EP0789636A1 - Amelioration de l'elimination des corps gras dans les conduites d'evacuation des eaux usees - Google Patents

Amelioration de l'elimination des corps gras dans les conduites d'evacuation des eaux usees

Info

Publication number
EP0789636A1
EP0789636A1 EP95938928A EP95938928A EP0789636A1 EP 0789636 A1 EP0789636 A1 EP 0789636A1 EP 95938928 A EP95938928 A EP 95938928A EP 95938928 A EP95938928 A EP 95938928A EP 0789636 A1 EP0789636 A1 EP 0789636A1
Authority
EP
European Patent Office
Prior art keywords
surfactant
drain
water
cosurfactant
grease
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95938928A
Other languages
German (de)
English (en)
Other versions
EP0789636A4 (fr
Inventor
Vickie L. Humphrey
Suzanne M. Thompson
Elizabeth A. Cable
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clorox Co
Original Assignee
Clorox Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Clorox Co filed Critical Clorox Co
Publication of EP0789636A1 publication Critical patent/EP0789636A1/fr
Publication of EP0789636A4 publication Critical patent/EP0789636A4/fr
Withdrawn legal-status Critical Current

Links

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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/83—Mixtures of non-ionic with anionic compounds
    • C11D1/8305—Mixtures of non-ionic with anionic compounds containing a combination of non-ionic compounds differently alcoxylised or with different alkylated chains
    • 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
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B01D17/047—Breaking emulsions with separation aids
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/825—Mixtures of compounds all of which are non-ionic
    • C11D1/8255—Mixtures of compounds all of which are non-ionic containing a combination of compounds differently alcoxylised or with differently alkylated chains
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/04—Carboxylic acids or salts thereof
    • C11D1/06—Ether- or thioether carboxylic acids
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/34—Derivatives of acids of phosphorus
    • C11D1/345—Phosphates or phosphites
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/72—Ethers of polyoxyalkylene glycols

