alkaline cleaning solution may be between 1.5-3.5wt%.
• the container cleaning apparatus of the present invention comprises at least one alkaline wash tank.
• the container cleaning apparatus of the present invention comprises two alkaline wash tanks, one of which is primary alkaline wash tank, and the other is secondary alkaline wash tank, wherein the secondary alkaline wash tank is positioned downstream of the primary alkaline wash tank, and the two alkaline wash tank is connected by a container transfer apparatus.
• treatment temperature in alkaline wash tanks can be lowered to a range of about 40 to about 80°C, and more particularly, can be lowered to a range of about 60 to about 70°C.
• the alkaline solution used in the alkaline wash tank for container cleaning is not particularly limited, and can be those commonly used in container cleaning industry.
• alkaline solution mainly comprises alkali metal hydroxides, such as sodium hydroxide, and potassium hydroxide and the like, and alkali earth metal hydroxides, such as calcium hydroxides and the like.
• the alkaline solution may also comprises some additives for improving cleaning effect.
• the additives comprise, but not limited to, chelating agent, peroxide and surfactant, etc. These additives are all well known to those skilled in the art.
• the alkaline cleaning solution contained in the alkaline wash tank of the present invention can further comprises additives, such as a chelating agent, a peroxide and a surfactant.
• the chelating agent can be those known to a person skilled in the art.
• the chelating agent can be selected from, but not limited to, any one or more of the following: ethylenediamine tetraacetic acid tetrasodium, ethylenediamine tetraacetic acid disodium, glutamic acid diacetic acid tetrasodium, methylglycine diacetic acid, polymethacrylic acid, polymethacrylic acid sodium, aminotrimethylenephosphonic acid , hydroxyethylene diphosphonic acid, ethylenediamine tetramethylenephosphonic acid, diethylenetriamine pentmethylenephosphonic acid, 2-phosphonic acid butane- 1,2,4- tricarboxylic acid, polyol phosphonic acid ester, phosphonylhydroxyacetic acid, 1,6-
• the peroxide can be those used for precleaning the container to be cleaned.
• the peroxide comprises, but not limited to, sodium percarbonate, sodium perborate, peracetic acid, peroctanoic acid, peroxy sulfonated oleic acid and hydrogen peroxide, and any mixture of them.
• the surfactant can be a surfactant commonly used in the art. However, in the present invention, surfactant is optionally present.
• defoamers and surfactants that can be used in the present invention comprises, but not limited to, polyether-siliconepolymer, aliphatic alcohol polyoxyethylenepolyoxypropylene ether, ethylenediaminepolyoxyethylenepolyoxypropyleneether, and any mixture of them.
• the present amount of the chelating agent can be for example about 0.05 to about 0.5wt%
• the present amount of peroxide can be for example about 0.1 to about 0.5wt%
• the present amount of surfactant can be for example 0 to about 0.5wt%, wherein the above weight percents are all based on the alkaline cleaning solution.
• the amount of peroxide can be well controlled during the whole process.
• the amount of peroxide used in an alkaline wash tank can be at least reduced.
• the amount of peroxide used in an alkaline wash tank can be reduced to 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, or lower.
• the amount of peroxide used in an alkaline wash tank can be reduced to 0.
• the alkaline wash tank is substantially free of any peroxide.
• the cleaning solution in the alkaline wash tank comprises less than 5 wt% of peroxide, or less than 3 wt% of peroxide, or even less than 1 wt% of peroxide. In the most preferred embodiment, the cleaning solution in the alkaline wash tank is completely free of any peroxide.
• the pretreatment method of the present invention can be primarily classified into two manners, i.e. "outside dosing manner” and “inside dosing manner".
• the detailed description for the two dosing manners is as follows.
