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    PROCESS FOR PRODUCING 4,4'-DICHLORODIPHENYL SULFONE
    1.
    发明申请
    PROCESS FOR PRODUCING 4,4'-DICHLORODIPHENYL SULFONE 有权

    公开(公告)号：US20220324795A1

    公开(公告)日：2022-10-13

    申请号：US17635142

    申请日：2020-08-20

    Applicant: BASF SE

    Inventor： Jessica Nadine HAMANN ,  Stefan BLEI ,  Oliver BEY

    IPC: C07C315/02 ,  C07C317/14

    Abstract: The invention relates to a process for producing 4,4′-dichlorodiphenyl sulfone comprising reacting a solution comprising 4,4′-dichlorodiphenyl sulfoxide and at least one linear C6-C10 carboxylic acid as solvent with an oxidizing agent to obtain a crude reaction product comprising 4,4′-dichlorodiphenyl sulfone, wherein the concentration of water in the reaction mixture is kept below 5 wt %, the process comprising: (a) adding 0.9 to 1.05 mol oxidizing agent per mol 4,4′-dichlorodiphenyl sulfoxide uniformly distributed to the solution at a temperature in the range from 80 to 105° C. over a period from 1.5 to 5 h in a first step to obtain the reaction mixture; (b) agitating the reaction mixture after completion of the first step at the temperature of the first step for 5 to 30 min without adding oxidizing agent; (c) adding 0.05 to 0.2 mol oxidizing agent per mol 4,4′-dichlorodiphenyl sulfoxide to the reaction mixture at a temperature in the range from 80 to 105° C. over a period of less than 40 min in a second step; (d) agitating the reaction mixture after completion of the second step at the temperature of the second step for 10 to 30 min without adding oxidizing agent, (e) heating the reaction mixture to a temperature in the range from 95 to 110° C. and hold this temperature for 10 to 90 min to obtain a crude reaction product comprising 4,4′-dichlorodiphenyl sulfone.

    PROCESS FOR PRODUCING 4,4'-DICHLORODIPHENYL SULFOXIDE
    2.
    发明申请
    PROCESS FOR PRODUCING 4,4'-DICHLORODIPHENYL SULFOXIDE 有权

    公开(公告)号：US20220135521A1

    公开(公告)日：2022-05-05

    申请号：US17429035

    申请日：2020-02-06

    Applicant: BASF SE

    Inventor： Indre THIEL ,  Oliver BEY ,  Christian SCHUETZ ,  Stefan BLEI

    IPC: C07C315/02 ,  C07C315/06

    Abstract: The invention relates to a process for producing 4,4′-dichlorodiphenyl sulfoxide comprising: (a) reacting thionyl chloride, chlorobenzene and aluminum chloride in a molar ratio of thionyl chloride:chlorobenzene:aluminum chloride of 1:(6 to 9):(1 to 1.5) at a temperature in the range from 0 to below 20° C., forming an intermediate reaction product and hydrogen chloride, (b) mixing aqueous hydrochloric acid and the intermediate reaction product at a temperature in the range from 70 to 110° C. to obtain a crude reaction product comprising 4,4′-dichlorodiphenyl sulfoxide, (c) separating the crude reaction product into an organic phase comprising the 4,4′-dichlorodiphenyl sulfoxide and an aqueous phase, (d) washing the organic phase with an extraction liquid.

    APPARATUS AND PROCESS FOR THE CONTINUOUS REACTION OF LIQUIDS WITH GASES
    5.
    发明申请
    APPARATUS AND PROCESS FOR THE CONTINUOUS REACTION OF LIQUIDS WITH GASES 有权
    液体与气体的连续反应的装置和方法

    公开(公告)号：US20140200369A1

    公开(公告)日：2014-07-17

    申请号：US14147823

    申请日：2014-01-06

    Applicant: BASF SE

    Inventor： Oliver BEY ,  Christian KUNKELMANN ,  Roland BAUER ,  Andreas RAICHLE ,  Hartmut RIECHERS ,  Peter ZEHNER

    IPC: B01J19/26

    CPC classification number: B01J4/002 ,  B01J8/006 ,  B01J8/226 ,  B01J8/228 ,  B01J10/00 ,  B01J19/246 ,  B01J19/2465 ,  B01J2208/00132 ,  B01J2208/00902 ,  B01J2219/00081

    Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. In the apparatus of the invention, the diversion of an internal circulatory flow in the reactor is effected by means of a diversion pan which is arranged underneath a heat exchanger.

