Patent ID: 9522879
Filing Date: 2016-12-20
CPC Classification: C07C,C07D,C08G,G02B

Claim Text:
1. A method for preparing a polythiol compound from epichlorohydrin as a starting material, the method comprising: reacting epichlorohydrin with hydrogen sulfide to obtain bis(3-chloro-2-hydroxypropyl)sulfide; reacting a 2-mercaptoethanol salt with the bis(3-chloro-2-hydroxypropyl)sulfide to obtain a polyol compound; adding hydrochloric acid and thiourea to the polyol compound, stirring the mixture under heating, cooling the reaction mixture to room temperature, and adding a basic aqueous solution to the reaction mixture to hydrolyze the reaction product; and washing the hydrolysis product with water at room temperature, followed by concentration under reduced pressure.