EP0458845B1 - Detergent additive granulate and method for production thereof - Google Patents

Detergent additive granulate and method for production thereof Download PDF

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Publication number
EP0458845B1
EP0458845B1 EP90903319A EP90903319A EP0458845B1 EP 0458845 B1 EP0458845 B1 EP 0458845B1 EP 90903319 A EP90903319 A EP 90903319A EP 90903319 A EP90903319 A EP 90903319A EP 0458845 B1 EP0458845 B1 EP 0458845B1
Authority
EP
European Patent Office
Prior art keywords
core
granulate
shell
detergent additive
granulate according
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.)
Expired
Application number
EP90903319A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0458845A1 (en
Inventor
Erik Kjaer Markussen
Per Falholt
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.)
Novozymes AS
Original Assignee
Novo Nordisk AS
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
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Application filed by Novo Nordisk AS filed Critical Novo Nordisk AS
Publication of EP0458845A1 publication Critical patent/EP0458845A1/en
Application granted granted Critical
Publication of EP0458845B1 publication Critical patent/EP0458845B1/en
Expired legal-status Critical Current

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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
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
    • 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
    • C11D3/16—Organic compounds
    • C11D3/38—Products with no well-defined composition, e.g. natural products
    • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
    • C11D3/38672—Granulated or coated enzymes

