REDUCTION COUPLING OF NITROBENZENE AND REDOX CATALYST

    公开(公告)号:JPH1081658A

    公开(公告)日:1998-03-31

    申请号:JP14768297

    申请日:1997-06-05

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To obtain azo(oxy)benzene useful as an intermediate for chemical industry, etc., in high efficiency by the reduction coupling of nitrobenzene in vapor phase at a high temperature using heterogeneous catalytic action of a specific redox catalyst having reduced or partially reduced form. SOLUTION: Azobenzene and azoxybenzene are produced by the reduction coupling of nitrobenzene in vapor phase at a high temperature using heterogeneous catalytic action of a specific redox catalyst having reduced or partially reduced form. The reducing catalyst contains one or more active metals such as Bi, V, Cr, Mn, Fe, Co, Pb, Mo, Ce, U, Sn, Sb, Cu, La, W, Nb, Pd, Pt, Ni and In. Nitrobenzene is passed on the redox catalyst together with one or more kinds of gaseous reducing agents free from hydrogen for the deoxidization of nitrobenzene. The average oxidized state of the active metal of the redox catalyst is lower than the maximum oxidized state stable under each reaction condition by >=0.5 before introducing nitrobenzene together with the reducing agent.

    8.
    发明专利
    未知

    公开(公告)号:DE19545095A1

    公开(公告)日:1997-06-05

    申请号:DE19545095

    申请日:1995-12-04

    Applicant: BASF AG

    Abstract: The invention relates to a process for the preparation of styrene by dehydrogenating a mixture of ethyl benzol and at least one xylol isomer in the gas phase in the presence of a regeneratable, oxygen-carrying, metallic-oxide catalyst (redox catalyst), with a reducible active ingredient preferably consisting of at least one metallic oxide from the group of oxides of the elements Bi, Ce, Co, Cr, Cu, Fe, In, Mn, Mo, Nb, Ni, Sb, Sn, Pb and V, the xylol being at least partially oxidised.

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