Definitions

  • the invention relates to a drain cleaner in which a critical ratio and amount of at least one nonionic surfactant and, optionally, one or more cosurfactants, results in vastly improved grease removal in drains.
  • Another approach is to use a biological drain opener, in which a combination of fat-digesting microorganisms which colonizes and digests the clog over time.
  • the microorganisms typically include a mixture of bacteria which uses hydrolase enzymes to digest the clog, such as proteases and Upases.
  • hydrolase enzymes to digest the clog, such as proteases and Upases.
  • An example of this type of cleaner is described in EP 0 569 140 (Sybron Chemical Co.).
  • the mvention provides an unproved dram cleaner comprising a fat-solubilizing amount of at least one nonionic surfactant and, optionally, one or more cosurfactants, providing thereby at least about 0 08g of active surfactant to a grease clog
  • additives can be added, including, but not limited to, solvents, enzymes, microorgamsms, fragrances, preservatives and other adjuncts known to those skilled in the art
  • the invention is an improved drain cleaner comprising a fat-solubilizing amount of at least one nonionic surfactant and, optionally, one or more cosurfactants. thereby providing at least about 0 08g of actives to a grease clog
  • adjuncts such as solvents, enzymes, microorganisms, fragrances, dyes, preservatives and the like can be included to provide desirable attributes of such adjuncts
  • the nonionic surfactant is generally chosen from the C 10 ., 5 linear alkyl ethoxylates. with an ethylene oxide content of about 5 to 9 moles of ethylene oxide per mole of alcohol ("EO").
  • Representative surfactants include the Alfonic surfactants, sold by Conoco, such as Alfonic 1412-60, a C, 2 . 14 ethoxylated alcohol with 7 moles of EO; Neodol surfactants, sold by Shell Chemical Company, such as Neodol 25-7, a C, 2.IS ethoxylated alcohol with 7 moles of EO, Neodol 45-7, a C, 4 . 15 ethoxylated alcohol with 7 moles of EO; Surfonic surfactants, also sold by Huntsman Chemical Company, such as Surfonic L24-7, a C 12 . ⁇ 4 ethoxylated alcohol with 7 moles of
  • EO ethylene glycol
  • Tergitol surfactants sold by Union Carbide, such as Ter itol 25-L-7, a C, : . 15 ethoxylated alcohol with 7 moles of EO.
  • HLB hydrophile-lipophile balances
  • At least one cosurfactant is also optionally present in the invention and is typically either.
  • the linear alcohol ethoxylate with a lower EO content with typically a lower EO content than the surfactant would include: Alfonic 1412-40, a C, 2 . 14 ethoxylated alcohol with 3 moles of EO; Neodol 25-3, a C, : . 15 ethoxylated alcohol with 3 moles of EO, Neodol 91-2.5, a C 9 . ⁇ ethoxylated alcohol with 2.5 moles of EO; Surfonic L24-3. a C ⁇ : i4 ethoxylated alcohol with 3 moles of EO; and Tergitol 25-L-3. a C ! : .u ethoxylated alcohol with 3 moles of EO.
  • this cosurfactant will generally act more as a wetting agent and will be more oil soluble than water soluble.
  • the secondary ethoxylated alcohols include Tergitol 15-S-3, a C 1 5 secondary ethoxylated alcohol, with 3 moles of EO, from Union Carbide.
  • the branched surfactants especially preferred of which are tridecyl ethers, include Trycol TDA-3, a tridecyl ether with 3 moles of EO, from Henkel KGaA (formerly, Emery), and Macol TD 3, a tridecyl ether with 3 moles of EO, from PPG Industries.
  • the alkyl ether ethoxylates include C ⁇ ., g alcohol alkoxycarboxylates, such as the Sandopan esters, e.g., Sandopan DTC, from Sandoz Chemicals.
  • the phosphate esters include 2-ethylhexyl, octyl, and decyl phosphates, sold by a number of manufacturers (See, also, Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Ed., p. 361, (1983), incorporated herein by reference).
  • the amount of surfactant and cosurfactant to be included in the novel drain opener formulations herein should be present in the formulation at a level above about 1.5%, but below about 6%, with the greatest effect achieved between 2.5% to 5%. It has surprisingly been found that the level of surfactant and cosurfactant ("Total Surfactant level”) is critical. First, while a low level of Total Surfactant (e.g., 1%) is ineffective to remove a fatty clog, it has also been found that once the critical threshold amount to dissolve/disperse the fatty clog has been achieved, there is a peak effect which is not further improved once the 6% level has been exceeded.
  • the ratio of surfactant to cosurfactant must be at least 1 .2. and is most preferably greater than 1 : 1. Because of the limited surface area of a clog which is available to be acted on by the surfactant, or surfactant cosurfactant mixture, it has been discovered that a critical amount of the surfactant, or surfactant/cosurfactant mixture effectively removes/disperses grease. And, beyond this critical amount, little or no further effect is seen. It is speculated that because there is such a limited surface area in the drain for the surfactant to attack, that this results in the need for the critical amount. This is thus dramatically unlike hard surface cleaning, where there is a linear correlation between the amount of surfactant used and the amount of soil removed or lifted from the soiled substrate.
  • the typical drain trap (also called a "P-trap" because of its curved configuration) forms grease deposits having an elliptical shape.
  • the typical amount of drain opener delivered to said clog is a dilution of about 1 : 10 to 1 :50, most preferably about 1 :25.
  • the present invention demonstrates that despite a relatively low level of active reaching the clog, there is an unexpectedly marked increase in grease dispersion/dissolution/digestion such that the clog is effectively removed after treatment with the cleaner and water flows smoothly through the draintrap once more.
  • Suitable preservatives include Kathon GC, a 5-chloro-2-methyl-4- ⁇ soth ⁇ azohn-3-one, Kathon ICP, a 2-methyl-4- ⁇ soth ⁇ azol ⁇ n-3-one, and a blend thereof, and Kathon 886, a 5-chloro-2-methyl-4- ⁇ soth ⁇ azoi ⁇ n-3-one, all available from Rohm and Haas Company, Bronopol, a 2-bromo-2-n ⁇ tropropane 1.3-d ⁇ ol, from Boots Company Ltd , Proxel CRL, a propyl-p-hydroxvbenzoate, from ICI PLC, Nipasol M, an o-phenvl-phenol.
  • hydrolase enzymes such as proteases, amvlases, cellulases and lipases may be included
  • proteases are one especially preferred class of enzymes
  • Thev are selected from acidic, neutral and alkaline proteases
  • the terms "acidic,” “neutral " and “alkaline.” refer to the pH at which the enzvmes' activity are optimal
