Sodium tripolyphosphate with a high absorptionsvermoegen and method for its production

摘要

High absorbtivity sodium tripolyphosphate is prepared by moisturizing the anhydrous orthophosphate particles produced by spray- drying an aqueous solution of sodium phosphates during the production of sodium tripolyphosphate. Following moisturization, the hydrated particles are calcined at a temperature within the range of from about 300° C. to about 600° C. to produce a granular sodium tripolyphosphate product having an absorbtivity value of at least about 30%.