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    Process for the preparation of metallizable azo dyes carrying out coupling in an inert gas atmosphere in the presence of an ammonium salt
    1.
    发明授权
    Process for the preparation of metallizable azo dyes carrying out coupling in an inert gas atmosphere in the presence of an ammonium salt 失效
    制备在惰性气体气氛中在铵盐存在下进行偶联的可镀金属偶氮染料的方法

    公开(公告)号：US4994561A

    公开(公告)日：1991-02-19

    申请号：US536054

    申请日：1990-06-08

    Applicant: Hans P. Joswig ,  Werner Huber

    Inventor： Hans P. Joswig ,  Werner Huber

    IPC: C09B29/01 ,  C09B29/15 ,  C09B41/00

    CPC classification number: C09B29/0014 ,  C09B29/103 ,  C09B41/00 ,  C09B41/004 ,  Y10S534/07

    Abstract: A process for the preparation of an azo dye of formula ##STR1## wherein K is the .beta.-naphthol radical, X is hydrogen or nitro and M is an alkali metal ion or an ammonium ion, which process comprises coupling an aqueous solution containing 15 to 30 percent by weight of a diazo component of formula ##STR2## and 6 to 20 mol % of an ammonium salt, based on the molar amount of the diazo component, at a pH in the range from 10.5 to 11.5 and in an inert gas atmosphere, to a coupling component of formula ##STR3## in which formulae (2) and (3) above K and X are as defined for formula (1).The present invention makes it possible to obtain the claimed azo dyes in high yield.

    Abstract translation: 一种制备式（1）的偶氮染料的方法，其中K是β-萘酚基，X是氢或硝基，M是碱金属离子或铵离子，该方法包括将水溶液 含有15至30重量％的式（2）的重氮组分和6至20mol％的铵盐，基于重氮组分的摩尔量，在10.5至11.5的pH范围内 在惰性气体气氛中，与式（3）的偶合组分相同，其中K和X上的式（2）和（3）如式（1）所定义。 本发明使得可以高产率地获得所要求的偶氮染料。

    Process for preparing p-[[p-(phenylazo)phenyl]azo]phenol
    2.
    发明授权
    Process for preparing p-[[p-(phenylazo)phenyl]azo]phenol 失效
    制备p- {8 {对 - （苯基偶氮）苯基{9偶氮{9苯酚}的方法

    公开(公告)号：US4141892A

    公开(公告)日：1979-02-27

    申请号：US821950

    申请日：1977-08-04

    Applicant: Edgar E. Renfrew ,  Roy E. Smith

    Inventor： Edgar E. Renfrew ,  Roy E. Smith

    IPC: C09B31/062 ,  C09B41/00 ,  C09B31/06

    CPC classification number: C09B41/00 ,  C09B31/062

    Abstract: A process for preparing the compound, or dye, ##STR1## by forming aminoazobenzene employing a slight excess of sodium nitrite in the diazotization of aniline and, without isolation, diazotizing the monoazo base and coupling the diazonium salt into phenol.

    Abstract translation: 通过在苯胺的重氮化中使用略过量的亚硝酸钠形成氨基偶氮苯，并且在不分离下重氮化单偶氮碱并将重氮盐偶联到苯酚中来制备化合物或染料的方法。

    Coupling process for substituted aminoazobenzenesulfonic acids
    3.
    发明授权
    Coupling process for substituted aminoazobenzenesulfonic acids 失效
    取代氨基偶氮苯磺酸的偶联方法

    公开(公告)号：US3887540A

    公开(公告)日：1975-06-03

    申请号：US20156771

    申请日：1971-11-23

    Applicant: DU PONT

    Inventor： BELLETTINI ARTURO GABRIEL ,  FRANKLIN RICHARD CRAWFORD

    IPC: C09B29/08 ,  C09B41/00 ,  C07C107/06 ,  C09B29/26

    CPC classification number: C09B29/08 ,  C09B29/0808 ,  C09B41/00

    Abstract: An arylaminosulfonic acid is diazotized in a mineral acid with sodium nitrite, the pH at completion of diazotization being below about 0.5. An aryl, primary amino-group-containing coupler is added to the diazotization mass and coupling to the benzene ring completed in at least three stages by gradually raising the temperature to 20*-30*C., maintaining a pH below 1.5.

    Abstract translation: 芳基氨基磺酸在无机酸中与亚硝酸钠重氮化，重氮化完成时的pH低于约0.5。 向重氮化物质中加入芳基，含伯氨基的成色剂，并通过将温度逐渐升高至20℃-30℃，保持pH值低于1.5，将其与至少三个阶段完成的苯环偶联。

    Diarylide pigment compositions
    4.
    发明授权
    Diarylide pigment compositions 失效
    DIARYLIDE颜料组合物

    公开(公告)号：US3776749A

    公开(公告)日：1973-12-04

    申请号：US3776749D

    申请日：1971-05-06

    Applicant: CIBA GEIGY AG

    Inventor： MC KAY R ,  BRADLEY G

    IPC: C09B35/10 ,  C09B41/00 ,  C09B67/00 ,  C09B67/22 ,  C08H17/44

    CPC classification number: C09B41/00 ,  C09B35/10 ,  C09B67/00 ,  C09B67/0033

    Abstract: A process in which a diarylide pigment composition is produced by coupling a tetrazotised pigment benzidine with a pigment coupling agent, preferably an acetoacetarylamide, and incorporating in the pigment a water-soluble coupled diarylide dyestuff, preferably prior to the isolation and drying of the pigment, and the diarylide pigment composition having better colour strength and transparency properties than conventional diarylide pigments when incorporated in printing inks.

    Preparation of disazo j acid urea dyestuffs
    5.
    发明授权
    Preparation of disazo j acid urea dyestuffs 失效
    灭菌酸尿素试剂的制备

    公开(公告)号：US3681320A

    公开(公告)日：1972-08-01

    申请号：US3681320D

    申请日：1970-01-13

    Applicant: DU PONT

    Inventor： FRANKLIN RICHARD C

    IPC: C09B33/10 ,  C09B41/00 ,  C09B33/02

    CPC classification number: C09B33/10 ,  C09B41/00

    Abstract: PREPARATION OF STORAGE-STABLE AQUEOUS SOLUTIONS CONTAINING 10-25 WEIGHT PRECENT OF A DISAZO J ACID UREA DYE BY COUPLING AN ARYL DIAZONIUM SALT, FOR EXAMPLE, A SALT FROM BROENNER''S ACID, AND J ACID UREA, AT A MOLAR RATIO OF ABOUT 2:1, IN AN AQUEOUS MEDIUM, AT A PH OF ABOUT 3-9, AT A TEMPERATURE OF ABOUT 0-65*C., IN THE PRESENCE OF TRIETHANOLAMINE AS THE ACID ACCEPTOR.

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