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    METHOD OF DYEING HYDROPHOBIC FIBER
    3.
    发明专利
    METHOD OF DYEING HYDROPHOBIC FIBER 失效

    公开(公告)号：JPS55110159A

    公开(公告)日：1980-08-25

    申请号：JP1728179

    申请日：1979-02-19

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： AIGA HIROSHI ,  ITOU NAOTO ,  FUJII SHIROU

    IPC: C09B29/039 ,  C09B29/08 ,  C09B29/09

    Abstract: NEW MATERIAL:Monoazo compounds of formula I (X is chlorine, bromin; R1 is 1-2C alkyl, beta-chloroethyl, 1-2C alkoxy). USE:These compounds dye hydrophobic fibers, e.g., polyester or cellulose acetate fibers, bright scarlet with high dyeability, build-up and sun-light fastness. They also have good discharge printing properties, thus being suitably used as a dye for ground dyeing. PREPARATION:2-Amino-4-chloro(or bromo)benzothiazole is diazotized and coupled with a compound of formula II or the diazo compound is coupled with N,N-dihydroxyethyl-m-chloroaniline. The resulting monoazo dye is made to react with a compound of formula III, acetic anhydride or propionic anhydride.

    SEPARATION OF 4*55DINITROCHRYSAZIN AND 4*88 DINITROANTHRARUFIN
    4.
    发明专利
    SEPARATION OF 4*55DINITROCHRYSAZIN AND 4*88 DINITROANTHRARUFIN 失效

    公开(公告)号：JPS55118443A

    公开(公告)日：1980-09-11

    申请号：JP2610179

    申请日：1979-03-08

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： FUJII SHIROU ,  AIGA HIROSHI ,  KAMICHI NOBUO

    IPC: C07C205/47 ,  C07C67/00 ,  C07C201/00

    Abstract: PURPOSE:To separate the title compounds useful as intermediates for bule disperse dye, mutually and readily, through the solubility difference in an aqueous alkali metal hydroxide. CONSTITUTION:4,5-Dinitrochrysazin and 4,8-dinitroanthrarufin or their alkali metal salts are separated mutually from their mixture through the solubility difference in an aqueous alkali metal hydroxide, without harmful mercury catalysts and separation of dinitroanthraquinone mixture in the method starting with the dinitration of anthraquinone. At first 4,5-dinitrochrysazin is dissolved in the aqueous solution as a salt at a lower concentration of the hydroxide, and then the salt is deposited at a higher concentration.

    SEPARATION OF MIXTURE OF 1*55 AND 1*88DINITROANTHRAQUINONE
    5.
    发明专利
    SEPARATION OF MIXTURE OF 1*55 AND 1*88DINITROANTHRAQUINONE 失效

    公开(公告)号：JPS55118442A

    公开(公告)日：1980-09-11

    申请号：JP2610079

    申请日：1979-03-08

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： FUJII SHIROU ,  AIGA HIROSHI ,  KAMICHI NOBUO

    IPC: C07C205/47 ,  C07C67/00 ,  C07C201/00

    Abstract: PURPOSE:To obtain the title isomers useful as starting materials for blue disperse dyes in high yield, readily and economically, by bringing crude dinitroanthraquinone mixture into contact with a small amount of a solvent, e.g. chlorobenzene. CONSTITUTION:1,5- and 1,8-Dinitroanthraquinone are separated, by bringing a dinitroanthraquinone mixture obtained through the dinitration of anthraquinone, most preferably in the mixing ratio of 1,5- to 1,8-isomers of 1:1, into contact with a solvent, e.g. mono- di-, or trichlorobenzene, solely or a mixture of two or more of these compounds, in an amount 2-10 times, preferably 3-8 times, that of the crude dinitroanthraquinone.

    SEPARATION OF 1*55DIPHENOXYANTHRAQUINONE AND 1*88 DIPHENOXYANTHRAQUINONE
    6.
    发明专利
    SEPARATION OF 1*55DIPHENOXYANTHRAQUINONE AND 1*88 DIPHENOXYANTHRAQUINONE 失效

    公开(公告)号：JPS55102535A

    公开(公告)日：1980-08-05

    申请号：JP876479

    申请日：1979-01-30

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： FUJII SHIROU ,  AIGA HIROSHI ,  KAMICHI NOBUO

    IPC: C07C50/34 ,  C07C45/00 ,  C07C46/10 ,  C07C67/00

    Abstract: PURPOSE:To prepare highly pure 1,5- and 1,8-diphenoxyanthraquinones useful as intermediates for production of dyes, separately, in high yield, by separating the mixture of 1,5- and 1,8-diphenoxyanthraquinones into the individual constituents, taking advantage of the difference of the solubilities and using a small amount of an inexpensive solvent in place of mercury. CONSTITUTION:An alcohol is added to the mixture of 1,5- and 1,8-diphenoxyanthraquinones obtained by the conventional phenoxylation. The alcohol is, e.g. methyl alcohol, ethyl alcohol, etc. The alcohol is slowly dropped into the mixture near the boiling point. The solution is cooled and filtered to give 1,5-diphenoxyanthraquinone having low solubility. 1,8-Diphenoxyanthraquinone having high solubility is deposited by cooling the filtrate or diluting it with an alchol and cooling the solution.

