PROCESS FOR THE PURIFICATION OF CRUDE PROPENE OXIDE
摘要
The present invention relates to a process for the purification of a crude propene oxide containing methanol and acetaldehyde by a continuously operated extractive distillation using an extraction solvent lowering the volatility of methanol and feeding a compound containing an unsubstituted NH2 group capable of reacting with acetaldehyde to a distillation column at a point above the feeding point of the crude propene oxide to give a purified propene oxide containing less than 100 ppm methanol and less than 100 ppm acetaldehyde. The invention also relates to a process for the catalytic epoxidation of propene that includes this purification stage.
申请公布号
EP1567512(B1)
申请公布日期
2013.06.12
申请号
EP20030785659
申请日期
2003.11.25
申请人
EVONIK DEGUSSA GMBH;THYSSENKRUPP UHDE GMBH
发明人
HOFEN, WILLI;HAAS, THOMAS;WOELL, WOLFGANG;THIELE, GEORG