公开(公告)号：US20240300817A1

公开(公告)日：2024-09-12

申请号：US18277415

申请日：2022-02-10

Applicant: BASF SE

Inventor： Torsten MATTKE ,  Kai THIELE ,  Jens FERBITZ ,  Peter VAN DEN ABEEL ,  Hans-Juergen PALLASCH

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

CPC classification number: C01B7/0712 ,  B01D53/002 ,  C01B7/0731 ,  C01B32/80 ,  C07C263/20 ,  B01D2256/26 ,  B01D2257/2064

Abstract: A process of separating phosgene and hydrogen chloride, comprises: conveying a mixed stream containing hydrogen chloride and phosgene into a distillation column; withdrawing from the distillation column a bottom stream containing phosgene; withdrawing a top stream containing hydrogen chloride; compressing at least a portion of the top stream and at least partially condensing the compressed top stream to form a liquid stream, decompressing at least a portion of the liquid stream to form a cooled liquid stream and a cooled gas stream; and recycling the cooled liquid stream to the top of the distillation column as a reflux; the process additionally comprising temporarily introducing an absorbing solvent into the distillation column, in particular during starting-up and/or shutting-down of the process. The process allows for safe operation even when hydrogen chloride production only gradually begins or decreases, without the necessity of storing hydrogen chloride.

公开(公告)号：US20220332587A1

公开(公告)日：2022-10-20

申请号：US17612237

申请日：2020-04-20

Applicant: BASF SE

Inventor： Gerhard OLBERT ,  Jens FERBITZ ,  Kai THIELE ,  Peter VAN DEN ABEEL ,  Koenraad VANDEWALLE ,  Jim BRANDTS ,  Torsten MATTKE

IPC: C01B32/80 ,  B01J8/06

Abstract: The invention relates to a process for producing phosgene by gas-phase reaction of carbon monoxide and chlorine in the presence of a catalyst in a reactor which comprises a plurality of parallel catalyst tubes which are filled with the catalyst and around which at least one fluid heat transfer medium flows, where a feed stream of a mixture of a chlorine input stream and a carbon monoxide input stream is fed into the catalyst tubes and is allowed to react to give a phosgene-comprising product gas mixture, wherein the reaction is carried out at an area load of more than 2.75 kg of phosgene/m2s. The invention also provides a reactor for carrying out the process.

公开(公告)号：US20220212936A1

公开(公告)日：2022-07-07

申请号：US17605737

申请日：2020-04-14

Applicant: BASF SE

Inventor： Torsten MATTKE ,  Gerhard OLBERT ,  Jochen GAUER ,  Kai THIELE ,  Koenraad VANDEWALLE ,  Jens FERBITZ ,  Peter VAN DEN ABEEL

IPC: C01B32/80 ,  C25B1/34 ,  C25B15/08

Abstract: The present invention relates to a process for preparing phosgene by reacting chlorine with carbon monoxide over an activated carbon catalyst, wherein the content of chlorine oxides in the chlorine feed stream is low, to an apparatus for preparation of phosgene and to the use of the phosgene prepared by the process of the invention.

公开(公告)号：US20180044179A1

公开(公告)日：2018-02-15

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 ,  C07C263/10 ,  B01D53/00

CPC classification number: C01B7/0731 ,  B01D53/002 ,  B01D2257/2045 ,  C01B7/0712 ,  C01B32/80 ,  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.