Swelling-agent-free production method of macroporous ion exchange resin

Abstract

The invention belongs to the technical field of ion exchange resin, and particularly relates to a swelling agent-free production method of macroporous ion exchange resin. The solid wax and the polystyrene resin are used as composite pore-foaming agents, so that the pore diameter uniformity is improved; the methylene bisacrylamide is used as a cross-linking agent, so that the stability of a cross-linking structure is improved, the network aperture is increased, the structural compactness and the acid-base seepage pressure resistance of the product can be improved, and the purpose of improving the strength can be achieved; meanwhile, sulfonation treatment is combined, high-concentration sulfuric acid is used, the sulfonation reaction can be rapidly carried out, and the reaction time is shortened; and finally, through cooperation of a multi-gradient concentration step-by-step acid nesting technology, the swelling-agent-free macroporous ion exchange resin is obtained, and the performance of the swelling-agent-free macroporous ion exchange resin is not weaker than that of conventional swelling-agent-added resin. The technical problem that the resin is prepared without using a swelling agent is solved, the problems that tetrahydrofuran or dichloroethane residues are harmful to human bodies and pollute the environment are solved from the source, and the method has wide market application prospects.

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