• outside dosing manner means, the step of applying a pretreatment solution comprising peroxide to a container to be cleaned for precleaning step is carried out before the container to be cleaned enters into a container cleaning apparatus comprising an alkaline wash tank, which container cleaning apparatus comprises at least one alkaline wash tank. Then, the pretreated container to be cleaned enters into the container cleaning apparatus and enters into the alkaline wash tank therein, wherein the container is cleaned with a cleaning solution in the alkaline wash tank.
• the device for cleaning container of the present invention has the following configuration in which the container pretreatment apparatus and the container cleaning apparatus are separately disposed.
• the pretreatment for a container can be achieved by mounting a simple container pretreatment apparatus before entering into the cleaning system.
• the purpose of saving cost is achieved.
• the additional position and additional amount of peroxide can be accurately controlled, thereby peroxide is sufficiently used and the overall amount of peroxide is lowered.
• inside dosing manner means, the step of applying the pretreatment solution comprising peroxide to a container to be cleaned is carried out inside a container cleaning apparatus comprising an alkaline wash tank.
• the container to be cleaned enters into the container cleaning apparatus first.
• the container enters into an alkaline wash tank therein, and is cleaned with a cleaning solution in the alkaline wash tank.
• the device for cleaning container of the present invention has the following configuration, wherein the container pretreatment apparatus is disposed inside the container cleaning apparatus. That is, one or more lines of nozzles can be placed before each of the alkaline wash tank. Before the container to be cleaned enters into an alkaline wash tank, the pretreatment solution of the present invention is applied to the containers.
• the container enters into the alkaline wash tank.
• the pretreatment solution reacts with the alkaline solution in the alkaline wash tank to release bubbles for breaking the soils.
• the peroxide solution used in the pretreatment step can be heated together with the cleaning solution in the alkaline wash tank, which means the energy supply in the prior art cleaning system and the water spray configurations in the can sufficiently used, resulting in more savings on energy cost.
• the addition position and addition amount of peroxide can also be accurately controlled, thereby peroxide is sufficiently used and the overall amount of peroxide is lowered.
• Container cleaning devices primarily comprise bottle washing machine, such as bottle washing machines made by KRONES, Germany, bottle washing machines made by Nanjing Light Industry Machinery Group, Hefei Zhongchen Light Industrial Machinery Co., Ltd. and the like.
• bottle washing machines such as bottle washing machines made by KRONES, Germany
• bottle washing machines made by Nanjing Light Industry Machinery Group, Hefei Zhongchen Light Industrial Machinery Co., Ltd. and the like.
• One skilled in the art would know that the above exemplification is not an exhaustive for container cleaning devices suitable for the method of the present invention.
• the method of the present invention can be applied using various container cleaning device in the art.
• Embodiments of the present invention are further defined in the following non- limiting Examples. It should be understood that these Examples, while indicating certain embodiments of the invention, are given by way of illustration only. From the above discussion and these Examples, one skilled in the art can ascertain the essential characteristics of this invention, and without departing from the spirit and scope thereof, can make various changes and modifications of the embodiments of the invention to adapt it to various usages and conditions. Thus, various modifications of the embodiments of the invention, in addition to those shown and described herein, will be apparent to those skilled in the art from the foregoing description. Such modifications are also intended to fall within the scope of the appended claims.
• Part A Verification on mold spot cleaning and label removal effects
• the experiments were conducted on recycled glass bottles provided by a beer brewery to verify the effects of the present invention.
• the glass bottles are conventional 550ml glass beer bottle.
