中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

183 records (took 0.027 seconds)

    52.
    发明专利
    未知

    公开(公告)号：DE69109746T2

    公开(公告)日：1995-10-26

    申请号：DE69109746

    申请日：1991-06-05

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HONDA TADATOSHI ,  HORIUCHI NOBUHIKO ,  MURAKAMI MASAMI ,  NAGAYAMA TOKIO ,  KITAGAWA JUN ,  KAWAHARA KAZUNORI

    IPC: B01J23/88 ,  C07C45/35 ,  C07C45/37 ,  C07C45/39 ,  C07C47/22

    Abstract: A method for preparing acrolein or methacrolein comprises subjecting propylene, secondary propanol, isobutylene or tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst represented by the following general formula (I): wherein X represents at least one element selected from the group consisting of Ni and Co; Y represents at least one element selected from the group consisting of K, Rb, Cs and Tl; and Z represents at least one element selected from the group consisting of Be, Mg, Ca, Sr, Ba, Ce, Ti, Zr, Nb, Cr, W, Mn, Cu, Ag, Zn, Cd, B, Al, Si, Ge, Sn, Pb, P, As, Sb, S, Se and Te; a, b, c, d, e, f and g each represents an atomic ratio of the corresponding element and when a is assumed to be 12, b = 0.1 SIMILAR 10, c = 0.1 SIMILAR 20, d = 2 SIMILAR 20, e = 0.01 SIMILAR 2, f = 0 SIMILAR 4 and g represents the number of oxygen atoms required for satisfying the valency requirement of the constituent elements, wherein the catalyst used is prepared by separately preparing solutions each of which contains the starting compound for the foregoing catalyst components, mixing these solutions within a short period of time, spray-drying the resulting mixture immediately after the mixing and then calcining the dried powder. A catalyst which further comprises 5 to 15% by weight of silica in addition to the foregoing composition is also used in the method. End products can be obtained in high conversion and selectivity through the use of the foregoing catalyst. Moreover, the catalyst is excellent in stability and has good reproducibility.

    53.
    发明专利
    未知

    公开(公告)号：DK0427287T3

    公开(公告)日：1995-10-02

    申请号：DK90121473

    申请日：1990-11-09

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HONDA TADATOSHI ,  KOTANI MAKOTO

    IPC: C07D209/68 ,  B01J23/50 ,  B01J23/89 ,  C07B61/00 ,  C07D209/04

    Abstract: A process is provided for the preparation of an indole from aniline or a derivative thereof and a polyhydric alcohol. The reaction is carried out in the presence of a catalyst composed of a carrier having a specific surface area of at least 10 m /g and silver supported on the carrier. The catalyst also contains as an additional component a specific amount of at least one element selected from Co, Fe and Ni. Deterioration in catalytic performance of the catalyst during the reaction and its regeneration are therefore minimized.

    54.
    发明专利
    未知

    公开(公告)号：DE69109746D1

    公开(公告)日：1995-06-22

    申请号：DE69109746

    申请日：1991-06-05

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HONDA TADATOSHI ,  HORIUCHI NOBUHIKO ,  MURAKAMI MASAMI ,  NAGAYAMA TOKIO ,  KITAGAWA JUN ,  KAWAHARA KAZUNORI

    IPC: B01J23/88 ,  C07C45/35 ,  C07C45/37 ,  C07C45/39 ,  C07C47/22

    Abstract: A method for preparing acrolein or methacrolein comprises subjecting propylene, secondary propanol, isobutylene or tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst represented by the following general formula (I): wherein X represents at least one element selected from the group consisting of Ni and Co; Y represents at least one element selected from the group consisting of K, Rb, Cs and Tl; and Z represents at least one element selected from the group consisting of Be, Mg, Ca, Sr, Ba, Ce, Ti, Zr, Nb, Cr, W, Mn, Cu, Ag, Zn, Cd, B, Al, Si, Ge, Sn, Pb, P, As, Sb, S, Se and Te; a, b, c, d, e, f and g each represents an atomic ratio of the corresponding element and when a is assumed to be 12, b = 0.1 SIMILAR 10, c = 0.1 SIMILAR 20, d = 2 SIMILAR 20, e = 0.01 SIMILAR 2, f = 0 SIMILAR 4 and g represents the number of oxygen atoms required for satisfying the valency requirement of the constituent elements, wherein the catalyst used is prepared by separately preparing solutions each of which contains the starting compound for the foregoing catalyst components, mixing these solutions within a short period of time, spray-drying the resulting mixture immediately after the mixing and then calcining the dried powder. A catalyst which further comprises 5 to 15% by weight of silica in addition to the foregoing composition is also used in the method. End products can be obtained in high conversion and selectivity through the use of the foregoing catalyst. Moreover, the catalyst is excellent in stability and has good reproducibility.

    55.
    发明专利
    未知

    公开(公告)号：DE69012279T2

    公开(公告)日：1995-02-02

    申请号：DE69012279

    申请日：1990-11-15

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HONDA TADATOSHI ,  TERADA KAZUHIRO

    IPC: B01J27/18 ,  C07B61/00 ,  C07C5/48 ,  C07C11/02 ,  C07C253/24 ,  C07C255/07 ,  C07C255/08

    Abstract: A method for preparing an unsaturated compound mainly comprising monoolefins, or a mixture of alpha , beta -unsaturated nitriles and monoolefins comprises bringing mixed gas which comprises paraffins and oxygen, or paraffins, oxygen and ammonia in contact with a catalyst which comprises (1) an oxide of phosphorus and (2) at least one oxide selected from the group consisting of indium oxide and tin oxide and optionally, in addition to the foregoing catalytic components, (3) at least one oxide selected from the group consisting of vanadium oxide, tungsten oxide and molybdenum oxide. The method makes it possible to prepare monoolefins, or a mixture of alpha , beta -unsaturated nitriles and monoolefins in high yield and high selectivity from cheap starting materials, namely paraffins.

Patent Agency Ranking