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
  • C11D3/16—Organic compounds
  • C11D3/38—Products with no well-defined composition, e.g. natural products
  • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
  • C11D3/38636—Preparations containing enzymes, e.g. protease or amylase containing enzymes other than protease, amylase, lipase, cellulase, oxidase or reductase
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
  • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
  • D06L4/12—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen combined with specific additives

Definitions

• a bleaching process is usually carried out before dyeing textile materials, especially if light and brilliant shades are to be achieved.
• Oxidation systems such as H 2 O 2 / NaOH or corresponding peroxide derivatives are used for this.
• Such alkaline bleaching treatments using hydrogen peroxide have the disadvantage that the excess of peroxide and alkali must be carefully removed from the substrate and from the liquor, since it leads to incorrect results in the subsequent dyeing (Melliand Textilberichte 71 (1990), 205 to 207 ).
• the invention relates to an enzymatic process for removing Hydrogen peroxide from bleaching liquors in the textile industry, which is characterized is that after the bleaching process has ended the degradation of the in the fleet and on the hydrogen peroxide remaining in the textile material without previous partial or complete neutralization is carried out, a mixture of Catalase and a highly concentrated buffer is used.
• the invention accordingly also relates to a mixture of an enzyme which is able to degrade peroxide, i.e. a catalase, and a highly concentrated one Buffer, in the presence of which the enzyme is stable and active, which in can buffer a pH range of 4-9 and even in small amounts Allows lowering the pH in the desired range.
• an enzyme which is able to degrade peroxide, i.e. a catalase, and a highly concentrated one Buffer, in the presence of which the enzyme is stable and active, which in can buffer a pH range of 4-9 and even in small amounts Allows lowering the pH in the desired range.
• the new mixture differs significantly from the buffered one Catalase mixtures, which are used for cleaning and storing contact lenses be used.
• buffers are added with the aim of to set the optimal pH for the enzymes.
• the person skilled in the art knows that the buffer concentrations used within the scope of the in the biochemical laboratory practice usual use amount of 20-200mM, for example emotional.
• Enzymes that are able to break down H 2 O 2 to H 2 O and O 2 are called catalases. They have an iron porphyrin ring and occur in all aerobic organisms (animals, plants and microorganisms). Organisms that live without oxygen often have no catalase.
• the catalase can be microbial, animal or vegetable Origin. It preferably comes from bacteria or fungi and is particularly preferred from the microorganism Aspergillus niger, as commercially available Catalases can very particularly preferably Terminox®, Terminox ultra®, Catazym® and Catalase T100® (manufacturer Genencor and Novo Nordisk) be used.
• buffers are able to buffer a pH range of 3-9.
• the one to be buffered is preferably located Range at 4-8.
• the following buffers can be used according to the invention, for example: Citrate, acetate, phosphate, formate, carbonate, tris-hydroxymethyl-aminomethane, Triethanolamine, imidazole, oxalate, tartrate, fumarate, maleinate, phthalate, succinate, Ethylenediamine and mixtures of several of them.
• Acetate, Phosphate and citrate are used as buffers.
• the invention is particularly preferably Mixture of a catalase and acetate.
• BU Baker Units
• KCIU Kilo Catalase International Units
• To standardize the different measurement methods was an activity determination as described below applied: 1000 ml of a standard bleaching liquor consisting of 1.25 ml / l sodium hydroxide solution 32%, 1.0 ml / l hydrogen peroxide 35% and 0.3 ml / l of a bleach stabilizer according to Example 6, at 40 ° C with stirring with a solution added from 4.9 ml of an acetate buffer of pH 5 and from a defined Amount of a commercially available catalase, e.g. 1.0 g, ordered.
• the acetate buffer will prepared by a 7M aqueous acetic acid solution with 45% sodium hydroxide solution is adjusted to a pH of 5.
• Catalase and buffer can be mixed in the following proportions (g / g): 1 Part of a commercial catalase and 1 to 100 parts of a highly concentrated one Buffer solution.
• the mixture according to the invention consists of either 1 part of Novo Terminox Ultra 10L® and 1.5 to 15 parts of a highly concentrated one Acetate buffer or 5 to 23 parts of a highly concentrated citrate buffer or but from 1 part Genencor Catalase T 100® and 5 to 40 parts one highly concentrated acetate buffer or 20 to 80 parts of a highly concentrated Citrate buffers. All parts are parts by weight.