• the mold spot coverage level on the recycled beer bottle is rated according to the following scaling:
• mold spot covers the beer bottle bottom at an area of 60% or above, and the mold spot per se is dry and adhered to the bottle bottom;
• mold spot covers the beer bottle bottom at an area of 50% or above but less than 60%, and the mold spot per se is dry and adhered to the bottle bottom;
• mold spot covers the beer bottle bottom at an area of 40% or above but less than 50%, and the mold spot per se is dry and adhered to the bottle bottom;
• mold spot covers the beer bottle bottom at an area of 30% or above but less than
• mold spot covers the beer bottle bottom at an area of 20% or above but less than 30%, and the mold spot per se is dry and adhered to the bottle bottom;
• mold spot covers the beer bottle bottom at an area of 5% or above but less than 10%
• mold spot covers the beer bottle bottom at an area of 3% or above but less than
• mold spot covers the beer bottle bottom at an area of 1% or above but less than
• mold spot covers the beer bottle bottom at an area of greater than 0% but less than 1%
• Mold spot removal rate can be expressed by the following formula:
• Mold spot removal rate (Mold spot level before cleaning - Mold spot level after cleaning)/Mold spot level before cleaning x 100%
• a cleaning solution (which comprises 3 wt% sodium hydroxide, 500 ppm gluconic acid, 1500 ppm Bo-Cleaner C, 120 ppm Bo- Cleaner D, 100 ppm on-alkyl terminated aliphatic alcohol alkoxypolymer (BASF (China)) and 90 ppmethylenediaminepolyoxypropyleneether (Clariant Germany Inc.) was formulated by tap water in a lab environment. The cleaning solution was heated to a temperature of 60°C and held, then the two bottles were soaked into the cleaning solution at the same time.
• the bottles were removed from the cleaning solution and left at room temperature. After 10 minutes, the bottles were emptied. The bottles were washed with warm water and then with cool water. Next, the bottles were stained with methylthionine chloride. Mold levels on the bottle bottom were rated through eye observation and pictures were taken. Meanwhile, the time for Al foil package and front and back labels removal time of the beer bottle was counted.
• Comparative Example A5 Two glass beer bottle with Al foil package and front and back labels were selected by eye observation, and pictures were taken.
• a pretreatment solution was prepared by using tap water in a lab environment, the solution comprised 0.2wt% Stabilon BPU (Ecolab) and 3wt% sodium hydroxide.
• the pretreatment solution was heated to a temperature of 45°C, then 60 ml pretreatment solution was added into the two bottles, and the two bottles were left under room temperature environment. After 5 minutes, the bottles were emptied. Next, the bottles were soaked into a 60°C alkaline cleaning solution comprising 0.2wt% BPU and 3wt% sodium hydroxide. After 10 minutes, the bottles were emptied. The bottles were then cleaned with warm water followed by cool water. Next the bottles were stained with methylthionine chloride. Mold spot level of the bottle bottom was rated through eye observation and pictures were taken. Meanwhile, the time for Al foil package and front and back labels removal time of the beer bottle was counted.
• Comparative Example A9 Cleaning with an alkaline solution, no precleaning Two glass beer bottles with Al foil package and front and back labels were selected by eye observation, and pictures were taken.
• the cleaning solution was prepared by tap water in a lab environment, the solution comprised 0.2wt% Stabilon BPU (Ecolab) and 3wt% sodium hydroxide.
• the cleaning solution was heated to a temperature of 80°C and held, then the two bottles were soaked inthe cleaning solution at the same time. After 10 minutes the bottles were emptied. The bottles were then cleaned with warm water followed by cool water. Next the bottles were stained with methylthionine chloride. Mold spot levels on the bottle bottoms were rated through eye observation and pictures were taken. Meanwhile, the time for Al foil package and front and back labels removal time of the beer bottle was counted.
• Example Al Precleaning with a hydrogen peroxide solution --"inside dosing" Two glass beer bottles with Al foil package and front and back labels were selected by eye observation, and pictures were taken.
• hydrogen peroxide 50wt%, Mitsubishi Gas Chemical Shanghai Commerce Limited
• the pretreatment solution was heated to a temperature of 60°C and held.
• the cleaning solution comprised 3wt% sodium hydroxide solution, 500 ppm gluconic acid, 1500 ppm Bo-Cleaner C, 120 ppm Bo-Cleaner D, 100 ppm non-alkyl terminated aliphatic alcohol alkoxy polymer (BASF (China)), 90 ppm ethylenediamine polyoxypropylene ether (Clariant Germany Inc.), 120 ppm phosphate (Dow Chemicals (Shanghai) Ltd.), 100 ppm aliphatic alcohol polyoxyethylene ether (Dow Chemicals (Shanghai) Ltd.) and 160 ppm Genapol DF 5050 (Clariant Germany Inc.).
