Patent ID: 11965089
Assignee: BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 22:
23. The method according to claim 10, wherein the ionomer is cross-linked maleic acid ester ionomer microsphere, and the method comprises:
(1) subjecting maleic anhydride and a monomer MB represented by formula (I) to copolymerization reaction in the presence of an initiator, a cross-linking agent, and a reaction solvent, in a copolymerization unit, to obtain a polymer mother liquid containing maleic anhydride-based copolymer microspheres,, wherein R is H or methyl;
(2) subjecting the polymer mother liquid to a continuous first separation to obtain a separated solid-containing phase and a separation liquid-I;
(3) feeding the separated solid-containing phase into a washing unit, for performing at least one alcohol washing and a continuous second separation, to obtain a copolymer slag phase and a washing clear liquid;
(4) reacting the copolymer slag phase with an alcohol solution of a base, and continuously subjecting the obtained product to a third separation, to obtain a centrifuged slag phase containing ionomer microspheres and a separation liquid-II;
(5) sending the centrifuged slag phase to a drying unit for drying, to obtain cross-linked maleic acid ester ionomer microspheres; and
(6) introducing the separation liquid-I, separation liquid-II and washing clear liquid to a solvent recovery unit, and returning the recovered solvent and recovered alcohol obtained by recovery to steps (1) and (3), respectively.