• a highly concentrated buffer is one which can be produced by in the case of the acetate buffer a 5-16, preferably 7-15 M aqueous acetic acid solution with ammonium or an alkali hydroxide, e.g. Sodium hydroxide in the form a 45% aqueous solution, to a pH of 3 to 6, preferably 4 to 5.5, or in the case of the citrate buffer a 2-5, preferably 3-4 s aqueous citric acid solution with ammonium or an alkali hydroxide, such as e.g. Sodium hydroxide in the form of a 45% aqueous solution, to a pH of 3 to 6, preferably 4-5.5 is set.
• aqueous acetic acid solution with ammonium or an alkali hydroxide e.g. Sodium hydroxide in the form a 45% aqueous solution
• the usual quantities used for the mixture are between 0.5-10 g per liter Fleet.
• the peroxide bleaching of textile materials is usually in the temperature range from 80-100 ° C and a pH of 10-12.
• the amount of to be used Hydrogen peroxide depends, for example, on the amount of substrate, the whiteness to be achieved, the temperature and the amount of stabilizer used. These conditions are known to the person skilled in the art.
• the inventive method of the simultaneous removal of residual peroxide and the adjustment of the pH value to an optimal enzyme activity and to subsequent ones Treatment processes, such as dyeing, are carried out in one Temperature of 20-70 ° C, preferably 30-65 ° C carried out.
• a 10 molar aqueous acetic acid was initially charged and as long as 45% NaOH was added until a pH of 5 was reached. From this solution 9.4 parts by weight mixed with a part by weight of Catalase T100® (from Genencor).
• a 7-molar aqueous acetic acid was initially charged and as long as 45% NaOH was added until a pH of 5 was reached. From this solution 11.7 parts by weight mixed with a part by weight of Catalase T100® (from Genencor).
• a 7-molar aqueous acetic acid was initially charged and as long as 45% NaOH was added until a pH of 5 was reached. From this solution 3 parts by weight mixed with one part by weight of Terminox 10L® (from Novo Nordisk).
• a 4-molar aqueous citric acid was introduced and as long as 45% NaOH was added until a pH of 5 was reached. From this solution 27.2 parts by weight with one part by weight of Catalase T100® (from Genencor) mixed.
• a 4 molar, aqueous citric acid solution was presented and as long as 45% NaOH was added until a pH of 5 was reached. From this solution 7 parts by weight with one part by weight of Terminox Ultra 10L® (from Novo Nordisk) mixed.
• the liquor ratio was 1:10. After a treatment time of 45 min 98 ° C was cooled to 80 ° C, the bleach was drained and with cold water replenished to the original volume. At a temperature of 55 ° C and a pH of 10.8, 2.6 g / l of a product was added according to Example 1. After 10 minutes of treatment, the test showed Peroxide test sticks from Merck that neither in the fleet nor on the Cotton hydrogen peroxide was detectable. The pH in the fleet and on the fiber showed a value of 6.
• the liquor ratio was 1:10. After a treatment time of 45 min 95 ° C. was cooled to 80 ° C., the bleaching liquor was drained off and water was added replenished the original volume. This was followed by a rinsing step at 80 ° C. After draining the fleet and filling it with fresh water, one was carried out Temperature of 50 to 55 ° C and a pH of 10.6 the addition of 2.5 g / l of a product according to Example 2. After 10 minutes of treatment, the review showed with peroxide test sticks from Merck that neither in the fleet nor on which cotton hydrogen peroxide was detectable. The pH in the Brisk and on the fiber showed a value of 7.
• Samples of a buffer catalase mixture according to Example 1 or 3 were 3 months stored at 25 ° C. None of the samples showed precipitations or after this time Cloudiness.
• the activity of a buffer catalase mixture according to Example 1 or 3 was direct determined after production and after 3 months storage at 25 ° C.
• the Activity determination was carried out by using a bleaching liquor consisting of

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Textile Engineering (AREA)
• Enzymes And Modification Thereof (AREA)
• Detergent Compositions (AREA)
• Coloring Foods And Improving Nutritive Qualities (AREA)

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• 1996
  • 1996-10-14 DE DE19642325A patent/DE19642325A1/de not_active Withdrawn
• 1997
  • 1997-10-01 EP EP97117009A patent/EP0835927A3/fr not_active Withdrawn
  • 1997-10-09 JP JP9291851A patent/JPH10130696A/ja active Pending
  • 1997-10-14 TR TR97/01166A patent/TR199701166A2/xx unknown

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