• the recycled bottle was soaked in the cleaning solution.
• Example Al The procedure of Example Al was repeated to respectively carry out Example A2-
• Example A1-A5 The results of Example A1-A5 are summarized in the following table 4.
• Example 6 hydrogen peroxide pretreatment solution cleaning -- "outside dosing" Two glass beer bottles with Al foil packages and front and back labels were selected by eye observation, and pictures were taken.
• hydrogen peroxide 50 wt%, Mitsubishi Gas Chemical Shanghai Commerce Limited
• a pretreatment solution with a hydrogen peroxide content of 0.5wt%, and used as such.
• Fifty ml pretreatment solution was added into the two bottles, and the two bottles were left under room temperature environment for 4 minutes and then emptied.
• the bottles were soaked in the alkaline cleaning solution as in Comparative Example 1. After 10 minutes the bottles were emptied.
• the bottles were cleaned with warm water followed by cool water.
• the bottles were stained with methylthionine chloride. Mold levels on the bottle bottom were rated through eye observation and pictures were taken. Meanwhile, the time for Al foil package and front and back labels removal time of the beer bottle was counted.
• Example A6 The procedure of Example A6 was repeated to respectively carry out Example A7-
• Example A6-A9 are summarized in the following table 5-1 and 5-2.
• Example A 10 hydrogen peroxide pretreatment solution cleaning --"outside dosing"
• Two glass beer bottle with Al foil package and front and back labels were selected by eye observation, and were taken pictures.
• hydrogen peroxide 50 wt%, Mitsubishi Gas Chemical Shanghai Commerce Limited
• the pretreatment solution was heated to 45°C for use.
• Thirty ml of the pretreatment solution was added into the two bottles, and the two bottles were left under room temperature environment for 4 minutes and then emptied.
• the bottles were soaked into the alkaline cleaning solution as in Comparative Example 1. After 10 minutes, the bottles were emptied.
• the bottles were cleaned with warm water followed by cool water.
• the bottles were stained by methylthionine chloride. Mold levels on the bottle bottom were rated through eye observation and pictures were taken.
• Example A 10 The procedures of Example A 10 as repeated to respectively carry out Example A 11-
• Example A10-A15 The results of Example A10-A15 are summarized in the following table 6.
• Table 6-1 Mold spot removal Example Mold spot level before Mold spot level after Mold spot removal No. cleaning cleaning rate
• the following table 7 summarizes average mold spot cleaning effect of each of Comparative Examples and Examples in the above Part A.
• the average mold spot cleaning effects are the arithmetic average of the mold spot removal rate obtained from the each set of Comparative Examples and Examples.
• Part B Verification on mud cleaning effect
• the mud coverage level on recycled beer bottles is rated according to the following scaling:
• mud covers inside and outside the beer bottle at an area of 50% or above but less than 60%;
• mud covers inside and outside the beer bottle at an area of 30% or above but less than 40%;
• mud covers inside and outside the beer bottle at an area of 20% or above but less than 30%;
• mud covers inside and outside the beer bottle at an area of 10% or above but less than 20%;
• mud covers inside and outside the beer bottle at an area of 1% or above but less than 3%;
• mud covers inside and outside the beer bottle at an area of less than 1%;
• Mud removal rate can be expressed by the following formula:
• Mud removal rate (Mud level before cleaning - Mud level after cleaning)/ Mud level before cleaning x 100%
• Comparative Example Bl Blank test — conventional cleaning manner, no pretreatment
• Comparative Example B l Two glass beer bottles with relatively high mud coverage level were selected through eye observation, and pictures were taken. In Comparative Example B l, no pretreatment was carried out on the beer bottles to be cleaned. Under lab environment, tap water was used to prepare a cleaning aqueous solution, which comprises 3wt% sodium hydroxide, 500ppm gluconic acid, 1500 ppm Bo-Cleaner C (Ecolab), 120 ppm Bo-Cleaner D (Ecolab), 100 ppm non-alkyl terminated aliphatic alcohol alkoxy polymer (BASF (China)) and 90 ppm ethylenediamine polyoxypropylene ether (Clariant Germany Inc.).
