Abstract
Abstract The degradation of highpolyphosphates in the coacervates of magnesium and calcium is discussed on the basis of the results of viscosity measurement and paper chromatographic analysis of highpolyphosphates. The initial viscosity and transparency of some magnesium coacervates were maintained with little change at 30 °C for about 2 weeks, while most calcium coacervates changed within 10 days into wet cakes containing Ca(H2PO4)2·H2O and Ca3(HP2O7)2·4H2O. The formation of pyrophosphates during the course of degradation of both coacervates is remarkable as compared with that on the hydrolysis of alkali highpolyphosphates in aqueous solutions.
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