Definitions

  • This invention relates to a detergent additive granulate and a method for production thereof.
  • drum granulator represents a broad category of granulator devices, comprising for instance pan granulators and granulation mixers.
  • the enzyme containing granulate described in EP-A-0304332 comprises a core surrounded by a coating comprising cellulose fibres or artificial fibres in an amount of 1.5 to 40% by weight, based on the dry weight of the granulate except for the core, a binder in an amount of 0 to 15% by weight, based on the dry weight of the granulate, except for the core, a filler, and one or more granulating agents, whereby the core and/or the coating contains an enzyme.
  • the invention is a further development of the special embodiment of the invention described in EP-A-0304332, which comprises an enzyme in either the core or the shell.
  • the shell or the core in the detergent additive granulate according to the invention does not necessarily contain an enzyme; but the core contains one detergent additive (which may be an enzyme, here identified as the primary detergent additive), and the shell contains another detergent additive (which may be another enzyme, here identified as the secondary detergent additive).
  • the primary detergent additive should be protected against the secondary detergent additive and/or environmental factors, e.g. in cases where an enzyme is degraded by a bleaching agent and humidity in the atmosphere, or vice versa
  • there is a need for an effective separation between the primary and secondary detergent additives during storage there is a need for a granulate with high physical strength, and for a corresponding method of production, which is easily controllable and adapted for an industrial scale.
  • the purpose of the invention is the provision of a detergent additive granulate with a high physical strength and which contains a primary and a secondary detergent additive of the above mentioned kind, wherein the primary and secondary detergent additives are effectively separated from each other and/or from harmful environmental factors, and the provision of a corresponding method of production, which is easily controllable and adapted for an industrial scale.
  • the detergent additive granulate according to the invention comprises a core with a primary detergent additive surrounded by a shell comprising a secondary detergent additive, a binder, and granulating agents, and optionally a filler, and a protective coating between the core and the shell, whereby the shell comprises cellulose fibres or artificial fibres, preferably in an amount of between 1.5 and 40% by weight of the shell, more preferably between 5 and 20% by weight of the shell, and whereby the core facultatively comprises cellulose fibres or artificial fibres, preferably in an amount of between 1.5 and 40% by weight of the core, more preferably between 5 and 20% by weight of the core.
  • the detergent additive granulate according to the invention comprises a shell with a secondary detergent additive and cellulose fibres or artificial fibres.
  • EP 0 286 773 describes encapsulated enzymes, which in some regards are similar to the detergent additive granulate according to the invention in its broadest aspect.
  • the prior art encapsulated enzymes do not contain reinforcing cellulose fibres or artificial fibres in the shell and is not described as being produced by means of the above indicated granulator method, but by means of the fluid bed method, which is not well adapted to production on an industrial scale.
  • the protective coating can be any protective coating used in the art, which does not hurt the primary or secondary detergent additives or in other manner disturb the manufacturing process or the application of the granulate.
  • Examples of usable protective coatings are: fatty acid esters, alkoxylated alcohols, polyvinyl alcohols, ethoxylated alkylphenols, polyethylene glycols (MW 1000 to 8000), linear alcohol alkoxylates (MW 1450 to 2670), polyvinyl pyrrolidone (MW 26000 to 33000), polymeric nonylphenyl ethoxylates (MW 1975 to 4315), and dinonylphenyl ethoxylate (average MW 6900), fatty acids, e.g.
  • palmitic acid stearic acid, and arachidonic acid
  • paraffins bee wax, waxes, mono-, di- or triglycerides of single fatty acids or mixed fatty acids, fatty alcohols, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, and coconut monoethanol amide.
  • pairs of primary and secondary detergent additives are the following: (optical brightener)-(enzyme), (enzyme)-(optical brightener), (enzyme)-(bleach activator), (bleach activator)-(enzyme), (bleach activator)-(optical brightener), (optical brightener)-(bleach activator), (enzyme-chlorine scavenger), (bleach activator-chlorine scavenger), (optical brightener-chlorine scavenger), (bleaching agent)-(enzyme), and (enzyme)-(bleaching agent).
  • the core is of a shape corresponding to a maximum ratio between the largest and the smallest dimension of around 3, preferably around 2, more preferably around 1.5. In this embodiment a satisfactory coating around the core can always be obtained.
  • the amount of the core is between 5 and 85% by weight, preferably between 10 and 50% by weight of the granulate, most preferably between 15 and 40% by weight of the granulate. If the amount of the core is above 85%, the loading of a sufficient amount of secondary detergent additive will be difficult, and if the amount of the core is less than 5%, the loading of a sufficient amount of primary detergent additive will be difficult.
  • the core has a mean particle size between 100 and 100 ⁇ m, preferably 200-700 ⁇ m.These are the particle sizes most often required by the users.
  • the core or the shell contains an enzyme.
  • An enzyme is a typical detergent additive which needs protection from aggressive detergent components.
  • the enzyme is a protease, an amylase, a lipase, an amidase, a cellulase, or an oxidase. These are the most common enzymes for industrial detergent purposes.
  • the filler consists of or comprises inorganic salts.
  • the filler consists of or comprises inorganic salts.
  • the shell is surrounded by a final dust suppressing coating.
  • This final dust suppressing coating can also in certain cases serve as a further protective coating.
  • the protective coating is a mixture of a mono- and diglyceride of a fatty acid. It has been found that in this embodiment a most satisfactory protective action during the storage can be obtained. Advantageously mixtures of the kind described in EP-A-0304332 can be used.
  • the protective coating contains an antioxidant.
  • Suitable examples of antioxidants or reduction agents are thiosulphates, sulfites, bisulfites, ascorbic acid, ascorbates, or butyl hydroxy toluene. In many cases an even better storage stability can be obtained due to the presence of the antioxidant.
  • the invention comprises a method for production of the granulate according to the invention.
