公开(公告)号：US20190169149A1

公开(公告)日：2019-06-06

申请号：US16318221

申请日：2017-07-19

Applicant: BASF SE ,  Dow Global Technologies LLC

Inventor： Joaquim Henrique TELES ,  Marvin KRAMP ,  Christian MUELLER ,  Nicolai Tonio WOERZ ,  Bernd METZEN ,  Tobias KELLER ,  Dominic RIEDEL ,  Heiner SCHELLING ,  Markus WEBER ,  Daniel URBANCZYK ,  Andrei-Nicolae PARVULESCU ,  Ulrike WEGERLE ,  Ulrich MUELLER ,  Meinolf WEIDENBACH ,  Werner J. WITZL ,  Karsten LUECKE

IPC: C07D301/32 ,  C07D301/12 ,  B01D3/00 ,  B01D3/40 ,  B01D3/14 ,  B01D5/00

CPC classification number: C07D301/32 ,  B01D1/28 ,  B01D3/00 ,  B01D3/009 ,  B01D3/143 ,  B01D3/40 ,  B01D5/006 ,  B01J29/085 ,  B01J29/7038 ,  B01J29/86 ,  B01J29/89 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0045 ,  B01J2229/186 ,  B01J2229/42 ,  C07D301/12 ,  C07D303/04 ,  Y02P20/127 ,  Y02P20/52

Abstract: The present invention is related to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided in (i) into an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, water, organic solvent, and propene; (iv) separating propene from the effluent stream by distillation, comprising (iv.1) subjecting the effluent stream to distillation conditions in a distillation unit, obtaining a gaseous top stream S0 enriched in propene compared to the effluent stream subjected to distillation conditions, and a liquid bottoms stream S01 enriched in propylene oxide, water and organic solvent compared to the effluent stream subjected to distillation conditions; (iv.2) returning a condensed portion of the stream S0 to an upper part of the distillation unit.