Process for preparing sodium tripolyphosphate

Details Process for preparing sodium tripolyphosphate Process for preparing sodium tripolyphosphate

1989-11-29

1991-04-02

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423305, C01B 1516, C01B 2526

Patent

active

050045890

ABSTRACT:
There is disclosed a process from producing granular sodium tripolyphosphate of predetermined particle size by means of calcining sodium orthophosphate dried from water solution and milled to a predetermined particle size. The tripolyphosphate is produced having approximately the same particle size distribution as the orthophosphate feed. Moisturizing the feed prior to calcining increases the assay of the product.

REFERENCES:
patent: 3233967 (1966-02-01), Shen
patent: 3338671 (1967-08-01), Marshall et al.
patent: 3660342 (1967-12-01), Pals
patent: 3761573 (1973-09-01), Hinz et al.
patent: 3932590 (1976-01-01), Pals et al.
patent: 4790983 (1988-12-01), Saran
patent: 4800055 (1989-01-01), Klee et al.

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