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
  • C11D3/395—Bleaching agents
• • 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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/395—Bleaching agents
  • C11D3/3956—Liquid compositions

Definitions

• This invention relates to a cleaning agent based on active chlorine and alkali.
• cleaning agents are used in practice for cleaning pipes and ducts and the like, for instance of apparatuses for milk processing.
• the cleaning occurs at 40 - 45°C and accordingly, the mixture should be preheated at a suitable temperature.
• no surfactants other than wetting agents are incorporated in such mixtures, because otherwise too much foaming would occur, particularly at the elevated temperatures and the intensive mechanical action, which accordingly would influence the cleaning action rather in a disadvantageous than in an advantageous way.
• Such cleaning agents should be well discerned from the so-called thickened bleach compositions, such as disclosed in GB-A-2,076,010A and EU-A-0,072,600 which contain much more hypochlorite solution than alkali (vide page 2, line 25 of EU-A-0072600) and wherein the added surfactant serves for thickening the composition.
• the present compositions are intended for industrial use and contain alkali metal hydroxide in an amount of at least 50 % of the bleaching agent.
• this invention relates to cleaning agents on the basis of active chlorine and alkali which are characterized by the fact that they also contain a minor amount of a compound of the formula wherein M is sodium or potassium and n is a number having an average value of 1 - .10.
• the present surfactants are known per se and belong to a group of compounds which is already known for a long time for its useful properties. However, within this group of compounds the C 8 H 17 -compounds have always been considered to constitute more or less a borderline case, and compounds derived from larger hydrophobic residues were always preferred. This appears not only from the above-mentioned U K-A-2,076,010 which, although stating that the hydrophobic residue may be a.o. a C 6-20 alkyl residue, states a preference for C 12 -C 13' and from EU-A-0,072,600 which mentions as hydrophobic group a.o.
• the alkyl group C 8 H 17 may be a straight chain or branched group, for instance n-octyl or 2-ethylhexyl.
• the free acid into the composition containing the active chlorine and alkali, so that the desired salt is formed in situ.
• other salts such as the ammonium salt or organic ammonium and amine salts, but of course in actual practice one uses preferably a salt of the ethercarboxylic acid with the same anion as in the alkali metal hydroxide component of the base mixture.
• the other components in the system are the usual ones for this kind of compositions.
• the alkali is KOH or NaOH and the concentration thereof can be varied within relatively wide limits, generally between 20 to 250 g per liter. A suitable concentration is in the order of 80 - 120 g per liter.
• the active chlorine in the system can be derived from various usual compounds. Chlorine- containing bleaching lye is a cheap product, and therefore this is generally used. However, a compound like trichlorocyanuric acid or chloramine T can also be used as chlorine-producing agents. Usually, the system contains about 3 - 6 % of active chlorine, preferably about 4.5 %.
• the amount of alkali in such systems is at least 50 % of the amount of bleaching agent-
• the amount of surfactant to be used according to the present invention can best be expressed in the weight ratio between surfactant and active chlorine. This weight ratio generally can vary from 1:10 to 1:3. Thus it is suitable to use 0.65 % of the present surfactant with the above-mentioned preferred amount of 4.5 % of active chlorine.
• a number of mixtures were prepared, containing 30.0 % hypochlorite bleaching agent (150 g chlorine/liter), 20.0 % of 50 % aqueous potassium hydroxide, the percentages of ethercarboxylic potassium salts stated hereinbelow, and the remainder water.
• the used ethercarboxylic salts had the formula octyl-O-(C 2 H 4 ) n -CH 2 COOK.
• a foaming test was carried out by dissolving 10 grams of each product in 1 liter of tap water (German hardness about 20°), shaking 50 ml of this solution vigorously by hand in a shaking cylinder of 100 ml, and reading the foam volume after 1 minute. In this experiment a foam volume of 15 ml or less is considered satisfactory.
• the results of these experiments have been rendered in the following table.
• Examples IX and XI were prepared again, but this time with NaOH. These compositions are named Examples IXa and XIa. They were also subjected to the above foaming test, and this at 12°C and 20°C. The results have been rendered hereinbelow, and for the sake of clarity the corresponding results with KOH from the above table have been reiterated here.

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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)

Applications Claiming Priority (2)

Publications (3)

Family

ID=19841642

Family Applications (1)

Country Status (5)

Cited By (6)

Family Cites Families (4)

• 1983
  • 1983-03-31 NL NL8301168A patent/NL8301168A/nl not_active Application Discontinuation
• 1984
  • 1984-03-28 DE DE8484200461T patent/DE3479037D1/de not_active Expired
  • 1984-03-28 EP EP19840200461 patent/EP0121286B1/fr not_active Expired
  • 1984-03-28 CA CA000450680A patent/CA1222427A/fr not_active Expired
  • 1984-03-29 DK DK172184A patent/DK160103C/da not_active IP Right Cessation

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