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
  • C11D17/0047—Detergents in the form of bars or tablets
  • C11D17/0052—Cast detergent compositions
• • 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

Definitions

• a disadvantage is the use of cleaning agents that tend to clump or cake when exposed to moisture, especially in automatic, stocking dosing devices that are used in large numbers in the area of large-scale commercial use of single-tank and multi-tank dishwashers.
• cleaning agents that tend to clump or cake when exposed to moisture
• the only remedy is to prevent the entry of moisture into the storage container, but this cannot be guaranteed in a damp kitchen atmosphere or after cleaning the device with water without special drying of the parts of the storage container and the dosing device.
• the clumping or caking of alkaline cleaning agents can be avoided, inter alia, by producing them in block form from the outset and packaging, distributing and using them in a moisture-proof manner.
• melt-block detergents for automatic dishwashing have already been described, which are mixed together by mixing all alkaline-reacting, preferably hydrate-containing active substances, such as. B. sodium silicates, pentasodium triphosphate, sodium hydroxide and optionally water, if the preferred water of hydration of the compounds mentioned is not sufficient, and then mild heating of the mixture with stirring to 90 to 100 ° C. until a uniformly molten mass was obtained and cast in molds and solidified to form a dense crystal aggregate.
• active substances such as. B. sodium silicates, pentasodium triphosphate, sodium hydroxide and optionally water
• a continuous mixer those can be used which are also suitable for the production of suspensions or pastes. Preferred are those which bring about a homogeneous distribution of the pentasodium triphosphate in the melt with short residence times of less than one minute and the narrowest possible residence time spectrum, for example an injection mixer from FMC.
• the feed and discharge lines of the mixer are heated so that their internal temperatures are 50 to 75 ° C and correspond to those of the melt. At higher temperatures, partial degradation of the active chlorine carrier is to be feared others also favor the phosphate breakdown in the melt after pouring into the molds. Lower temperatures can lead to at least partial crystallization of the melt in the batching tank, the metering units, the pipelines or the mixer and thereby cause technical malfunctions.
• Alkali silicates in particular are alkali metal silicates, namely water-free, but advantageously in the form of sodium metasilicate. 9 H20, sodium metasilicate. 6 H20 and sodium metasilicate. 5 H20 used.
• the amounts used in the particular form are 0 to 60, preferably 0 to 50,% by weight, based on the total composition. But you can also partially or completely replace the alkali metal silicates with water glass solutions, the ratio of Na20: Si02 1: 1 to 1: 4, preferably 1: 2 to 1: 3.5. Because of the higher silicate content of the water glass, its solutions are used in amounts of 0 to 30, preferably 0 to 15% by weight, based on the total agent.
• Organic complexing agents which can be solubility-improving constituents of the melt-block-shaped cleaning agents are polycarboxylic acids, hydroxycarboxylic acids, aminocarboxylic acids, carboxyalkyl ethers, polyanionic polymers, in particular polymeric carboxylic acids and phosphonic acids traditional, these compounds are used in the form of their water-soluble salts.
• the blocks are then no longer composed homogeneously, so that a dosage according to the recipe is not guaranteed during use (gradual rinsing of the blocks).
• the weight ratio of the two types of phosphate to one another can vary within wide limits. In the case of highly alkaline formulations, ratios of coarse-grained to fine-grained phosphate of approximately 10: 1 to 2: 1, preferably 6: 1 to 3: 1, have proven successful. In the case of low-alkaline formulations, degrees of phosphate maintenance of more than 90% are already achieved even with fine-grained phosphate. A total of 2 to 50, preferably 5 to 45% by weight of pentaalkali phosphate are used.
• the solidification process of the melts obtained by the process according to the invention takes from a few minutes to about one hour, depending on the size of the mold and the composition of the mass. Depending on their composition, the finished melting blocks are very hard, hard or less hard, but in any case through and by consistently composed and quickly soluble in use.
• a mixture consisting of 10 parts by weight of water glass N (Na20: Si02 1: 3.35; 34.5%), 8 parts by weight of NaOH (50%), 35 parts by weight of NaOH prills and 11 parts by weight of MCAS solution (Na salt of monochloramidosulfonic acid, made up in NaOH) prepared, the addition of the active chlorine-releasing compound being carried out at a temperature below 70 ° C., and adjusted to 67 ° C. At this temperature, the melt was conveyed into the heated FMC mixer (speed of the mixing spiral 800 rpm, speed of the powder spiral 800 rpm). With a total throughput of approx.
• a melt consisting of a mixture was made while increasing the temperature to 62 ° C 32 parts by weight of sodium metasilicate nonahydrate 4 parts by weight of NaOH prills 11 parts by weight of MCAS solution 22 parts by weight of sodium metasilicate, anhydrous receive.
• the water-free metasilicate only partially dissolved in this recipe during the stirring time of approx. 30 minutes. The undissolved portion was suspended.
• the melt was fed into the FMC mixer at 62 ° C., mixed there with 31% by weight of finely divided pentasodium triphosphate and poured off in 1 kg portions. After cooling and solidification, a degree of phosphate retention of about 90% was determined.

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)
• Detergent Compositions (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=6311618

Family Applications (1)

Country Status (6)

Cited By (4)

Families Citing this family (10)

Citations (3)

Family Cites Families (5)

• 1986
  • 1986-10-13 DE DE19863634812 patent/DE3634812A1/de not_active Withdrawn
• 1987
  • 1987-10-05 DE DE8787114488T patent/DE3777318D1/de not_active Expired - Fee Related
  • 1987-10-05 EP EP87114488A patent/EP0264043B1/fr not_active Expired - Lifetime
  • 1987-10-05 ES ES198787114488T patent/ES2029467T3/es not_active Expired - Lifetime
  • 1987-10-05 AT AT87114488T patent/ATE73487T1/de active
  • 1987-10-09 US US07/107,235 patent/US5064554A/en not_active Expired - Fee Related
• 1992
  • 1992-05-18 GR GR920400977T patent/GR3004644T3/el unknown

Patent Citations (3)

Also Published As

Similar Documents

Legal Events