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：US09302983B2

公开(公告)日：2016-04-05

申请号：US14546587

申请日：2014-11-18

Applicant: BASF SE

Inventor： Vanessa Simone Lehr ,  Torsten Mattke ,  Carsten Knoesche ,  Heiner Schelling ,  Gerhard Olbert

IPC: C07C263/10 ,  C01B7/04

CPC classification number: C07C263/10 ,  C01B7/04 ,  Y02P20/22 ,  C07C265/00

Abstract: The present invention relates to gas phase phosgenation of amines for preparation of isocyanates. In the present invention, phosgene is prepared by reacting chlorine with an excess of carbon monoxide in a gas phase. The obtained phosgene-containing reaction mixture is divided into two streams by a thermal and/or a membrane separating process. The first stream is a low-carbon monoxide stream of no more than 1% by weight of carbon monoxide, based on a total weight of the first stream. The second stream is a carbon monoxide-rich stream of more than 10% by weight of carbon monoxide, based on a total weight of the second stream. The first stream is used as the phosgene-containing reactant stream in the gas phase phosgenation of amines to prepare isocyanates. The second stream can be recycled into the phosgene synthesis.

公开(公告)号：US10252912B2

公开(公告)日：2019-04-09

申请号：US15557187

申请日：2016-03-10

Applicant: BASF SE

Inventor： Heiner Schelling ,  Torsten Mattke ,  Hans-Juergen Pallasch ,  Kai Thiele

IPC: C01B7/07 ,  C01B32/80 ,  B01D53/00 ,  C07C263/10 ,  C07C263/20 ,  F25J3/00

Abstract: The invention relates to a method of separating a phosgene- and hydrogen chloride-comprising stream (5), wherein said method comprises conveying the hydrogen chloride- and phosgene-comprising stream (5) into a distillation column (1), withdrawing at the bottom of the distillation column (1) a phosgene-comprising stream (7) and withdrawing at the top of the column an essentially hydrogen chloride-comprising stream (9). At least a portion of the stream (9) withdrawn at the top is compressed and at least partially condensed and at least a portion of the liquid and compressed essentially hydrogen chloride-comprising stream is decompressed and recycled into the top of distillation column (1) as reflux.

公开(公告)号：US10544115B2

公开(公告)日：2020-01-28

申请号：US16076600

申请日：2017-02-16

Applicant: BASF SE

Inventor： Dominic Riedel ,  Joaquim Henrique Teles ,  Heiner Schelling ,  Ulrike Wegerle ,  Ulrich Mueller ,  Andrei-Nicolae Parvulescu ,  Jochen Mannweiler ,  Timo Henn ,  Thomas Luederitz ,  Nicolai Tonio Woerz ,  Christian Mueller ,  Markus Weber ,  Daniel Urbanczyk

IPC: C07D301/12 ,  C07D301/36 ,  B01J19/00 ,  B01J29/70 ,  C07D303/04

Abstract: A continuous process for the preparation of propylene oxide, comprising a start-up stage and normal run stage, wherein the normal run stage comprises (i) continuously providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, a formate salt, water and optionally propane, wherein in the liquid feed stream, the molar amount of the formate salt relative to the molar amount of hydrogen peroxide at a given point of time during the normal run stage is aN(Fo/H2O2); (ii) continuously passing the liquid feed stream provided in (i) into an epoxidation zone comprising a catalyst comprising a titanium zeolite having framework type MWW, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propylene oxide, acetonitrile, water, the formate salt, optionally propene, and optionally propane; (iii) continuously removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, acetonitrile, water, at least a portion of the formate salt, optionally propene, and optionally propane; wherein the normal run stage is characterized in an average rate of change of aN(Fo/H2O2) of less than 0 h−1.

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.