Preparation of white calcium phosphates from off- colored lime

Details Preparation of white calcium phosphates from off- colored lime Preparation of white calcium phosphates from off- colored lime

C - Chemistry, Metallurgy

01

B

23/68

C01B 25/32 (2006.01)

Patent

CA 1187675

ABSTRACT A process is described for providing food grade calcium phosphate having an acceptably white color and purity level by reacting food grade phosphoric acid and an off-colored lime in the presence of from 0.01% to 0.3% of hydrogen peroxide, based on the amount of lime used, whereby the hydrogen peroxide bleaches the resulting calcium phosphate into an acceptably white product.

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