公开(公告)号：DE3135618A1

公开(公告)日：1983-03-17

申请号：DE3135618

申请日：1981-09-09

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG DIPL CHEM ,  MROSS WOLF-DIETER DIPL CHEM DR ,  SCHWARZMANN MATTHIAS DIPL CHEM

IPC: B01J29/04 ,  C07C1/20 ,  C07C11/02 ,  C07C15/02

Abstract: A process for the preparation of lower olefins from methanol or dimethyl ether by catalytic conversion at from 300 DEG to 550 DEG C. in two stages over borosilicate zeolites, wherein C2-C4-olefins and C1-C4-paraffins are removed after the first reaction stage, the C5+ hydrocarbons are passed to the second reaction stage, the aromatics are removed from the reaction product of the second stage and the remaining reaction products are recycled. The advantage of this process is an improvement in the yield of olefins.