  • An example of a neutral protease includes trypsin, a naturallv occurring protease
  • Alkaline proteases are available from a wide vanetv of sources, and are typically produced from various microorganisms (e g , BaciUis subti sin) Tvpical examples of alkaline proteases include Maxatase® and
  • amylases which are carbohydrate-hydrolyzmg enzymes It is also preferred to include mixtures of amylases and proteases Suitable amylases include Rapidase®, from Societe
  • hpases such as those described in Silver, U S 3,950,277, Thorn et al , U S 4,707,291, Wiersema et al , U S 5,296, 161 and 5.030.240, all of which are incorporated herein by reference
  • Still further suitable enzymes are cellulases, such as those described in Tai, U S 4 479,881, Murata et al . U S 4,443,355, Barbesgaard et al . U S 4,435,307, and Ohva et al , U S 3,983 082. incorporated herein by reference
  • the hydrolytic enzyme should be present in an amount of about 0 0001 - 1 % (based on 100% active enzyme, most commercially vended enzymes are sold as liquids, slurries, prills or solids, in which either a liquid or solid filler/stabilizer is included, e g , propylene glycol)
  • a liquid or solid filler/stabilizer e g , propylene glycol
  • the solvent can be selected from both water soluble and water miscible organic solvents and from poorly water soluble organic solvents
  • Some of the water soluble solvents include C, 6 alkanol. C 3 24 alkylene glycol ether, and mixtures thereof
  • the alkanol can be selected from methanol. ethanol, n-propanol. isopropanol, butanol, pentanol. hexanol, their various positional isomers, and mixtures of the foregoing
  • isopropanol usually in conjunction with a glycol ether
  • the diols such as methylene. ethylene.
  • the poorly soluble solvents can include such materials as d-hmonene, pine oil. and other terpene derivatives, such as terpene hydrocarbons (e g,s , 8
  • the amount of solvent present may vary from 0 to 50%, more preferably 0 to 10%, but such level is not critical
  • a builder may be selected from organic and inorganic builders, such as from the group consisting of ethylene diamine tetraacetates (EDTA), carboxvlates. such as citric, gluta ⁇ c or acetic acids (and their salts), alkali metal carbonates, alkali metal silicates, alkali metal phosphates, and mixtures thereof
  • a co-builder selected from ammonium, alkali metal and alkaline earth metal hydroxides may be desirable
  • Certain builders also act as buffers, both acidic and basic, and their inclusion may also be desirable herein As well, buffers, such as NaOH, H,SO 4 , HC1, etc , may be desirable
  • the level of builder can be fairly low, but is not critical
  • the amount herein can vary from about 0 to 15%, more preferably 0 to 5%
  • the builder is below 1%
  • the drain opener is an aqueous cleaner with relatively low levels of actives
  • the principal ingredient is water, which should be present at a level of at least about 50%, more preferably at least about 80%, and most preferably, at least about 90% Deionized water is most preferred
  • Adjuncts for cleaning include additional surfactants, such as those described in Kirk-Othmer. Encyclopedia of Chemical Technology. 3rd Ed . Volume 22, pp 332-432 (Marcel-Dekker. 1983), which are incorporated herein by reference
  • Aesthetic adjuncts include fragrances, such as those available from Givaudan. IFF, Quest and others, and dyes and pigments which can be solubilized or suspended in the formulation, such as diaminoanthraquinones.
  • the amounts of these cleaning and aesthetic adjuncts should be in the range of 0-2%, more preferably 0-1%.
  • Example 1 As is known the conditions in drain traps varies from household to household, and situation to situation However, generally speaking, it has been observed that residents in households will pour melted fats and oils, such as butter, bacon fat, cooking oils and the like, even though often cautioned against so doing When the molten fats and oils meet the residual water in the drain, or, as is often the case, the water running from a spigot or faucet, these fats and oils solidify and begin to deposit on the closest horizontal surface, typically, the horizontal portion of a drain or P-trap Because the dram trap is a pipe of circular bore, the forming grease plug or clog molds into an elliptical mass, which eventually clogs the trap Previous drain cleaners, such as caustic chemicals, have been attempted with varying rates of success, since they will principally heat the standing water due to the exothermic heat of reaction from the combination of water and caustic
  • Examples 2-1 1 In these examples, ten different formulations, all with 3% total surfactant, were prepared In dosing the grease clog samples the formulations were each diluted 1 25, smce it has been found that there is always standmg or residual water in dram traps, drain cleaners will be diluted prior to reaching the clog from 1: 10 to 1 50, with 1.25 dilution being very representative.
  • the formulations generally comprised a base formulation (shown in TABLE I below) combinations of surfactant A, which was a C, 2 14 linear ethoxylated alcohol, with about 7 moles of ethylene oxide, cosurfactant B, which was a C 12 . M linear ethoxylated alcohol, with about 3 moles of ethylene oxide; and cosurfactant C, which was a tridecyl ether, with about 3 moles of ethylene oxide
  • Example 14 is instructive in demonstrating that when the outer limit of the invention is reached, namely, to exceed 6% surfactant, then grease removal is not only not enhanced, it may actually be impaired. This was a very surprising finding, given that for hard surface cleaners, one can typically see a linear relationship between the amount of surfactant added and the amount of soil removed.
  • TABLE V below demonstrates the performance of the invention versus currently available commercial formulations.
  • Example 15 is a currently available commercial liquid drain buildup remover, which uses about 3% nonionic surfactants, which are ethoxylated nonylphenol ethers.
  • Example 16 is representative of the invention and uses a ternary surfactant blend, just as in Example 7, above.
  • Example 17 is another commercially available liquid drain buildup remover which, however, uses only about 0.5% total nonionic surfactant, which is expected to comprise ethoxylated nonylphenol ethers.
  • Example 17 also is believed to contain a small amount of lipase enzyme. Apart from the stated surfactant and/or enzymes, Examples 15 and 17 will contain somewhat roughly similar ingredients as set forth in the Base Formulation, TABLE I. TABLE V

