公开(公告)号：DE3926290A1

公开(公告)日：1991-02-14

申请号：DE3926290

申请日：1989-08-09

Applicant: BASF AG

Inventor： STECK WERNER DR ,  LERMER HELMUT DR ,  SCHWARZMANN MATTHIAS DR ,  DOCKNER TONI DR

IPC: C07C37/00

Abstract: A process for the preparation of mixtures of isomeric cresols with a molar ratio of para- to meta-cresol of from 0.6:1 to 10:1 by isomerization of cresol mixtures or ortho- and/or metal-cresol on zeolite catalysts of the pentasil type in the gas phase at from 300 DEG to 600 DEG C. under from 0.01 to 50 bar entails the mean particle size of the zeolite catalyst being at leat 3 mu m, and the selectivity in the established test for the disproportionation of ethylbenzene to diethylbenzene isomers being at least 60% for para-diethylbenzene.

公开(公告)号：DE3913163A1

公开(公告)日：1990-10-25

申请号：DE3913163

申请日：1989-04-21

Applicant: BASF AG

Inventor： STECK WERNER DR ,  LERMER HELMUT DR ,  HERMELING DIETER DR ,  GROSSE BRINKHAUS KARL-HEINZ DR

IPC: C07C41/28 ,  C07C43/164 ,  C07C43/168 ,  C07C43/205

公开(公告)号：DE3724035A1

公开(公告)日：1989-02-02

申请号：DE3724035

申请日：1987-07-21

Applicant: BASF AG

Inventor： LERMER HELMUT DR ,  HOELDERICH WOLFGANG DR ,  DOCKNER TONI DR ,  KOEHLER HERMANN DR

IPC: B01J29/08 ,  B01J29/40 ,  B01J29/80 ,  B01J29/86 ,  B01J29/88 ,  C07B61/00 ,  C07D231/12 ,  C07D231/18 ,  C07D231/20 ,  C07D231/22 ,  C07D233/22 ,  C07D233/54 ,  C07D233/64 ,  C07D233/70