Production of low density granular sodium tripolyphosphate

Details Production of low density granular sodium tripolyphosphate Production of low density granular sodium tripolyphosphate

1976-12-06

1979-01-16

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423305, C01B 1516, C01B 2526

Patent

active

041349636

ABSTRACT:
Finely divided sodium tripolyphosphate (STPP) particles are sprayed with water in an amount from about 36% to about 130% in excess of the amount stoichiometrically required for formation of sodium tripolyphosphate hexahydrate to form an agglomerated product which is then calcined to a temperature within the range of from about 320.degree. C to about 550.degree. C to produce a granular sodium tripolyphosphate product of low bulk density and low frangibility.

REFERENCES:
patent: 3054656 (1962-09-01), Cassidy et al.
patent: 3356447 (1967-12-01), Tafler
patent: 3650685 (1972-03-01), Dyer et al.
patent: 3761573 (1973-09-01), Hinz et al.
patent: 3932590 (1976-01-01), Pals et al.

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