Continuous process for phosphorylating starch

Details Continuous process for phosphorylating starch Continuous process for phosphorylating starch

C - Chemistry, Metallurgy

08

B

260/221.1

C08B 31/06 (2006.01)

Patent

CA 1118773

ABSTRACT CONTINUOUS PROCESS FOR PHOSPHORYLATING STARCH Starch is phosphorylated by a virtually pollution-free, continuous process whereby an aqueous reagent solution of a tripolyphosphate, orthophosphate or pyrophosphate salt or a mixture thereof is sprayed onto a moist starch cake on a rotary vacuum filter in an amount suffi- cient to achieve efficient impregnation of the starch cake without losing significant levels of salt to the effluent. In a preferred embodiment, the reagent solution contains alkali metal tripolyphosphate salt and is obtained by diluting a concentrated solution thereof. The thus-impregnated starch is subsequently dried and heat-reacted by known procedures to produce an orthophosphate starch monoester.

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