• a cleaning aqueous solution which comprises 3wt% sodium hydroxide, 500ppm gluconic acid, 1500 ppm Bo-Cleaner C (Ecolab), 120 ppm Bo-Cleaner D (Ecolab), 100 ppm non-alkyl terminated aliphatic alcohol al
• the cleaning solution was heated to a temperature of 60 °C and held, then the two bottles were soaked into the cleaning solution at the same time. After 10 minutes, the bottles were emptied. Then, the bottles were cleaned with warm water, then with cool water. Next, the mud level was rated through eye observation and pictures were taken.
• Comparative Example B5 Two glass beer bottles with relatively high mud coverage level were selected through eye observation, and pictures were taken.
• a pretreatment solution was prepared by tap water under lab environment, the solution comprises 0.2wt% Stabilon BPU (Ecolab) and 3wt% sodium hydroxide.
• the pretreatment solution was heated to a temperature of 45°C, then 60 ml pretreatment solution was added into the two bottles, and the two bottles were left under room temperature environment. After 5 minutes, the bottles were emptied. Next, the bottles were soaked into an alkaline cleaning solution comprising 0.2wt% BPU and 3wt% sodium hydroxide. After 10 minutes, the bottles were emptied. Then, the bottles were cleaned with warm water, then with cool water. The mud level was rated through eye observation and pictures were taken.
• Example Bl hydrogen peroxide pretreatment solution cleaning -- "outside dosing" Two glass beer bottles with relatively high mud coverage level were selected through eye observation, and were taken pictures.
• hydrogen peroxide 50 wt%, Mitsubishi Gas Chemical Shanghai Commerce Limited
• the pretreatment solution was heated to 45°C for use.
• Thirty ml above pretreatment solution was added into the two bottles, and the two bottles were left under room temperature environment for 4 minutes and then emptied.
• the bottles were soaked in the alkaline cleaning solution as in Comparative Example 1. After 10 minutes the bottles were emptied. The bottles were then cleaned with warm water followed by cool water. The mud level was rated through eye observation and pictures were taken.
• Example B l The procedure of Example B l was repeated to respectively carry out Example B l-
• Example B 1-B4 The results of Example B 1-B4 are summarized in the following Table 1 1.
• the following table 12 summarizes the average cleaning effects of various Comparative Example and various Example.
• the average cleaning effects are the arithmetic averages of Mud removal rates obtained from each set of Comparative Examples and Examples.
• Part C Verification on controllable addition amount of hydrogen peroxide
• an alkaline cleaning solution provided by a beer brewery was added in a beaker, and then hydrogen peroxide. Titration was carried out with a sodium thiosulfate titration method. Titration was carried out every 5 minutes. The decomposition rate of hydrogen peroxide in the alkaline solution was tested. The additional amount of hydrogen peroxide was calculated by the volume of the alkaline wash tank of the brewery to be 25- 100 kg/hour. The additional amount correlates with the contamination level in the alkaline solution. It can be seen that the amount of hydrogen peroxide cannot be controlled by directly adding hydrogen peroxide into an alkaline wash tank of a bottle washing machine due to different contamination levels in the alkaline solution.

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• 2014
  • 2014-07-23 CN CN201410353894.2A patent/CN105268708A/zh active Pending
• 2015
  • 2015-07-18 EP EP15824652.0A patent/EP3171994B1/fr active Active
  • 2015-07-18 WO PCT/US2015/041040 patent/WO2016014367A1/fr not_active Ceased

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