Homogeneous mixtures of polyphosphates

Details Homogeneous mixtures of polyphosphates Homogeneous mixtures of polyphosphates

C - Chemistry, Metallurgy

01

B

23/62

C01B 25/41 (2006.01) C01B 25/39 (2006.01) C01B 25/42 (2006.01)

Patent

CA 1264407

HOMOGENEOUS MIXTURES OF POLYPHOSPHATES 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. -9-

501846

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