CH252296A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH252296A
CH252296A CH252296DA CH252296A CH 252296 A CH252296 A CH 252296A CH 252296D A CH252296D A CH 252296DA CH 252296 A CH252296 A CH 252296A
Authority
CH
Switzerland
Prior art keywords
water
dye
yellow
disazo dye
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH252296A publication Critical patent/CH252296A/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
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • C09B43/12—Preparation of azo dyes from other azo compounds by acylation of amino groups
    • C09B43/136—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents
    • C09B43/14—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents with phosgene or thiophosgene

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

Description

  

      Zusatzpatent    zum     Hauptpatent    Nr.<B>246986.</B>    Verfahren zur Herstellung     eines        Disazofarbstoffes.       Das vorliegende Patent betrifft ein Ver  fahren zur Herstellung eines     Disazofarbstof-          fes    und     ist    dadurch     gekennzeichnet,    dass der  durch Kuppeln von     4-Diazo-6-sulfosalicyl-          säure    auf     2,

  5-Dimethyl-l-aminobenzol    erhält  liche     Aminoazofarbstoff    durch     Behandeln     mit     Phosgen    in das     Harnstoffderivat    über  geführt wird.  



  <I>Beispiel:</I>  Der aus der     Diazoverbindung    von 23,3  Teilen     4-Amino-6-sulfosalicylsäure    und 12,1  Teilen     2,5-Dimethyl-l-aminobenzol    durch  Kuppeln hergestellte     Aminoazofarbstoff    wird  in 1000 Teilen heissem Wasser unter Zusatz  von überschüssiger Soda gelöst, durch Filtra  tion geklärt und bei neutraler, schwach alka  lischer oder essigsaurer     Reaktion    so lange  mit     Phosgen    behandelt, bis er ;sich völlig in  das     Harnstoffderivat    verwandelt hat, wel  ches sich aus der Lösung abscheidet. Hierauf  wird filtriert und getrocknet. Der neue Farb  stoff stellt ein     bräunlichgelbes    Pulver dar.

    Er löst sich in Wasser mit gelber, in     konzen-          trierter    Schwefelsäure mit     roter    Farbe und  färbt Baumwolle und     regenerierte        Cellulose       in gelben, rein weiss     ätzbaren    Tönen, welche  beim Nachbehandeln mit     Kupferformiat        und          nassechtheitsverbessernden,    hochmolekularen,  wasserlöslichen Basen voller und gut wasch-,  Wasser- und     lichtecht    werden.



      Additional patent to main patent no. <B> 246986. </B> Process for the production of a disazo dye. The present patent relates to a process for the production of a disazo dye and is characterized in that the by coupling of 4-diazo-6-sulfosalicylic acid to 2,

  5-Dimethyl-1-aminobenzene is obtained Liche aminoazo dye by treatment with phosgene in the urea derivative.



  <I> Example: </I> The aminoazo dye produced by coupling the diazo compound of 23.3 parts of 4-amino-6-sulfosalicylic acid and 12.1 parts of 2,5-dimethyl-l-aminobenzene is poured into 1000 parts of hot water Addition of excess soda, clarified by filtration and treated with phosgene in a neutral, weakly alkaline or acetic acid reaction until it has completely transformed into the urea derivative, which separates out of the solution. It is then filtered and dried. The new dye is a brownish-yellow powder.

    It dissolves in water with a yellow color, in concentrated sulfuric acid with a red color and dyes cotton and regenerated cellulose in yellow, pure white etchable shades, which when treated with copper formate and high-molecular, water-soluble bases, are full and easily washable. and become lightfast.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass der durch Kuppeln von 4-Diazo-6-sulfosalicyl- säure auf 2,5-Dimethyl-l-aminobenzol erhält liche Aminoazofarbstoff durch Behandeln mit Phosgen- in das -T-Iarns:toffdekvat Über geführt wird. Der neue Farbstoff stellt ein bräunlich- gelbes Pulver dar. PATENT CLAIM: Process for the production of a disazo dye, characterized in that the aminoazo dye obtained by coupling 4-diazo-6-sulfosalicylic acid onto 2,5-dimethyl-l-aminobenzene by treatment with phosgene is converted into the -T- Iarns: toffdekvat About is led The new dye is a brownish-yellow powder. Er löst sich in Wasser mit gelber, in konzentrierter Schwefelsäure mit roter Farbe und färbt Baumwolle und regenerierte Cellulose in gelben, rein weiss ätzbaren Tönen, welche beim Nachbehandeln mit gupferformiat und nassechtheitsverbes- sernden, hochmolekularen, wasserlöslichen Basen voller und gut wasch-, Wasser- und lichtecht werden. It dissolves in water with a yellow color, in concentrated sulfuric acid with a red color and dyes cotton and regenerated cellulose in yellow, pure white etchable shades, which when treated with copper formate and water-fastness-improving, high-molecular, water-soluble bases full and easily washable, water- and become lightfast.
CH252296D 1946-01-14 1946-01-14 Process for the preparation of a disazo dye. CH252296A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH252296T 1946-01-14
CH246986T 1946-01-14

Publications (1)

Publication Number Publication Date
CH252296A true CH252296A (en) 1947-12-15

Family

ID=25729170

Family Applications (1)

Application Number Title Priority Date Filing Date
CH252296D CH252296A (en) 1946-01-14 1946-01-14 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH252296A (en)

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