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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/042—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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/046—Salts
• • 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
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2075—Carboxylic acids-salts thereof
  • C11D3/2086—Hydroxy carboxylic acids-salts thereof

Definitions

• the present invention relates to a novel cleaning agent, in particular for dishwashers, and its use.
• these acids preferably citric acid and tartaric acid
• Liquid sanitary cleaning and decalcifying agents must also contain thickeners. Although such agents dissolve limescale well and are therefore well suited for cleaning plastic and / or cast iron and / or porcelain containers and pipes, these agents cannot be used for cleaning dishwashers because they admit the steel and other metal parts of this machine would attack heavily.
• citric acid in particular when used as a detergent in dishwashers, can also be activated by adding amidosulfonic acid and / or aluminum sulfate and that the aqueous solutions thus obtained have a practically non-corrosive effect on stainless steel surfaces.
• amidosulfonic acid and / or aluminum sulfate in order to ensure adequate wetting of the mostly fatty deposits, it is necessary to add surfactants to these agents, using appropriate, known, low-foaming, non-ionic surfactants to prevent excessive foaming.
• Amidosulfonic acid as a solid, odorless, almost non-toxic, non-hygroscopic acid, which dissolves very well in water and has a lime-dissolving effect, is very suitable for the activation according to the invention.
• Aluminum sulfate which also easily dissolves in water with an acidic reaction, has the advantage of being particularly environmentally friendly in addition to the good activation of citric acid as an inorganic compound.
• activation of citric acid is also observed with additions of 10-20%, optimal activation is observed with additions of 30 - 50%.
• the activation of citric acid is less apparent than the acidic effect of the compounds themselves, which leads to an undesired lowering of the pH values of the cleaning liquors in the case of amidosulfonic acid.
• the cleaners according to the invention are in the form of solid, granulated or powder detergents, but can also be brought into liquid form with water or aqueous alcohol for simple metering and handling.
• the cleaning agent is composed as follows: 50 parts of citric acid 30-50 parts of amidosulfonic acid and / or aluminum sulfate 0.1-6 parts of low-foaming, non-ionic surfactant and possibly 0-200 parts of water or aqueous alcohol.
• the cleaning agent can also contain 0.1-3, in particular 0.5-2, parts of colorants and / or fragrances and / or corrosion inhibitors.
• Adducts of ethylene oxide with alkylphenol with a low degree of ethoxylation have been used as suitable surfactants.
• Adducts of 1 - 7 moles of ethylene oxide, with native or synthetic fatty alcohols with 10 - 18 carbon atoms or adducts based on oxo alcohols or Adducts of 1-7 moles of ethylene oxide and 1-7 moles of propylene oxide with the corresponding alcohols, as well as ethylene oxide adducts with higher molecular propylene glycols or amines with molecular weights of 1000-3500 are also suitable.
• the most readily biodegradable derivatives of fatty alcohols or oxo alcohols with ethylene oxide and propylene oxide contents of 2-5 molecules per alcohol molecule are preferably used.
• the surfactants can be added in amounts between 0.1 and 6 parts, an amount of 0.5-2 parts has been found to be the most effective, since on the one hand an adequate fat solution and wetting is achieved and on the other hand the foaming remains minimal.
• the products according to the invention are concentrates which are diluted with water for the actual application.
• the acidic cleaners according to the invention dissolve and remove lime and cleaning agent residues and fatty soiling from dishwashers.
• the dissolution rate of the calcareous soiling becomes more appropriate compared to the use of pure citric acid Concentration increased to two to three times.
• the use of the activators also prevents the formation of poorly soluble calcium compounds.
• citric acid granulated anhydrous 38 percent by weight of amidosulfonic acid granulated 0.2 percent by weight fragrance 1.8% by weight nonionic surfactant based on alcohol of chain length C 13 / C 15, on which 4 moles of propylene oxide and 2 moles of ethylene oxide are attached.
• nonionic surfactant (adduct of 2 moles of ethylene oxide, 4 moles of propylene oxide with fatty alcohol, chain length 12-18 C atoms)
• Example 1 Interior optically bare
• Example 3 Interior optically bare
• Citric acid alone shows 10% citric acid / calcium carbonate in a system at 90 ° C with a precipitation of 1.75 g / l calcium carbonate.
• the addition of amidosulfonic acid or aluminum sulfate according to the invention greatly reduces the salt formation (precipitation) of calcium citrate.
• Example 1 is able under the same conditions to dissolve 3.8 g / l calcium carbonate as a 10% solution, Example 3 4.0 g calcium carbonate.

Landscapes

• 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)
• Inorganic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Emergency Medicine (AREA)
• Detergent Compositions (AREA)

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8195335

Family Applications (1)

Country Status (3)

Cited By (20)

Citations (5)

• 1986
  • 1986-08-12 EP EP86111182A patent/EP0256148A1/fr not_active Withdrawn
• 1987
  • 1987-08-11 ES ES8702365A patent/ES2004799A6/es not_active Expired
  • 1987-08-12 JP JP20010887A patent/JPS6399295A/ja active Pending

Patent Citations (5)

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