中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

24 records (took 0.025 seconds)

    PRODUCTION OF VAT DYE
    15.
    发明专利
    PRODUCTION OF VAT DYE 失效

    公开(公告)号：JPS568455A

    公开(公告)日：1981-01-28

    申请号：JP8392479

    申请日：1979-07-04

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： TORISU YASUYOSHI ,  IWAMURA AKIO ,  ABE KENJI ,  WATANABE TETSUO ,  TAKENAKA YOSHIHIRO

    IPC: C09B5/48

    Abstract: PURPOSE:To produce a vat dye of good quality in high yield, by a method wherein 1-aminoanthraquinone is condensed with an alkaline condensation agent to obtain a reaction product which is then chlorinated directly in a sulfuric acid solvent, and then impurities are removed from the resulting product. CONSTITUTION:1-Aminoanthraquinone is condensed in the presence of dimethylformamide and an oxidizing agent by the action of an alkaline condensation agent. The reaction mixt. is diluted with water or an org. solvent and filtered to obtain a reaction product which is then dissolved in a sulfuric acid solvent. Chlorine gas is passed through the resulting soln. to chlorinate the reaction product. Impurities are removed by adjusting the concentration of sulfuric acid to obtain the desired vat dye of the formula (wherein n is 1, 2). By this process, an after-treatment stage can be deleted in which indanthrone is derived from the condensation product obtd. from 1-aminoanthraquinone by using the alkaline condensation agent.

    PREPARATION OF HIGHHPURITY 11AMINOANTHRAQUINONE
    16.
    发明专利
    PREPARATION OF HIGHHPURITY 11AMINOANTHRAQUINONE 失效

    公开(公告)号：JPS5446767A

    公开(公告)日：1979-04-12

    申请号：JP11325377

    申请日：1977-09-22

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： MORI HIDETOSHI ,  HIRAI HIROSHI ,  YANO NAOYUKI ,  KAWAKAMI MICHIO ,  IWAMURA AKIO ,  YOSHIURA KOUICHI ,  NAKAMURA KATSUJI

    IPC: C07C225/34

    Abstract: PURPOSE:To obtain titled high-purity compound useful as an intermediate for anthraquinone and vat dyes and pigments, using a hydrogenation catalyst consiting of palladium or/and platinum. Deposited on an oleophilic carbon carrier. CONSTITUTION:1-Nitroanthraquinone is catalytically hydrogenated by the use of catalyst condtituting of one or two types of noble metals selected from palladium and platinum deposited on an olephilic carbon carrier (nonporous carbon having an linseed oil absorption of 100 parts by vol. or more, preferably 150 parts by vol. or more per 100 parts by wt., of the carbon and a surface area of 20-100m /g), preferably in water or its mixture with an organic slovent as a medium in the presence of a base to give the objective 1-aminoanthraquinone without fear of perhy drogenation.

Patent Agency Ranking