Process for preparing anhydrous polyphosphate mixed alkali metal

Details Process for preparing anhydrous polyphosphate mixed alkali metal Process for preparing anhydrous polyphosphate mixed alkali metal

1993-05-03

1994-04-12

Langel, Wayne

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 2530

Patent

active

053023633

ABSTRACT:
There is disclosed a process for preparing mixed alkali metal salts of tripolyphosphate. A solution of mixed orthophosphate salts, such as sodium and potassium is dried by spraying the mixture onto a hot tumbling bed of a mixture of phosphate salts. The dried salts are then calcined at a temperature in the range of from about 350.degree. C. to about 600.degree. C., preferably above 500.degree. C. to form the mixed alkali metal salt of tripolyphosphate.

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Van Wazer; Phosphorus and Its Compounds; 1958, pp. 608-611.

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