Type B aluminosilicates with low Si:Al ratio for detergent use

Details Type B aluminosilicates with low Si:Al ratio for detergent use Type B aluminosilicates with low Si:Al ratio for detergent use

1993-02-02

1994-12-20

Skane, Christine

Compositions

Water-softening or purifying or scale-inhibiting agents

252174, C11D 312, C11D 1706

Patent

active

053743709

ABSTRACT:
Aluminosilicates in the form of P type zeolites are used as detergency builders and have a silicon to aluminium ratio not greater than 1.33, preferably above 0.9. These zeolites will usually have a calcium binding capacity of at least 150 mg CaO per gram of anhydrous aluminosilicate. A preferred form of the zeolite P has a silicon to aluminium ratio up to 1.15, and preferably above 0.9, with a tetragonally distorted cubic crystal structure. A process of the preparation of these zeolite P builders is described.

REFERENCES:
patent: 3008803 (1961-11-01), Milton
patent: 3112176 (1963-11-01), Haden
patent: 3535075 (1970-10-01), Ueda
patent: 4180485 (1979-12-01), Llenado
patent: 4265777 (1981-05-01), Boyer
patent: 4275048 (1981-06-01), Stein
patent: 4405483 (1983-09-01), Kuzel
patent: 4770815 (1988-09-01), Baker
W. C. Beard: "Molecular Sieve Zeolites-I, Advances in Chemistry Series 101", pp. 237-249 (1971).

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