METHOD FOR MAKING PHOSPHATED ALKALINE SALTS, RESULTING SALTS AND SILICAS, AND DETERGENT OR FOODSTUFF CONTAINING SUCH SALTS

摘要

A method for making high-purity phosphated alkaline salts, particularly a tripolyphosphate, by reacting phosphoric acid with an aqueous solution of an alkaline silicate such as a sodium, potassium or lithium silicate, to give the corresponding phosphated salt along with micro-amorphous silica which retains most of the impurities contained in the phosphoric acid used, whereafter the resulting phosphated salt and silica are separated.