  • the method for the production of the detergent additive granulate according to the invention comprises the introduction of the core into a granulating drum, whereafter sequentially the protective coating agent, the shell material and optionally a final dust suppressing coating agent, and furthermore cellulose fibres or artificial fibres in the appropriate amounts and at the appropriate stages, are introduced into the granulating drum.
  • any granulating drum can be used in relation to the method according to the invention. The entire process can be carried out in one of these granulating drums.
  • the core can be coated with the protective coating agent in one granulating drum, whereafter the coated core can be isolated an transferred to another granulating drum for application of the shell, whereafter if wanted application of a dust suppression coating can be performed on the same granulating drum or another granulating drum.
  • the method according to the invention can be performed both batchwise and continuously.
  • the granulate is dried on a fluid bed to a water content below 1% and finally sifted to get a product with particle range 300 ⁇ m to 900 ⁇ m.
  • Example 7 kg of a granulate produced as described in Example 1 with particle size between 300-900 ⁇ m is coated with a layer of glyceryl stearate/palmitate Grindtek MSP 90 (melting point 68°C) and bentonite ASB 350 ECC in the following manner.
  • the granulate is heated to 75-80°C in a 20 l heat jacketed Lödige mixer which temperature is kept during the whole coating process.
  • the heated granulate is mixed and sprayed with 700 g melted MSP90 followed by a powdering with 1000 g bentonite followed by spraying with 210 g MSP90 followed by powdering with 1000 g MSP90 followed by spraying with 210 g MSP90.
  • the granulate is finally cooled to room temperature on a fluid bed and sifted between 300 and 1000 ⁇ m.
  • a granulate with an inner core containing an optical brightener and an outer shell containing a proteolytic enzyme with the core and the shell separated by a protective layer is produced in the following manner.
  • the granulate is finally dried to a water content below 1 % and sifted between 300 and 1000 ⁇ m.
  • the granulate has proteolytic activity of 6.0 KNPU/g.
  • Example 3 7 kg of granulate as produced as described in Example 3 is coated with a layer of sodium thiosulphate and kaolin by a conventional fluid bed coating process.
  • 280 g sodium thiosulphate and 280 g kaolin SPESWHITE ECC are dissolved/dispersed in 1000 g of water and sprayed onto the 7 kg of granulate in a Glatt WSG 5 fluid bed with continuous layering and drying.
  • the granulate has a proteolytic activity of 5.2 KNPU/g.
  • Example 4 7 kg of granulate produced as described in Example 4 is coated with a protective coating of 280 g Grindtek MSP90 followed by 875 g titanium dioxyde: Kaolin (SPESWHITE) 1:1 followed by 140 g Grindtek MSP90 as described in example 2.
  • the granulate is cooled to room temperature on a fluid bed and sifted between 300 and 1000 ⁇ m.
  • the granulate has a proteolytic activity of 4.7 KNPU/g.
  • the stability test is made at a temperature of 37°C and a humidity of 70%.
  • the granulate was dried to a water content below 1 % and finally sifted to obtain a product with particle range 300 ⁇ m to 900 ⁇ m.
  • a granulate with an inner core containing TAED and an outer shell containing a proteolytic enzyme with the core and the shell separated by a protective layer was produced in the following manner.
  • the shell was supplied with 1.4 kg of a 28.5% aqueous solution of a carbohydrate binder in the manner described in Danish patent No. 157937, Example 1, except that in the present example the core contains a perborate activator, TAED, and that a 50 l Lödige mixer was used.
  • the granulate was finally dried to a water content below 1 % and sieved to between 300 ⁇ m and 100 ⁇ m.
  • a TAED containing granulate coated with hydrogenated tallow was produced as described in Example 6, except that 20% kaolin was used in the wax coating step.
  • a granulate with an inner core containing TAED and an outer shell containing an optical brightener and with the core and the shell separated by a protective layer was produced in the following manner.
  • the shell was supplied with a continuous self-regulating loss-in-weight powder dosing system with a powder dosing rate of 20 kg/h. As a total 1.4 kg of an 28.5% aqueous carbohydrate binder solution was sprayed to bind the powder to the surface of the core particles. Otherwise the layering was applied as described in PCT WO 89/08695, Example 1.
  • the granulate was finally dried to a water content below 1 % and sieved to obtain a product with particle range 300 - 900 ⁇ m.
  • the shell was supplied with a continuous self-regulating loss-in-weight powder dosing system with a powder dosing rate of 20 kg/h and with a total of 2.6 kg of an 26.2% aqueous carbohydrate binder solution, and otherwise as described in PCT WO 89/08695, Example 1.
  • the granulate was finally dried to a water content below 1 % and sieved to obtain a product with particle range 300 - 900 ⁇ m.
  • a granulate with an inner core containing the proteolytic enzyme SAVINASE® and an outer shell containing a chlorine scavenger, whereby the core and the shell was separated by a protective layer was produced in the following manner.
  • the granulate was finally dried to a water content below 1 % and sieved to obtain a product with particle range 300 - 1000 ⁇ m.
  • the granulate was finally dried to a water content below 1% and sieved to obtain a product with particle range 300 - 1000 ⁇ m.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)
EP90903319A 1989-02-20 1990-02-16 Detergent additive granulate and method for production thereof Expired EP0458845B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK780/89 1989-02-20
DK078089A DK78089D0 (da) 1989-02-20 1989-02-20 Detergentholdigt granulat og fremgangsmaade til fremstilling deraf

Publications (2)

Publication Number Publication Date
EP0458845A1 EP0458845A1 (en) 1991-12-04
EP0458845B1 true EP0458845B1 (en) 1992-12-23

Family

ID=8097473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90903319A Expired EP0458845B1 (en) 1989-02-20 1990-02-16 Detergent additive granulate and method for production thereof

Country Status (7)

Country Link
EP (1) EP0458845B1 (da)
JP (1) JP2801395B2 (da)
AT (1) ATE83797T1 (da)
DE (1) DE69000662T2 (da)
DK (2) DK78089D0 (da)
ES (1) ES2036904T3 (da)
WO (1) WO1990009428A1 (da)

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DK78089D0 (da) 1989-02-20
DE69000662D1 (de) 1993-02-04
JP2801395B2 (ja) 1998-09-21
ES2036904T3 (es) 1993-06-01
DK0458845T3 (da) 1993-03-29
JPH04503369A (ja) 1992-06-18
DE69000662T2 (de) 1993-04-22
ATE83797T1 (de) 1993-01-15
WO1990009428A1 (en) 1990-08-23
EP0458845A1 (en) 1991-12-04

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