    PRECIPITATION OF ANTHRAQUINONE
    8.
    发明专利
    PRECIPITATION OF ANTHRAQUINONE 失效

    公开(公告)号：JPS5675449A

    公开(公告)日：1981-06-22

    申请号：JP15058779

    申请日：1979-11-22

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： SAKAI TSUNEHIRO ,  YOSHIURA KOUICHI ,  FUJII SHIROU

    IPC: C07C46/10 ,  C07C45/00 ,  C07C50/18 ,  C07C67/00 ,  C07C201/00 ,  C07C205/47

    Abstract: PURPOSE:To prepare a slurry of anthraquinone fine crystals in sulfuric acid, by dissolving anthraquinone in concentrated sulfuric acid with heating, and adjusting the concentration of sulfuric acid first by adding sulfuric acid of specific concentration, and if necessary adding dilute sulfuric acid or water to the solution. CONSTITUTION:Anthraquinone is dissolved completely in concentrated sulfuric acid (>=95%) by heating at 60-150 deg.C. The objective slurry of anthraquinone fine crystals in sulfuric acid can be obtained by adding first a sulfuric acid of 50-80% concentration to the solution at 50-120 deg.C to reduce the concentration of the sulfuric acid, and if necessary, adding a dilute sulfuric acid or water to the mixture at 50- 120 deg.C to adjust the concentration of the sulfuric acid to 95-70%. The anthraquinone may have a substituent group such as halogen, OH, alkyl, allyloxy, acylamino, etc. EFFECT:The use of the above fine crystalline slurry enables the smooth nitrification of anthraquinone.

    MONOAZO COMPOUND* ITS PREPARATION* AND DYEING OF SYNTHETIC FIBER
    9.
    发明专利
    MONOAZO COMPOUND* ITS PREPARATION* AND DYEING OF SYNTHETIC FIBER 失效

    公开(公告)号：JPS55116754A

    公开(公告)日：1980-09-08

    申请号：JP2453979

    申请日：1979-03-05

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： AIGA HIROSHI ,  ITOU NAOTO ,  FUJII SHIROU

    IPC: C09B29/085 ,  C09B29/08

    Abstract: NEW MATERIAL:A monoazo compound of formula I [when X is lower alkylsulfonyl, alkoxycarbonyl or cyano, Y is H or halogen; when X is H, Y is also H; T is H or lower (alkoxy)alkoxy; Z is lower alkyl, or lower alkoxy; R1 is lower (alkoxy) alkyl]. EXAMPLE:The compound of formula II. USE:Dyeing, padding and printing of synthetic fibers, especially aromatic polyester fibers. PROCESS:The objective compound of formula I is prepared by diazotizing the compound of formula III and coupling with the compound of formula IV.

    PREPARATION OF WATERRINSOLUBLE AZO DYE
    10.
    发明专利
    PREPARATION OF WATERRINSOLUBLE AZO DYE 失效

    公开(公告)号：JPS5599958A

    公开(公告)日：1980-07-30

    申请号：JP704479

    申请日：1979-01-26

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： AIGA HIROSHI ,  FUJII SHIROU ,  ITOU NAOTO

    IPC: C09B56/12 ,  C09B29/22

    Abstract: PURPOSE:To prepare the title novel dye for dyeing of synthetic fibers in greenish yellow color having excellent color fastness to daylight and fastness to sublimation, by diazotizing an alpha- or beta-aminoanthraquinone and coupling with a specific pyridone derivative. CONSTITUTION:A water-insoluble pyridone azo dye of formula III is prepared by diazotizing an alpha- or beta-aminoanthraquinone derivative, and coupling with a 3-cyano- 4-methyl-6-hydroxy-2-pyridone derivative of formula II (R is H, 1-12C alkyl, hydroxy-lower-alkyl, lower-alkoxy-lower-alkyl, lower-alcoxy-lower-alkoxy-lower- alkyl, lower-alkoxycabonyl-lower-alkyl, acyloxy-lower-alkyl, aryloxy-lower-alkyl, cyano-lower-alkyl, lower-alkylamino-lower-alkyl, halogeno-lower-alkyl, cycloalkyl, aralkyl, phenyl, or 2-4C alkenyl).

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