公开(公告)号：US20200255374A1

公开(公告)日：2020-08-13

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：US20220135522A1

公开(公告)日：2022-05-05

申请号：US17429028

申请日：2020-02-06

Applicant: BASF SE

Inventor： Lukas METZGER ,  Christian SCHUETZ ,  Indre THIEL ,  Stefan BLEI

IPC: C07C315/06

Abstract: The invention relates to a process for obtaining 4,4′-dichlorodiphenyl sulfoxide from a liquid mixture comprising dichlorodiphenyl sulfoxide and a solvent, comprising: (a) cooling the liquid mixture to a temperature below the saturation point of 4,4′-dichlorodiphenyl sulfoxide in the solvent to obtain a suspension comprising crystallized 4,4′-dichlorodiphenyl sulfoxide, (b) solid-liquid-separation of the suspension to obtain a residual moisture containing solid 4,4′-dichlorodiphenyl sulfoxide as a product and mother liquor, (c) concentrating the mother liquor, (d) recycling at least a part of the concentrated mother liquor into the cooling step (a).

公开(公告)号：US20220127221A1

公开(公告)日：2022-04-28

申请号：US17429043

申请日：2020-02-04

Applicant: BASF SE

Inventor： Indre THIEL ,  Christian SCHUETZ ,  Stefan BLEI ,  Jun GAO ,  Lukas METZGER

IPC: C07C315/06

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).