PRODUCTION OF CONCENTRATED AQUEOUS POLYPHOSPHATE SOLUTIONS

摘要

A concentrated aqueous alkali metal polyphosphate solution is prepared by adding polyphosphoric acid having a P2O5 assay of about 82% to about 85% to a quantity of concentrated aqueous alkali metal hydroxide sufficient to neutralize the acid. The resulting polyphosphate solution is richer in pyrophosphate and tripolyphosphate moieties than the acid.