Preparation of granular sodium tripolyphosphate products

Details Preparation of granular sodium tripolyphosphate products Preparation of granular sodium tripolyphosphate products

1979-01-02

1981-03-10

Willis, Jr., P. E.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

423315, C01B 1516, C11D 716

Patent

active

042552745

ABSTRACT:
Dense rotary dried sodium tripolyphosphate (STPP) particles having a bulk density of at least 0.9 g/cc and a particle size distribution of 0 to 85% by weight +20 mesh, 15 to 100% by weight -20 +100 mesh and 0 to 20% by weight -100 mesh are moisturized by adding a sufficient amount of water to produce a material containing on the average between about 10% and about 30% by weight moisture. The moisturized material is calcined to a temperature within the range of from about 300.degree. to about 600.degree. C., to produce a granular STPP product having low friability, high absorptivity and a bulk density within the range of from about 0.65 to about 0.87 g/cc.

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patent: 3933670 (1976-01-01), Brill et al.
patent: 4134963 (1979-01-01), Pals

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