CH300776A - A process for preparing a disazo dye. - Google Patents

A process for preparing a disazo dye.

Info

Publication number
CH300776A
CH300776A CH300776DA CH300776A CH 300776 A CH300776 A CH 300776A CH 300776D A CH300776D A CH 300776DA CH 300776 A CH300776 A CH 300776A
Authority
CH
Switzerland
Prior art keywords
yellow
preparing
methyl
pyrazolone
acid
Prior art date
Application number
Other languages
French (fr)
Inventor
Sandoz S A
Original Assignee
Sandoz Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandoz Sa filed Critical Sandoz Sa
Publication of CH300776A publication Critical patent/CH300776A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/12—Disazo dyes from other coupling components "C"
    • C09B31/14—Heterocyclic components

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Procédé de préparation d'un colorant     disazoïque.       Le présent brevet a pour objet un procédé  de préparation d'un colorant     disazoïque.Ce     procédé est caractérisé en ce que l'on     diazote     une molécule d'acide     4'-(4"-aminobenzo3#1-          amino)-1,1'-azobenzène-4,3!-disulfonique,    puis  on copule le     diazoïque    ainsi obtenu avec une  molécule de     1-(3'-aminophényl)-3-méthyl-5-          pyrazolone.     



       Exemple:     On     dissout    47,6 parties d'acide     4'-(4"-          aminobenzoylamino)-1,1'-        azobenzène    =     4,3'-di-          sulfonique    dans 250 parties d'eau à l'aide  d'hydroxyde de sodium et on introduit lente  ment la solution dans un mélange de 45     par-          ties        d'acide        chlorhydrique    à     30        %        et        100        par-          ties    de 

  glace, de faon que la température se  maintienne     finalement    à<B>5-10".</B> Une fois la       diazotation        terminée,    on fait     couler    lentement,  en l'espace de 30     minutes,    la     suspension    du       diazoïque    dans une solution de 18,9 parties  de     1-(3'-aminophényl)-3-méthyl-5-pyrazoloite     dans 200 parties d'eau et 4 parties d'hy  droxyde de sodium, contenant une quantité       suffisante    de carbonate de sodium pour main  tenir une réaction alcaline durant toute la  copulation.

   Quand la copulation est achevée,  on     relargue    le nouveau colorant à 70 , on le  filtre et on le sèche.  



  Le nouveau colorant se présente sous  forme     d'une    poudre jaunie qui se     dissout    dans    l'eau avec une coloration jaune et     dans    l'acide  sulfurique concentré avec     une,        coloration     orangée.

   Il teint le coton et la cellulose régé  nérée en des nuances     jaunes    vives;     diazoté     sur la fibre et développe avec la     3-méthyl-5-          pyrazolone    ou le     2-hydroxynaphtalène,    il  fournit     des    nuances jaunes à     jaune    orangé  possédant     une    solidité au lavage améliorée  ainsi qu'une bonne     rongeabilité.  



  A process for preparing a disazo dye. The present patent relates to a process for preparing a disazo dye. This process is characterized in that a 4 '- (4 "-aminobenzo3 # 1- amino) -1,1' acid molecule is dinitrogenated. -azobenzene-4,3! -disulfonic acid, then the diazo thus obtained is copulated with a molecule of 1- (3'-aminophenyl) -3-methyl-5-pyrazolone.



       Example: 47.6 parts of 4 '- (4 "- aminobenzoylamino) -1,1'-azobenzene = 4,3'-disulfonic acid are dissolved in 250 parts of water using sodium hydroxide. sodium and the solution is slowly introduced into a mixture of 45 parts 30% hydrochloric acid and 100 parts

  ice, so that the temperature is finally maintained at <B> 5-10 ". </B> Once the diazotization is complete, the suspension of the diazo is slowly poured over the course of 30 minutes into a solution of 18.9 parts of 1- (3'-aminophenyl) -3-methyl-5-pyrazoloite in 200 parts of water and 4 parts of sodium hydroxide, containing a sufficient amount of sodium carbonate to maintain a reaction alkaline throughout copulation.

   When coupling is complete, the new dye is salted out at 70, filtered and dried.



  The new dye comes in the form of a yellow powder which dissolves in water with a yellow coloring and in concentrated sulfuric acid with an orange coloring.

   It dyes cotton and regenerated cellulose in bright yellow shades; Diazotized on the fiber and develops with 3-methyl-5-pyrazolone or 2-hydroxynaphthalene, it provides yellow to orange-yellow shades with improved wash fastness as well as good rongeability.

Claims (1)

REVENDICATION Procédé de préparation d'un colorant di- sazoïque, caractérisé en ce que l'on diazote une molécule d'acide' 4'-(4"-aminobenzoyl- amino)-1,1'-azobenzène-4,3'-disulfonique, puis on copule le diazoque ainsi obtenu avec une molécule de 1- (3'-aminophényl) CLAIM Process for preparing a diszoic dye, characterized in that one diazotizes a molecule of acid '4' - (4 "-aminobenzoyl-amino) -1,1'-azobenzene-4,3'- disulfonic acid, then the diazoque thus obtained is copulated with a 1- (3'-aminophenyl) molecule -3-méthyl-5- pyrazolone. Le nouveau colorant se présente sous forme d'une poudre jaune qui se dissout dans l'eau avec une coloration jaune et dans l'acide sulfurique concentré avec une coloration orangée. -3-methyl-5-pyrazolone. The new dye comes in the form of a yellow powder which dissolves in water with a yellow color and in concentrated sulfuric acid with an orange color. Il teint le coton et la cellulose régé nérée en des nuances jaunes vives; diazoté sur la fibre et développé avec la 3-méthyl-5-pyra- zolone ou le 2-hydmoxynaphtalène, il fournit des nuances jaunes à jaune orangé possédant une solidité au lavage améliorée ainsi qu'une bonne rongeabilité. He dyes cotton and regenerated cellulose in bright yellow shades; Diazotized on the fiber and developed with 3-methyl-5-pyrazolone or 2-hydmoxynaphthalene, it provides yellow to orange-yellow shades having improved wash fastness as well as good rongeability.
CH300776D 1951-04-27 1951-04-27 A process for preparing a disazo dye. CH300776A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH290300T 1951-04-27
CH300776T 1951-04-27

Publications (1)

Publication Number Publication Date
CH300776A true CH300776A (en) 1954-08-15

Family

ID=25732980

Family Applications (1)

Application Number Title Priority Date Filing Date
CH300776D CH300776A (en) 1951-04-27 1951-04-27 A process for preparing a disazo dye.

Country Status (1)

Country Link
CH (1) CH300776A (en)

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