Process for preparing n n'-diarylthioureas
    8.
    发明授权
    Process for preparing n n'-diarylthioureas 失效
    制备N二恶英菌的方法

    公开(公告)号:US3636104A

    公开(公告)日:1972-01-18

    申请号:US3636104D

    申请日:1968-10-29

    申请人: OLIN MATHIESON

    IPC分类号: C07C335/16 C07C157/00

    CPC分类号: C07C335/16

    摘要: THE PROCESS FOR PREPARING N,N''-DIARYLTHIOUREAS BY REACTING: (A) CARBON DISULFIDE AND/OR CARBONYL SULFIDE, (B) WATER, (C) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) AN AROMATIC NITRO COMPOUND, (2) AN AROMATIC NITROSO COMPOUND, (3) AND MIXTURES OF (1) AND (2), (D) AND A BASE, AND RECOVERING THE N,N''-DIARYLTHIOUREAS PRODUCED THEREBY.

    Preparation of aromatic isocyanates

    公开(公告)号:US3632827A

    公开(公告)日:1972-01-04

    申请号:US3632827D

    申请日:1968-11-21

    申请人: OLIN MATHIESON

    发明人: SMITH ERIC

    摘要: THE PROCESS FOR PREPARING AN ORGANIC ISOCYANATE BY REACTING AN ORGANIC NITRO COMPOUND WITH CARBON MONOXIDE IN THE PRESENCE OF A CATALYST SYSTEM COMPRISED OF (1) A NITROGEN-CONTAINING HETEROAROMATIC COMPOUND AND (2) A HALIDE OF A NOBLE METAL, AND (3) A HALIDE OF A NON-NOBLE METAL SELECTED FROM THE GROUP CONSISTING OF IRON AND THE METALS OF GROUPS IVA, VA, VIA, VIIA, IIB, IVB, AND VB OF THE PERIODIC TABLE. THE HETEROAROMATIC NITROGEN-CONTAINING COMPOUND IS ONE CONTAINING BETWEEN FIVE AND SIX MEMBERS IN THE RING, CONTAINING NO ELEMENT OTHER THAN NITROGEN AND CARBON IN THE RING, AND HAVING AT LEAST TWO DOUBLE BONDS IN THE RING. PYRIDINE AND ISOQUINOLINE ARE THE PREFERRED HETEROAROMATIC COMPOUNDS. THE NOBLE METAL HALIDE IS PREFERABLY A HALIDE OF PALLADIUM, RHODIUM, IRIDIUM, RHENIUM, PLATINUM OR MIXTURES THEREOF. THE PREFERRED NON-NOBLE METAL HALIDES ARE HALIDES OF TITANIUM, ZIRCONIUM, VANADIUM, TANTALUM, CHROMIUM, MANGANESE, IRON, ZINC, MERCURY, GERMANIUM, TIN, LEAD, ARSENIC, ANTIMONY AND BISMUTH. A FOURTH COMPONENT, SUCH AS MOLYBDENUM TRIOXIDE OR ANOTHER METAL OXIDE, MAY ALSO BE INCLUDED IN THE CATALYST SYSTEM.