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    PROCESS FOR PRODUCING ACETIC ANHYDRIDE
    1.
    发明专利
    PROCESS FOR PRODUCING ACETIC ANHYDRIDE 未知

    公开(公告)号：DE3360263D1

    公开(公告)日：1985-07-18

    申请号：DE3360263

    申请日：1983-07-30

    Applicant: HOECHST AG

    Inventor： VOGT WILHELM DR ,  JAGERS ERHARD DR

    IPC: C07C53/12 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/56 ,  C07C67/00

    Abstract: The disclosure relates to a process for making acetic anhydride wherein methyl acetate and/or dimethylether (is) are reacted with carbon monoxide under practically anhydrous conditions at temperatures of 390 DEG to 540 DEG K., under pressures of 1 to 300 bars in the presence of a catalyst system comprised of noble metals belonging to group VIII of the Periodic System of the elements or their compounds, iodine and/or its compounds and a tertiary or quaternary organic nitrogen, phosphorus, arsenic or antimony compound. More particularly, use is made of a catalyst system containing vanadium or niobium or their compounds as additional constituents, the catalyst system being used in combination with reaction gas containing carbon monoxide and 5 to 30 volume % hydrogen.

    PROCESS FOR THE PREPARATION OF ACETIC ANHYDRIDE
    7.
    发明专利
    PROCESS FOR THE PREPARATION OF ACETIC ANHYDRIDE 未知

    公开(公告)号：DE3360893D1

    公开(公告)日：1985-10-31

    申请号：DE3360893

    申请日：1983-08-11

    Applicant: HOECHST AG

    Inventor： VOGT WILHELM DR ,  GLASER HERMANN ,  JAGERS ERHARD DR

    IPC: C07C53/12 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/54 ,  C07C51/56 ,  C07C67/00

    Abstract: The disclosure relates to a process for making acetic anhydride by reacting methyl acetate and/or dimethylether with carbon monoxide, if desired in admixture with up to 20 volume % hydrogen, under practically anhydrous conditions at temperatures of 120 DEG to 270 DEG C., under pressures of 1 to 500 bars in the presence of a catalyst system containing nickel or a nickel compound, an organic iodine or bromine compound as well as a tertiary or quaternary organic phosphorus compound. More particularly, a catalyst system containing a titanium or zirconium compound as an additional constituent is used.

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