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    MULTICOMPONENT METALLIC CATALYST AND PRODUCTION OF SUBSTITUTED AROMATIC AMINE
    1.
    发明专利
    MULTICOMPONENT METALLIC CATALYST AND PRODUCTION OF SUBSTITUTED AROMATIC AMINE 失效

    公开(公告)号：JPH1076161A

    公开(公告)日：1998-03-24

    申请号：JP19538897

    申请日：1997-07-22

    Applicant: DEGUSSA

    Inventor： AUER EMMANUEL DR ,  FREUND ANDREAS DR ,  GROS MICHAEL ,  HARTUNG ROLF

    IPC: B01J23/46 ,  B01J23/656 ,  B01J23/889 ,  B01J23/89 ,  C07B61/00 ,  C07C209/36 ,  C07C211/45 ,  C07C211/46

    Abstract: PROBLEM TO BE SOLVED: To ensure high selectively by doping iridium with at least one kind of element selected from among Mn, Co, Fe, Ni, Cu and Ru. SOLUTION: This catalyst contains iridium by 0.3-12wt.%, especially O. 5-7wt.% of the amt. of the carrier material and at least one kind of metal selected from among Mn, Fe, Co, Ni, Cu and Ru by 1-100wt.%, especially 5-50wt.% of the amt. of the iridium. It is produced by suspending a carrier in water, adding a soln. of salts of the required metals and reducing the salts with a water-soluble reducing agent at 0-100 deg.C. When this catalyst is used, a substd. arom. nitro compd. can be converted into the corresponding arom. amine by hydrogenation with high selectivity without producing a dehalogenated product and other undesirable by-product.

    METHOD FOR CATALYTIC HYDROGENATION OF DINITROTOLUENE, AND CATALYST
    2.
    发明专利
    METHOD FOR CATALYTIC HYDROGENATION OF DINITROTOLUENE, AND CATALYST 失效

    公开(公告)号：JP2000281631A

    公开(公告)日：2000-10-10

    申请号：JP2000070399

    申请日：2000-03-14

    Applicant: DEGUSSA

    Inventor： EMANUEL AUER ,  GROS MICHAEL ,  PACKRUHN UWE

    IPC: B01J23/46 ,  B01J23/64 ,  B01J23/648 ,  B01J23/656 ,  B01J23/89 ,  C07B61/00 ,  C07C209/36 ,  C07C211/50 ,  C07C211/51

    Abstract: PROBLEM TO BE SOLVED: To improve the selectivity of diaminotoluene in the catalytic hydrogenation of dinitrotoluene, suppress the formation of by-products and improve the yield of toluenediamine by the selection and synthesis of a specific hydrogenation catalyst. SOLUTION: The catalytic hydrogenation of dinitrotoluene to toluenediamine is carried out by using a catalyst consisting of a composite metal catalyst containing iridium and at least one kind of metal selected from vanadium, nickel, manganese, iron, cobalt, copper and platinum supported by a carrier. The carrier is preferably activated carbon, aluminum oxide, silicon dioxide or their mixed oxide. The catalyst is preferably produced e.g. by suspending the carrier in water, adding a solution of corresponding salt to effect the impregnation of the salt into the carrier and adding proper base consisting of the hydroxide of the metal to deposit the metal on the carrier.

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