Abstract: The research progress on preparation of sulfonated polystyrene (SPS) and synthesis of new fatty acid sulfonic acid resin was introduced. The common sulfonating agents included sulfuric acid, sulfur trioxide (SO3), and chlorosulfonic acid. When chlorosulfonic acid was used, the reaction time could be shortened from 3 h to about 30 min, the sulfonation degree of PS could be controlled, the post-treatment processing was simplified, and the amount of waste acid the cost of production could be largely reduced.

Key words: sulphonated polystyrene, sulfonating agent, chlorosulfonic acid, sulfuric acid, sulfur trioxide, fatty sulfonic acid resin