| 摘要 |
PROBLEM TO BE SOLVED: To provide an anion exchange resin of a salt type which has a extremely low metal content. SOLUTION: Chloromethyl ether is reacted in the presence of Lewis acid like zinc chloride with a styrene-divinyl benzene crosslinked copolymer and is chloromethylated. Trimethylamine, etc., are reacted therewith to form the anion exchange resin. This resin is cleaned with an aqueous hydrochloric acid solution, by which the metal content thereof is lowered down to <=100 ppm. |
