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    PROCESS FOR PRODUCING 4,4`-DICHLORODIPHENYL SULFOXIDE
    3.
    发明申请
    PROCESS FOR PRODUCING 4,4`-DICHLORODIPHENYL SULFOXIDE 有权

    公开(公告)号：US20220098147A1

    公开(公告)日：2022-03-31

    申请号：US17429210

    申请日：2020-02-06

    Applicant: BASF SE

    Inventor： Jun GAO ,  Indre THIEL ,  Christian SCHUETZ ,  Lukas METZGEN ,  Oliver BEY ,  Stefan BLEI

    IPC: C07C315/02 ,  C07C315/06

    Abstract: The invention relates to a process for producing 4,4′-dichlorodiphenyl sulfoxide comprising: (I) 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; (II) mixing aqueous hydrochloric acid and the intermediate reaction product at a temperature in the range from 70 to 110° C. to obtain an organic phase comprising 4,4′-dichlorodiphenyl sulfoxide and an aqueous phase; (III) cooling the organic phase comprising the 4,4′-dichlorodiphenyl sulfoxide to a temperature below the saturation point of 4,4′-dichlorodiphenyl sulfoxide to obtain a suspension comprising crystallized 4,4′-dichlorodiphenyl sulfoxide; (IV) solid-liquid-separation of the suspension to obtain a residual moisture containing solid 4,4′-dichlorodiphenyl sulfoxide comprising crystallized 4,4′-dichlorodiphenyl sulfoxide and mother liquor.

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

    公开(公告)号：US20220356152A1

    公开(公告)日：2022-11-10

    申请号：US17636932

    申请日：2020-08-20

    Applicant: BASF SE

    Inventor： Stefan BLEI ,  Jessica Nadine HAMANN ,  Lukas Karl METZGER ,  Christian SCHUETZ ,  Jun GAO ,  Frauke THRUN ,  Andreas MELZER ,  Michael Klemens MUELLER

    IPC: C07C315/06

    Abstract: The invention relates to a process for purifying crude 4,4′-dichlorodiphenyl sulfone comprising: (a) dissolving the crude 4,4′-dichlorodiphenyl sulfone which may contain water in an organic solvent in which 4,4′-dichlorodiphenyl sulfone has a solubility of 0.5 to 20% at 20° C. and optionally adding water to obtain a solution which comprises 4,4′-dichlorodiphenyl sulfone, the organic solvent and 1 to 30 wt % water based on the amount of 4,4′-dichlorodiphenyl sulfone and water; (b) cooling the solution to a temperature below the saturation point of 4,4′-dichlorodiphenyl sulfone to obtain a suspension comprising crystallized 4,4′-dichlorodiphenyl sulfone; (c) carrying out a solid-liquid separation to obtain residual moisture containing 4,4′-dichlorodiphenyl sulfone and a mother liquor; (d) washing the residual moisture containing 4,4′-dichlorodiphenyl sulfone with an organic solvent in which 4,4′-dichlorodiphenyl sulfone has a solubility of 0.5 to 20% at 20° C.; (e) optionally repeating steps (b) to (d); (f) drying the 4,4′-dichlorodiphenyl sulfone.

    PROCESS FOR THE OXIDATION OF SULFOXIDES
    5.
    发明申请
    PROCESS FOR THE OXIDATION OF SULFOXIDES 审中-公开
    硫氧化物氧化过程

    公开(公告)号：US20160122296A1

    公开(公告)日：2016-05-05

    申请号：US14894432

    申请日：2014-05-28

    Applicant: BASF SE

    Inventor： Andrei-Nicolae PARVULESCU ,  Ulrich MUELLER ,  Jan SPIELMANN ,  Wilfried VOGEL ,  Jun GAO

    IPC: C07C315/02 ,  B01J29/89 ,  C07C315/06

    CPC classification number: C07C315/02 ,  B01J29/89 ,  C07C315/06 ,  C07C317/14

    Abstract: The present invention relates to a process for oxidizing a sulfoxide to the respective sulfone, said process comprising reacting the sulfoxide with hydrogen peroxide in the presence of a catalyst, obtaining a mixture (M) comprising the sulfone and the catalyst, wherein the catalyst comprises a porous titanium-containing silicate as a catalytically active material.

    Abstract translation: 本发明涉及将亚砜氧化成各种砜的方法，所述方法包括在催化剂存在下使亚砜与过氧化氢反应，得到包含砜和催化剂的混合物（M），其中催化剂包含 多孔含钛硅酸盐作为催化活性材料。

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

    公开(公告)号：US20220267261A1

    公开(公告)日：2022-08-25

    申请号：US17635580

    申请日：2020-08-20

    Applicant: BASF SE

    Inventor： Jun GAO ,  Frauke THRUN ,  Indre THIEL ,  Jessica Nadine HAMANN ,  Christian SCHUETZ ,  Stefan BLEI

    IPC: C07C315/02 ,  C07C315/06

    Abstract: The invention relates to a process for producing 4,4′-dichlorodiphenyl sulfone, comprising: (I) reacting thionyl chloride, chlorobenzene and aluminum chloride forming an intermediate reaction product and hydrogen chloride; (II) mixing aqueous hydrochloric acid and the intermediate reaction product to obtain an organic phase comprising 4,4′-dichlorodiphenyl sulfoxide and an aqueous phase; (III) cooling the organic phase to a temperature below the saturation point of 4,4′-dichlorodiphenyl sulfoxide to obtain a suspension; (IV) solid-liquid-separation of the suspension to obtain crystallized 4,4′-dichlorodiphenyl sulfoxide, and mother liquor; (V) washing the crystallized 4,4′-dichlorodiphenyl sulfoxide with a carboxylic acid to obtain carboxylic acid-wet 4,4′-dichlorodiphenyl sulfoxide; (VI) reacting the washed 4,4′-dichlorodiphenyl sulfoxide and an oxidizing agent in a carboxylic acid as solvent to obtain a reaction mixture comprising 4,4′-dichlorodiphenyl sulfone and carboxylic acid; (VII) separating the reaction mixture comprising 4,4′-dichlorodiphenyl sulfone and carboxylic acid into a residual moisture comprising 4,4′-dichlorodiphenyl sulfone as crude product and a liquid phase comprising carboxylic acid.

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