Abstract
A phosphoric acid cation exchanger having an exchange capacity of 3.5 mg-equiv/g and a mechanical strength of 95% was prepared based on a graft copolymer of asphaltite and styrene using chloromethylation and then phosphorylation reactions. A number of metal chloride catalysts and the reaction kinetics of phosphorylation were studied. It was found that the resulting phosphoric acid cation exchangers are more stable than analogous commercial materials.
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