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    PRODUCTION OF DIAMINODIHYROXYANTHRAQUINONE
    1.
    发明专利
    PRODUCTION OF DIAMINODIHYROXYANTHRAQUINONE 失效

    公开(公告)号：JPS5533407A

    公开(公告)日：1980-03-08

    申请号：JP10484378

    申请日：1978-08-30

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： SAKAI TSUNEHIRO ,  YOSHIURA KOUICHI

    IPC: C09B1/503 ,  C07C67/00 ,  C07C213/00 ,  C07C225/36

    Abstract: PURPOSE:Nitrated diphenoxyanthraquinone is hydrolyzed with alkali and, without isolation, the resulting dinitrodihydroxyanthraquinone is reduced to produce readily title compound in high yield. CONSTITUTION:A nitrated diphenoxyanthraquinone as nitrated 1,5-diphenoxyanthraquinone is hydrolyzed with caustic alkali in an aqeuous solvent and the resulting mixture contaning dinitrodihydoxyanthraquinone and dinitrophenol is derectly reduced with a reducing reagent as sodium sulfide or by catalytic hydrogenation without isolation of the product to give diaminodihydroxyanthraquinone and diaminophenol. The reaction mixture is made acidic or alkaline and filtered to isolate the objective compound. After insloation of the diaminophenol or without isolation the filtrate is subjected to usual water disposal. EFFECT:The total volume of waste water is reduced and this process is very economic.

    PRODUCTION OF DIANTHRAQUINONE-N,N'-DIHYDROAZINE
    2.
    发明专利
    PRODUCTION OF DIANTHRAQUINONE-N,N'-DIHYDROAZINE 失效

    公开(公告)号：JPH07233330A

    公开(公告)日：1995-09-05

    申请号：JP13675894

    申请日：1994-06-20

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： YAMANO KATSUHIKO ,  OKUMA TADASHI ,  TAKUMA HIROSUKE ,  SAKAI TSUNEHIRO

    IPC: C09B5/48

    Abstract: PURPOSE:To obtain dianthraquinone-N,N'-dihydroazine having high quality in a short time in high yield by adding a phasetransfer catalyst in the condensation reaction of an aminoanthraquinone with an alkaline condensation agent in the presence of a dialkyl-imidazolidinone. CONSTITUTION:This dianthraquinone-N,N'-dihydroazine is produced by adding a phase-transfer catalyst (preferably a quaternary ammonium compound such as benzyltrimethyl ammonium hydroxide, etc.) to a reaction system in the reaction of 1-aminoanthraquinone with an alkaline condensation agent (e.g. NaOH) in the presence of a 1,3-dialkyl-2-imidazolidinone. The amount of the catalyst is preferably 0.01-10mol% based on 1-aminoanthraquinone in the case of using a quaternary ammonium compound as the catalyst and that of the alkaline condensation agent is 0.8-5mol based on l mol of the 1-aminoanthraquinone. The reaction is preferably carried out at 90-160 deg.C.

    PRODUCTION OF VAT DYE
    3.
    发明专利
    PRODUCTION OF VAT DYE 失效

    公开(公告)号：JPS61204272A

    公开(公告)日：1986-09-10

    申请号：JP4559385

    申请日：1985-03-07

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： SHIMOYAMA AKITO ,  KURODA YOSHITAKA ,  SAKAI TSUNEHIRO

    IPC: C09B3/80 ,  C09B3/82

    Abstract: PURPOSE:To obtain Vat Black 9 vat dye, with decreased amount of solvent, by reacting tetrahalogenopyranthrone, 1-aminoanthraquinone and aminobenzan throne under specific conditions. CONSTITUTION:The objective dye can be produced by reacting tetrahalogeno- pyranthrone with 1-aminoanthraquinone and aminobenzanthrone in an aqueous medium containing preferably

    PRODUCTION OF DIANTHRAQUINONE-N, N-DIHYDROAZINE
    4.
    发明专利
    PRODUCTION OF DIANTHRAQUINONE-N, N-DIHYDROAZINE 失效

    公开(公告)号：JPS601169A

    公开(公告)日：1985-01-07

    申请号：JP10678983

    申请日：1983-06-16

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： KATOU KIMITOSHI ,  AIGA HIROSHI ,  MIKOTA TAMIO ,  SAKAI TSUNEHIRO

    IPC: C07D241/38 ,  C07D239/70

    Abstract: PURPOSE:To produce the titled substance useful as a vat dye, in high yield and quality, by condensing 1-aminoanthraquinone in the presence of 1,3-dimethyl-2- imidazolidinone using an oxidizing agent and an alkaline condensation agent. CONSTITUTION:1-Aminoanthraquinone is condensed in the presence of an oxidizing agent (e.g. air, oxygen, etc.) using 0.2-2.5 times weight, based on the raw material, of an alkaline condensation agent (preferably KOH) to obtain the titled substance. The reaction is carried out in the presence of 1.0-3.0 times weight, based on the raw material, of 1,3-dimethyl-2-imidazolidine, at 80-150 deg.C. Since 1,3-dimethyl-2-imidazolidinone is stable under alkaline condition, it can be recovered by distillation under atmospheric or reduced pressure or by solvent extraction.

    PRODUCTION OF DIANTHRAQUINONE-N,N'-DIHYDROAZINE
    9.
    发明专利
    PRODUCTION OF DIANTHRAQUINONE-N,N'-DIHYDROAZINE 失效

    公开(公告)号：JPS6225167A

    公开(公告)日：1987-02-03

    申请号：JP16283985

    申请日：1985-07-25

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HIRAYAMA AKIRA ,  KATO KIMITOSHI ,  SAKAI TSUNEHIRO

    IPC: C09B5/48

    Abstract: PURPOSE:To obtain in high yield the titled high-qualitay compound, by subjecting aminoanthraquinone in the presence of dimethylimidazolidinone to condensation reaction and treating wet filter cake with an aqueous solution of methanol. CONSTITUTION:(A) 1-Aminoanthraquinone is subjected to condensation reaction in the presence of (B) 1,3-dimethyl-2-imidazolidinone at an elevated temperature by the use of (C) (i) an oxidizing agent such as air, oxygen, etc., and (ii) an alkali condensation agent such as potassium hydroxide, etc. The prepared reaction solution and wet filter cake containing the condensation reaction product are treated with >=50wt% aqueous solution of methanol and 1,3-dimethyl-2- imidazolidinone in the treated solution is distilled and recovered, to give the aimed compound.

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