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183 records (took 0.028 seconds)

    61.
    发明专利
    未知

    公开(公告)号：RO83586A

    公开(公告)日：1984-04-02

    申请号：RO10523681

    申请日：1981-09-04

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HONDA TADATOSHI ,  ITOH HIROSHI ,  SATTO JUN ,  MITSUISHI TOKATOSHI

    IPC: B01D21/01 ,  C07C233/09 ,  C08F2/00 ,  C08F2/10 ,  C08F2/16 ,  C08F20/52 ,  C08F20/56 ,  C08F220/56

    Abstract: Polyacrylamide useful as a high- molecular-weight, water-soluble cationic flocculant, is produced by polymerizing acrylamide which is substantially free from N-acryloyl acrylamide with a minor amount of cationic monomer. Crude acrylamide is preferably obtained by catalytic hydration of acrylonitrile with water in the presence of a metallic copper catalyst at a pH in the range of from 4 to 10, and then rendered substantially free from N-acryloyl acrylamide by physical adsorption, reactive adsorption, decomposition by a chemical reaction or a solvent extraction.

    64.
    发明专利
    未知

    公开(公告)号：DE3248986T1

    公开(公告)日：1983-10-20

    申请号：DE3248986

    申请日：1982-08-25

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HONDA TADATOSHI ,  TERADA KAZUHIRO

    IPC: C07B61/00 ,  C07D209/08

    Abstract: PCT No. PCT/JP82/00337 Sec. 371 Date Apr. 22, 1983 Sec. 102(e) Date Apr. 22, 1983 PCT Filed Aug. 25, 1982 PCT Pub. No. WO83/00691 PCT Pub. Date Mar. 3, 1983.Preparation process of indole from aniline and ethylene glycol. Upon preparing indole by reacting aniline and ethylene glycol in a gas phase and in the presence of a catalyst, ethylene glycol is charged in portions to a multiplicity of catalyst stages formed by dividing a catalyst bed and connected in series. This divided supply of ethylene glycol permits the suppresing of the decomposition of ethylene glycol, even if the molar ratio of feed aniline to total feed ethylene glycol is small. The above process permits making the yield of indole large and reducing the amount of unreacted aniline to be separated and recovered from the reaction effluent.

    PROCESS FOR THE PREPARATION OF INDOLE AND DERIVATIVES THEREOF
    65.
    发明专利
    PROCESS FOR THE PREPARATION OF INDOLE AND DERIVATIVES THEREOF 未知

    公开(公告)号：CA1149397A

    公开(公告)日：1983-07-05

    申请号：CA375979

    申请日：1981-04-22

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： MATSUDA FUJIO ,  KATO TAKAZO ,  HONDA TADATOSHI

    IPC: B01J27/00 ,  C07D209/08 ,  C07D209/04

    Abstract: SPECIFICATION Title of the Invention Process for the Preparation of Indole and Derivatives Thereof A process for the preparation of indole and derivatives thereof wherein an aniline is reacted with a 1,2glycol in the vapor phase, the liquid phase or a mixed vapor-liquid phase. A salt of a metal of group IIa of the periodic table, a salt of iron, a salt of cobalt and/or a salt of nickel are used as the catalyst for this reaction. The present invention makes it possible to prepare indole and derivatives thereof in a single step by using inexpensive compounds as the starting materials.

    69.
    发明专利
    未知

    公开(公告)号：DE69119035T2

    公开(公告)日：1996-10-02

    申请号：DE69119035

    申请日：1991-11-14

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HONDA TADATOSHI ,  HORIUCHI NOBUNHIKO ,  KITAGAWA JUN ,  MURAKAMI MASAMI ,  KAWAHARA KAZUNORI ,  IO HIROFUMI

    IPC: B01J27/199 ,  B01J27/24 ,  C07C51/25 ,  F16G5/16

    Abstract: A composite oxide catalyst represented by the general formula: Mo-V-P-X-Y (wherein X represents at least one element selected from the group consisting of Sb, Cu, Co, Bi and As; Y represents at least one element selected from the group consisting of K, Rb, Cs and Tl) and a method for preparing methacrylic acid through gas phase catalytic oxidation of methacrolein with molecular oxygen in the presence of the foregoing catalyst are herein disclosed. The catalyst exhibits excellent catalytic activity, selectivity to methacrylic acid, catalytic stability and lifetime.

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