公开(公告)号：US10676451B2

公开(公告)日：2020-06-09

申请号：US16315345

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

IPC: C07D301/32 ,  B01D3/14 ,  C07D303/04

Abstract: Disclosed is a process for purifying propylene oxide. A stream S0 containing propylene oxide, acetonitrile, water, and an organic compound containing one or more of acetone and propionaldehyde is provided. Propylene oxide is separated from S0 by subjecting S0 to distillation in a first distillation unit, obtaining a gaseous top stream S1c enriched in propylene oxide, a liquid bottom stream S1a enriched in acetonitrile and water, and a side stream S1b containing propylene oxide and enriched in the carbonyl compound; reacting the carbonyl compound in S1b with an organic compound containing an amino group to obtain a reaction product; separating propylene oxide from the reaction product in a second distillation unit, obtaining a gaseous top stream S3a enriched in propylene oxide and a liquid bottoms stream S3b enriched in the reaction product; and introducing stream S3a into the first distillation unit.

公开(公告)号：US10544116B2

公开(公告)日：2020-01-28

申请号：US16315680

申请日：2017-07-19

Applicant: BASF SE

Inventor： Joaquim Henrique Teles ,  Marvin Kramp ,  Christian Mueller ,  Nicolai Tonio Woerz ,  Bernd Metzen ,  Tobias Keller ,  Dominic Riedel ,  Markus Weber ,  Daniel Urbanczyk ,  Andrei-Nicolae Parvulescu ,  Ulrike Wegerle ,  Ulrich Mueller

IPC: C07D301/12 ,  C07D301/32 ,  C07D303/04

Abstract: Disclosed herein is a process for purifying propylene oxide, including the steps of: (i) providing a stream S0 containing propylene oxide, acetonitrile, water, and an organic compound containing a carbonyl group —C(═O)—; and (ii) separating propylene oxide from the stream S0 by subjecting the stream S0 to distillation conditions in a distillation column to obtain a gaseous top stream S1c which is enriched in propylene oxide compared to the stream S0, a liquid bottoms stream S1a which is enriched in acetonitrile and water compared to the stream S0, and a side stream S1b containing propylene oxide which is enriched in the carbonyl compound compared to the stream S0.

公开(公告)号：US10435381B2

公开(公告)日：2019-10-08

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 ,  C07D303/04 ,  B01D3/00 ,  B01D3/14 ,  B01D5/00 ,  B01D3/40 ,  B01J29/08

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.

公开(公告)号：US11034631B2

公开(公告)日：2021-06-15

申请号：US16475566

申请日：2018-01-24

Applicant: BASF SE

Inventor： Bernd Heida ,  Tobias Keller ,  Jan-Oliver Weidert

IPC: C07C7/08 ,  B01D3/14 ,  B01D3/34 ,  B01D11/04 ,  B01D11/00

Abstract: Process for isolating pure 1,3-butadiene from a crude C4 fraction by extractive distillation using a selective solvent, wherein (a) the crude C4 fraction is introduced into a predistillation column, a first low boiler fraction comprising C3-hydrocarbons is taken off as overhead stream, a gaseous C4 fraction is taken off as side stream and a first high boiler fraction is taken off as bottom stream, (b) the gaseous C4 fraction is brought into contact with a selective solvent in at least one extraction column, giving an overhead fraction comprising butanes and butenes and a bottom fraction comprising 1,3-butadiene and selective solvent, (c) crude 1,3-butadiene is desorbed from the bottom fraction in at least one stripping column, with a stripped selective solvent being obtained and the stripped selective solvent being recirculated to the extraction column, and (d) at least part of the crude 1-3-butadiene is fed to a pure distillation column and a second high boiler fraction is separated off and a gaseous purge stream is taken off. Gaseous purge streams from the columns which are necessary in order to keep the concentration of molecular oxygen below a predetermined concentration limit are consolidated with output streams which are in any case provided for discharging other components in the process. The recirculation of the second high boiler fraction to a lower section of the predistillation column creates a further degree of freedom in operation of the pure distillation column.

公开(公告)号：US10968152B2

公开(公告)日：2021-04-06

申请号：US16493185

申请日：2018-03-12

Applicant: BASF SE

Inventor： Bernd Heida ,  Tobias Keller

IPC: C07C11/167 ,  B01D3/14 ,  B01D3/40 ,  C07C7/08

Abstract: A process for isolating pure 1,3-butadiene from a crude C4 fraction, which produces pure 1,3-butadiene having a prescribed maximum content of at least one low boiler and a prescribed maximum content of 1,2-butadiene, in each case based on 1,3-butadiene, wherein (a) a low boiler fraction and a high boiler fraction are separated off by distillation from the crude C4 fraction, giving a purified C4 fraction whose content of the at least one low boiler, based on 1,3-butadiene, is equal to or lower than the prescribed maximum content of the at least one low boiler and whose content of 1,2-butadiene, based on 1,3-butadiene, is equal to or lower than the prescribed maximum content of 1,2-butadiene; (b) the purified C4 fraction is subjected to at least one extractive distillation using a selective solvent, giving at least a fraction comprising butanes and butenes and a pure 1,3-butadiene fraction, is described. The process makes a pure distillation column dispensable.