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
  • C11D3/3958—Bleaching agents combined with phosphates
• • 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
  • C11D3/06—Phosphates, including polyphosphates
• • 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
  • C11D3/08—Silicates

Definitions

• the invention relates to an alkaline and chlorine-stable cleaning agent which is preferably suitable for use in dishwashers and which contains, as an essential constituent, mixed granules which consist predominantly of phosphates, silicates and auxiliaries.
• Dishwashing detergents and cleaning agents for cleaning equipment in the food industry usually contain alkali phosphates, preferably sodium triphosphate, alkali silicates, carbonates, bicarbonates, hydroxides, low-foaming nonionic surfactants, oxidative bleaching agents, in particular active chlorine-releasing compounds, and corrosion inhibitors and chlorine stabilizers.
• alkali phosphates preferably sodium triphosphate
• alkali silicates preferably sodium triphosphate
• carbonates preferably bicarbonates
• hydroxides low-foaming nonionic surfactants
• oxidative bleaching agents in particular active chlorine-releasing compounds
• corrosion inhibitors and chlorine stabilizers oxidative bleaching agents
• the function of the individual detergent components is that sodium phosphate binds the water hardness complex, while alkali silicates corrode the dishes, e.g. Prevent glasses, porcelain, cutlery, stainless steel materials and the like to a large extent.
• Alkali carbonates, bicarbonates and hydroxides increase the cleaning effect of the detergents and free the dishes, especially vegetable and animal fats.
• color stains such as B. tea, coffee, fruit and vegetable juices removed from the wash ware, while surfactants increase the wettability of the wash ware.
• Modern dishwashing detergents do not have to be dusty, free-flowing and quickly soluble in water. They must also be a product that can be easily and completely rinsed out from the dosing devices of dishwashers and have a high storage stability in relation to active chlorine-releasing compounds.
• cleaning agents In order to improve the ability of the detergent to be rinsed out of the metering devices and to prevent the products from caking, commercially available cleaning agents preferably contain partially hydrated raw materials, or they are granulated using water.
• the cleaning agent contains hygroscopic components such as e.g. B. alkali silicate contains.
• Granulation of the alkali silicates with sodium tripolyphosphate according to the process of DE-AS 2 454 448 is not sufficient to eliminate the above-mentioned disadvantage of the alkali silicates, since in the granulate, i. H. even on the surface of the granulate particles, the granulate constituents are homogeneously distributed and water absorption of the silicate is not thereby prevented. In this case too, the granules tend to cake.
• a partial solution to the problem indicated above is the granulate disclosed in DE-AS 2 822 765. It is a granulated raw material for dishwasher, degreasing and cleaning agent preparations, which essentially consists of sodium or potassium silicate and tripolyphosphate , and in which the silicate is protected against contact with moisture, C0 2 , surfactants, chlorine-containing bleaches and other constituents of the final preparation, which furthermore does not lead to the precipitation of fog-forming, slightly soluble calcium silicates when dissolved in hard water, which is characterized in that that it consists of an inner silicate core and an outer layer of at least partially hydrated tripolyphosphate, the degree of hydration being determined by the amount of water required to coat the silicate grains with tripolyphosphate.
• the known granulate is considered advantageous as a component of detergent formulations, because e.g. when using hard water in the dishwasher, the primarily dissolving tripolyphosphate binds the hardness formers of the water in a complex manner and thus prevents the subsequent formation of poorly soluble calcium and magnesium silicates from the substance of the granulate core.
• the granules of DE-AS 2 822 765 have the disadvantage. that it consists of only two components, namely an alkali silicate and a tripolyphosphate.
• an alkali silicate e.g. for the food industry
• the well-known granulate is not sufficient on its own.
• dish detergents with a higher alkalinity must be used.
• the low-foaming surfactant is a nonionic wetting agent, which can be produced, for example, from ethylenediamine, ethylene oxide and propylene oxide and the chlorine-releasing compound sodium dichloroisocyanurate with two water of crystallization.
• the product B suitable for producing the co-granules is a mixture of preferably about 70% by weight sodium metasilicate, about 10% by weight sodium hydroxide and about 20% by weight sodium carbonate
• the product C is a mixture of about 90% by weight. -% sodium metasilicate, about 5 wt .-% water and about 5 wt .-% sodium carbonate.
• the co-granules and / or the products according to B and / or C can be produced, for example, by the fluidized bed process.
• Products A, B and C are advantageously used in granular form for treatment with sodium tripolyphosphate and water.
• the cleaning agent mixture according to the invention can also contain additions of trisodium phosphate or sodium sulfate in an amount of up to 50% by weight.
• the detergent mixture of the invention is technically advanced compared to the relevant known products in that it ensures an optimal cleaning effect due to the structure and composition of the co-granules, and alkali-sensitive surfactants and active chlorine-releasing substances in a mixture despite the presence of strongly alkaline compounds, such as sodium hydroxide and / or sodium carbonate , do not decompose prematurely.
• a granulate was formed which had the following composition: 14.7 kg of this granulate were further treated in the same apparatus by adding 11.5 kg of dry, finely ground sodium tripolyphosphate and 7.5 kg of a 20% by weight sodium tripolyphosphate suspension. 250 m 3 / h of vortex air at a temperature of 150 ° C were used. The result was a hard, abrasion-resistant co-granulate with the following composition:
• the mixed granules consisted of sodium metasilicate and sodium tripolyphosphate in a weight ratio of 1: 1 and were produced by the process of DE-AS 2454448.
• the mixed granules consisted of sodium metasilicate and sodium tripolyphosphate in a weight ratio of 1: 1 and were produced by the process of DE-AS 2 822 765.

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)
• Detergent Compositions (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=6141949

Family Applications (1)

Country Status (9)

Family Cites Families (2)

• 1981
  • 1981-09-17 DE DE19813136985 patent/DE3136985A1/de not_active Withdrawn
• 1982
  • 1982-08-25 AT AT82107785T patent/ATE28756T1/de not_active IP Right Cessation
  • 1982-08-25 EP EP82107785A patent/EP0075125B1/de not_active Expired
  • 1982-08-25 DE DE8282107785T patent/DE3276908D1/de not_active Expired
  • 1982-09-15 GR GR69278A patent/GR77336B/el unknown
  • 1982-09-15 TR TR22085A patent/TR22085A/xx unknown
  • 1982-09-15 PT PT75563A patent/PT75563B/pt unknown
  • 1982-09-16 DK DK414782A patent/DK414782A/da not_active Application Discontinuation
  • 1982-09-16 NO NO823145A patent/NO823145L/no unknown
  • 1982-09-17 ES ES515799A patent/ES8306387A1/es not_active Expired

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