公开(公告)号：US20220340519A1

公开(公告)日：2022-10-27

申请号：US17635529

申请日：2020-08-20

Applicant: BASF SE

Inventor： Jessica Nadine HAMANN ,  Oliver BEY ,  Petra DECKERT ,  Andreas MELZER ,  Christian SCHUETZ ,  Stefan BLEI ,  Frauke THRUN

IPC: C07C315/06 ,  C08G75/23

Abstract: The invention relates to a process for purifying 4,4′-dichlorodiphenyl sulfone comprising: (a) providing a suspension comprising particulate 4,4′-dichlorodiphenyl sulfone in carboxylic acid, (b) carrying out a solid-liquid separation of the suspension to obtain residual moisture containing 4,4′-dichlorodiphenyl sulfone and a carboxylic acid comprising filtrate, (c) washing the residual moisture containing 4,4′-dichlorodiphenyl sulfone with an aqueous base and then with water, (d) mixing the aqueous base after being used for washing with a strong acid, or mixing the aqueous base after being used for washing, the carboxylic acid comprising filtrate and a strong acid, (e) carrying out a phase separation in which an aqueous phase and an organic phase comprising the carboxylic acid are obtained.

公开(公告)号：US20220388949A1

公开(公告)日：2022-12-08

申请号：US17775966

申请日：2020-11-13

Applicant: BASF SE

Inventor： Stefan BLEI ,  Friedemann GAITZSCH ,  Christian SCHUETZ ,  Indre THIEL ,  Petra DECKERT ,  Jun GAO ,  Jessica Nadine HAMANN ,  Andreas MELZER

IPC: C07C315/06

Abstract: The invention relates to a process for working up water containing 4,4′-dichlorodiphenyl sulfoxide and/or 4,4′-dichlorodiphenyl sulfone as impurities, comprising: (a) mixing the water containing 4,4′-dichlorodiphenyl sulfoxide and/or 4,4′-dichlorodiphenyl sulfone as impurities with an organic solvent in which 4,4′-dichlorodiphenyl sulfoxide and/or 4,4′-dichlorodiphenyl sulfone have a solubility of at least 0.5 wt % based on the amount of 4,4′-dichlorodiphenyl sulfoxide and/or 4, 4′-dichlorodiphenyl sulfone and organic solvent at 20° C., which forms a two-phase system with water and which can be stripped from water with a stripping gas and subsequently separating the obtained mixture into an aqueous phase and an organic phase, and (b) stripping the organic solvent from the aqueous phase with a stripping gas.

公开(公告)号：US20160168082A1

公开(公告)日：2016-06-16

申请号：US14941167

申请日：2015-11-13

Applicant: BASF SE

Inventor： Tim Jungkamp ,  Robert BAUMANN ,  Michael BARTSCH ,  Gerd HADERLEIN ,  Hermann LUYKEN ,  Jens SCHEIDEL ,  Tobias AECHTNER ,  Peter PFAB ,  Petra DECKERT ,  Wolfgang SIEGEL ,  Peter BASSLER

IPC: C07C253/30

CPC classification number: C07C253/30 ,  C07C253/10 ,  Y02P20/582 ,  C07C255/07

Abstract: A process is described for preparing 3-pentenenitrile, characterized by the following process steps: (a) isomerizing a reactant stream which comprises 2-methyl-3-butenenitrile over at least one dissolved or dispersed isomerization catalyst to give a stream 1 which comprises the at least one isomerization catalyst, 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, (b) distilling stream 1 to obtain a stream 2 as the top product which comprises 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, and a stream 3 as the bottom product which comprises the at least one isomerization catalyst, (c) distilling stream 2 to obtain a stream 4 as the top product which, compared to stream 2, is enriched in (Z)-2-methyl-2-butenenitrile, based on the sum of all pentenenitriles in stream 2, and a stream 5 as the bottom product which, compared to stream 2, is enriched in 3-pentenenitrile and 2-methyl-3-butenenitrile, based on the sum of all pentenenitriles in stream 2, (d) distilling stream 5 to obtain a stream 6 as the bottom product which comprises 3-pentenenitrile and a stream 7 as the top product which comprises 2-methyl-3-butenenitrile.

Abstract translation: 描述了制备3-戊烯腈的方法，其特征在于以下方法步骤：（a）在至少一种溶解或分散的异构化催化剂上异构化包含2-甲基-3-丁烯腈的反应物流，得到流1，其包含 至少一种异构化催化剂，2-甲基-3-丁烯腈，3-戊烯腈和（Z）-2-甲基-2-丁烯腈，（b）蒸馏物流1，得到作为顶部产物的物流2，其包含2-甲基 -3-丁烯腈，3-戊烯腈和（Z）-2-甲基-2-丁烯腈，以及作为底部产物的料流3，其包含至少一种异构化催化剂，（c）蒸馏物流2以获得物流4， 与流2相比，基于流2中的所有五烯丙烯的总和和作为底部产物的流5，与流2相比富含（Z）-2-甲基-2-丁烯腈的顶部产物与流2相比较 ，富含3-戊烯腈和2-甲基-3-丁烯腈，基于所有戊烯腈的总和 （d）蒸馏流5以获得作为底部产物的流6，其包含3-戊烯腈和作为顶部产物的料流7，其包含2-甲基-3-丁烯腈。