METHOD OF MANUFACTURING GRANULAR POLYMER, METHOD OF MANUFACTURING ION-EXCHANGE RESIN, AND METHOD OF MANUFACTURING SYNTHETIC ADSORBENT, AS WELL AS ANION-EXCHANGE RESIN AND CATION-EXCHANGE RESIN

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a granular polymer that is used for an ion-exchange resin and a synthetic adsorbent and suppresses remaining of impurities and generation of decomposed matters.

SOLUTION: The method of manufacturing a granular polymer includes: a first step in which polymerization is performed not by a seed polymerization method, and at least a part of the polymerization reaction is performed at a temperature of 100°C or higher; and a second step in which the polymerization reaction is performed at a temperature of 115°C or higher after the first step, wherein a conversion ratio of a raw material monomer before raising the temperature to 100°C is 70% or more, and an oxygen amount in the polymerization reaction system in the respective steps is 5 ppm or less in terms of a value of the ratio to the monomer.

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