Homogenous mixtures of polyphosphates

Details Homogenous mixtures of polyphosphates Homogenous mixtures of polyphosphates

1988-08-10

1989-09-19

Doll, John

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423312, C01B 1516, C01B 2526

Patent

active

048679585

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 pyrophosphate and a minor proportion of sodium tripolyphosphate in the final product.

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

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