Detergent compositions containing calcium pyrophosphate as an an

Details Detergent compositions containing calcium pyrophosphate as an an Detergent compositions containing calcium pyrophosphate as an an

1988-07-12

1989-12-19

Lieberman, Paul

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

252133, 25217414, 25217416, 252181, 252DIG15, 252DIG17, 423306, 423307, C02F 508, C02F 514, C11D 306, C11D 310

Patent

active

048881236

ABSTRACT:
A detergent composition contains a detergent active material, a carbonate builder, such as sodium carbonate, and a calcium containing compound ideally selected from specific calcium pyrophosphates, as an antideposition agent. The latter is characterized by a defined calcium influence test. Preferred calcium pyrophosphate compounds may be made by mixing solutions of calcium chloride and sodium dihydrogen pyrophosphate at a pH of less than 3.6 and removing the precipitate which forms.

REFERENCES:
patent: 2631102 (1953-03-01), Hubbard et al.
patent: 3028217 (1962-04-01), Brown
patent: 3875289 (1975-04-01), Kim
patent: 3939100 (1976-02-01), Hau et al.
patent: 3957695 (1976-05-01), Davies et al.
patent: 3985675 (1976-10-01), Kim
patent: 4007124 (1977-02-01), Collier et al.
patent: 4019998 (1977-04-01), Benson et al.
patent: 4362642 (1982-12-01), Carter et al.
Chemical Abstracts, vol. 78, 1973, p. 277, abstract #134915w, Savent et al., "Reaction Products of Applied Pyrophosphates in Some Manitoba Soils".
Savent et al., vol. 95, 1981, p. 549, abstract #5660m.
Yadav et al., "Formation of Reaction Products from Potassium Pyrophosphophate Fertilizer in Soils W/Special Reference to the Effects of Zinc & Manganese Application".
Yadav et al, vol. 105, 1986, p. 451, abstract #4626t, Nagasawa et al., "Hydrolysis & Precipitate Formation of Diphosphate Ion in the Presence of Calcium Ion".
Research Disclosure 17167, Jul. 1978.

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