Preparation of granular sodium tripolyphosphate products

Details Preparation of granular sodium tripolyphosphate products Preparation of granular sodium tripolyphosphate products

C - Chemistry, Metallurgy

01

B

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C01B 25/24 (2006.01) C01B 25/41 (2006.01)

Patent

CA 1115482

ABSTRACT: PREPARATION OF GRANULAR SODIUM TRIPOLYPHOSPHATE PRODUCTS Dense rotary dried sodium tripolyphosphate (STPP) particles having a bulk density of at least 0.9 g/cc and 2 particle size distribution of 0 to 85% by weight +20 mesh, 15 to 100% by weight -20 +100 mesh and 0 to 20% by weight -100 mesh are moisturized by adding a sufficient amount of water to produce a material contain- ing on the average between about 10% and about 30% by weight moisture. The moisturized material is calcined to a temperature within the range of from about 300 to about 600°C, to produce a granular STPP product having low friability, high absorptivity and a bulk density within the range of from about 0.65 to about 0.87 g/cc.

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