Homogeneous mixtures of polyphosphates

Details Homogeneous mixtures of polyphosphates Homogeneous mixtures of polyphosphates

1985-03-04

1989-01-17

Stoll, Robert L.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423305, 423312, 423314, C01B 1516, C01B 2526

Patent

active

047987120

ABSTRACT:
A homogeneous, particulate mixture of alkali metal pyrophosphates and tripolyphosphates is prepared by flash drying an aqueous solution of alkali metal orthophosphates having an alkali metal to phosphorus mole ratio in the range of 5:3 to 6:3, and calcining the resultant dried particles. Preferably, the alkali metal is sodium and the orthophosphate solution is adjusted to provide a major proportion of sodium pyrphosphate and a minor proportion of sodium tripolyphosphate in the final product.

REFERENCES:
patent: 2776187 (1957-01-01), Pfrengle

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