公开(公告)号：US12168642B2

公开(公告)日：2024-12-17

申请号：US17429210

申请日：2020-02-06

Applicant: BASF SE

Inventor： Jun Gao ,  Indre Thiel ,  Christian Schuetz ,  Lukas Metzger ,  Oliver Bey ,  Stefan Blei

IPC: C07C315/00 ,  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.

公开(公告)号：US10975024B2

公开(公告)日：2021-04-13

申请号：US16784287

申请日：2020-02-07

Applicant: BASF SE

Inventor： Indre Thiel ,  Christian Schuetz ,  Stefan Blei ,  Jun Gao ,  Lukas Metzger

IPC: C07C317/14

Abstract: The invention relates to a crystal (C) consisting of at least 95% by weight of 4,4′-dichlorodiphenylsulfoxide, 0 to 2% by weight of impurities and 0 to 3% by weight of an organic solvent (os). Moreover, the present invention relates to a crystal composition (CC) comprising crystals (C) and a process for the production of the crystal composition (CC) and the crystal (C).

公开(公告)号：US10696625B2

公开(公告)日：2020-06-30

申请号：US16314720

申请日：2017-07-06

Applicant: BASF SE

Inventor： Frauke Thrun ,  Joaquim Henrique Teles ,  Jun Gao

IPC: C07C315/02

Abstract: A process for preparing polyaryl ethers in which a polycondensation of the monomer building blocks is carried out using microwave irradiation leads to thermoplastic molding compositions having improved color properties.