Patent ID: 9156933
Filing Date: 2015-10-13
Classification: B01J,C08F,C08J

Abstract:
1. A method of preparing a cation exchange membrane, the method comprising: mixing in an aqueous solution comprising water and a water-soluble alcohol: to form a reaction solution, wherein the monomer and the cross-linking agent are soluble in the reaction solution; wherein the monomer and the cross-linking agent are mixed in a molar ratio ranging from 0.5:1 to 2.0:1 (monomer:cross-linking agent); the polymerization initiator is added in a molar ratio ranging from 0.0025:1 to 0.02:1 (mols of polymerization initiator:total mols of monomer and cross-linking agent); and the aqueous solution comprises water and the water-soluble alcohol in a weight ratio ranging from 1.0:1 to 3.0:1 (water:water-soluble alcohol); placing the reaction solution on a backing cloth; polymerizing the monomer and cross-linking agent to form a polymer sheet; and converting the sulfonic acid group to a sulfonate functional group for forming the cation exchange membrane.