    Abstract translation: 本发明涉及一种用于液体与气体的连续反应的文丘里反应器类型的装置，特别是用于氢化，氧化或乙酰化的反应。 用于通过二硝基甲苯的氢化制备甲苯二胺，以及在装置中液体反应物与气态反应物的连续反应的方法。 在本发明的装置中，内部循环流在反应器中的分流通过设置在热交换器下方的转向盘进行。

    A PROCESS FOR PRODUCING 4,4'-DICHLORODIPHENYL SULFONE
    7.
    发明申请
    A PROCESS FOR PRODUCING 4,4'-DICHLORODIPHENYL SULFONE 有权

    公开(公告)号：US20220289674A1

    公开(公告)日：2022-09-15

    申请号：US17635033

    申请日：2020-08-20

    Applicant: BASF SE

    Inventor： Frauke THRUN ,  Jessica Nadine HAMANN ,  Christian SCHUETZ ,  Oliver BEY ,  Stefan BLEI

    IPC: C07C315/02 ,  C07C315/06

    Abstract: The invention relates to a process for producing 4,4′-dichlorodiphenyl sulfone, comprising: (a) reacting 4,4′-dichlorodiphenyl sulfoxide and an oxidizing agent in at least one carboxylic acid as solvent to obtain a reaction mixture comprising 4,4′-dichlorodiphenyl sulfone and carboxylic acid; (b) separating the reaction mixture into a first stream comprising 4,4′-dichlorodiphenyl sulfone and a second stream comprising carboxylic acid; (c) purifying the second stream comprising carboxylic acid by distilling a part of the second stream comprising carboxylic acid stripping low boilers from at least a part of the second stream comprising carboxylic acid (d) recycling the purified carboxylic acid into the reaction (a).

    CONTINUOUS PREPARATION OF AN OPTICALLY ACTIVE CARBONYL COMPOUND BY ASYMMETRIC HYDROGENATION
    8.
    发明申请
    CONTINUOUS PREPARATION OF AN OPTICALLY ACTIVE CARBONYL COMPOUND BY ASYMMETRIC HYDROGENATION 有权

    公开(公告)号：US20210214296A1

    公开(公告)日：2021-07-15

    申请号：US17274142

    申请日：2019-09-03

    Applicant: BASF SE

    Inventor： Peter ZEHNER ,  Oliver BEY

    IPC: C07C45/62 ,  B01J19/00 ,  B01J19/18 ,  C07C31/04 ,  B01J31/24 ,  C07C29/17 ,  C07C33/14 ,  C07C47/21

    Abstract: Process for the continuous production of an optically active carbonyl compound by asymmetric hydrogenation of a prochiral α,β-unsaturated carbonyl compound with hydrogen in the presence of a homogeneous rhodium catalyst that has at least one chiral ligand, wherein a liquid reaction mixture comprising the prochiral α,β-unsaturated carbonyl compound is subjected in a first, backmixed reactor to a gas/liquid two-phase hydrogenation, and the liquid reaction mixture is then further hydrogenated in a second reactor, wherein the prochiral α,β-unsaturated carbonyl compound is employed in the first reactor in a concentration from 3% to 20% by weight. The process allows a high total conversion to the prochiral α,β-unsaturated carbonyl compound.

    A PROCESS FOR PURIFYING 4,4'-DICHLORODIPHENYL SULFONE
    10.
    发明申请
    A PROCESS FOR PURIFYING 4,4'-DICHLORODIPHENYL SULFONE 有权

    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.

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