Manufacture of sodium tripolyphosphate

Details Manufacture of sodium tripolyphosphate Manufacture of sodium tripolyphosphate

C - Chemistry, Metallurgy

01

B

C01B 25/40 (2006.01) C01B 25/41 (2006.01)

Patent

CA 2384286

A process for producing sodium tripolyphosphate includes mixing sodium hydroxide or sodium carbonate with dilute phosphoric acid in amounts which are substantially stoichiometric for the production of sodium tripolyphosphate to produce an intermediate crystalline mix in a sludge. The intermediate crystalline mix is separated from the sludge, and melted in a vessel to cause sodium tripolyphosphate to be produced. The molten sodium tripolyphosphate is removed from the vessel, and cooled to produce solid sodium tripolyphosphate.

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