Nippon Petrochemicals Company, Limited

Kojiro Teramoto

Yoshihiko Araki

Hajime Hara

Hideo Horii

Kazuo Miyazaki

Humiaki Oshimi

In a method for purifying a crude epoxidation product of a liquid conjugated diolefin polymer or a vegetable oil which comprises the steps of adding an aqueous washing agent to a crude epoxidation product which is obtained by the reaction of a liquid conjugated diolefin polymer or a vegetable oil with an organic peracid or an epoxidizing agent capable of generating an organic peracid in situ, stirring the mixture, leaving the mixture to stand to induce phase separation and thereafter withdrawing the organic layer, the improvement wherein 50 to 300 parts by weight, per 100 parts by weight of the crude epoxidation product, of a 10-80% by weight aqueous solution of isopropanol is used as the washing agent.

Growing community of inventors

Kamakura, Japan

Kojiro Teramoto