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Detergent Compositions (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

L'invention concerne une composition de produit d'élimination pour conduites d'évacuation, permettant d'éliminer un bouchon de graisse d'une conduite, laquelle retient un certain volume d'eau. La composition comprend au moins environ 2 % d'au moins un agent tensioactif et, en variante, un ou plusieurs cotensioactifs, le rapport entre l'agent tensioactif et le cotensioactif étant d'au moins 1:2, le reste étant de l'eau, et la quantité de la composition par rapport à l'eau retenue étant d'environ 1:10 à 1:50.
EP95938928A 1994-11-01 1995-10-27 Amelioration de l'elimination des corps gras dans les conduites d'evacuation des eaux usees Withdrawn EP0789636A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US33296794A 1994-11-01 1994-11-01
US332967 1994-11-01
PCT/US1995/013880 WO1996013342A1 (fr) 1994-11-01 1995-10-27 Amelioration de l'elimination des corps gras dans les conduites d'evacuation des eaux usees

Publications (2)

Publication Number Publication Date
EP0789636A1 true EP0789636A1 (fr) 1997-08-20
EP0789636A4 EP0789636A4 (fr) 1999-06-09

Family

ID=23300667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95938928A Withdrawn EP0789636A4 (fr) 1994-11-01 1995-10-27 Amelioration de l'elimination des corps gras dans les conduites d'evacuation des eaux usees

Country Status (8)

Country Link
EP (1) EP0789636A4 (fr)
JP (1) JPH10508335A (fr)
KR (1) KR970706918A (fr)
BR (1) BR9509121A (fr)
CA (1) CA2201500A1 (fr)
MX (1) MX9504605A (fr)
PL (1) PL321133A1 (fr)
WO (1) WO1996013342A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1106200A (en) * 1998-10-16 2000-05-08 S.C. Johnson & Son, Inc. Scrub free formulation for cleaning surfaces
US20050107275A1 (en) * 2003-11-14 2005-05-19 Hecht Stacie E. Liquid detergent composition comprising a solubilizing nonionic surfactant
KR101598765B1 (ko) * 2015-11-27 2016-03-25 주식회사 청수이앤에스 배수관용 미생물 유지방 세정제 조성물 블록 및 그 세정제 조성물 블록의 제조방법

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472783A (en) * 1966-02-02 1969-10-14 Winston B Smillie Nonionic detergent compositions
US3553146A (en) * 1966-10-17 1971-01-05 Drackett Co Liquid drain cleaner
DE2900232C2 (de) * 1978-01-09 1985-04-11 Unilever N.V., Rotterdam Flüssiges Reinigungsmittel
GB2012804B (en) * 1978-01-19 1982-03-10 Lankro Chem Ltd Quick break cleaning composition
US4496470A (en) * 1981-01-12 1985-01-29 The B. F. Goodrich Company Cleaning composition
EP0569140A1 (fr) * 1992-04-16 1993-11-10 Sybron Chemical Holdings Inc. Formulation de débouchage des tuyaux d'écoulement
US5429764A (en) * 1993-08-24 1995-07-04 Eftichios Van Vlahakis Liquid drain opener compositions based on sulfuric acid

Also Published As

Publication number Publication date
MX9504605A (es) 1997-04-30
PL321133A1 (en) 1997-11-24
EP0789636A4 (fr) 1999-06-09
WO1996013342A1 (fr) 1996-05-09
CA2201500A1 (fr) 1996-05-09
KR970706918A (ko) 1997-12-01
BR9509121A (pt) 1998-07-14
JPH10508335A (ja) 1998-08-18

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