| 摘要 |
PURPOSE: To prepare economically an ion exchange resin used as a catalyst when bisphenol A is produced by using a strongly acidic sulfonic acid type ion exchange resin wherein N,N,N-trimethyl-3-mercaptopropylammonium is ionically bound. CONSTITUTION: As a catalyst for producing bisphenol A, a strongly acidic ion exchange resin consisting of a styrene-divinylbenzene copolymer prepd. by binding ionically N,N,N-trimethyl-3-mercaptopropylammonium and being sulfonated, is used. In this case, N,N,N-trimethyl-3-mercaptopropylammonium is synthesized by reacting hydrochloric acid salt of N,N-dimethyl-3-chloropropylamine with sodium thiosulfate to prepare a Bunte salt, decomposing this to synthesize disulfide of N,N-dimethyl-3-mercaptopropylamine, performing methylation with a methylation agent and reducing it furthermore. |
