CH252294A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH252294A
CH252294A CH252294DA CH252294A CH 252294 A CH252294 A CH 252294A CH 252294D A CH252294D A CH 252294DA CH 252294 A CH252294 A CH 252294A
Authority
CH
Switzerland
Prior art keywords
dye
yellow
water
treatment
disazo dye
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 CH252294A publication Critical patent/CH252294A/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

  

  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     3-Methogy-l-aminobenzol    erhält  liche     Amnnoazofarbstoff    durch     Behandeln     mit     Phosgen        in.    das     Harnstoffderivat    über  geführt     wird.     



       Beispiel:     Der aus der     Diazoverbindung    von 23,3  Teilen     4-Amino-6-sulfosalicylsäure    und 12,3  Teilen     3-Methogy-l-aminobenzol    durch Kup  peln hergestellte     Aminoazofarbstoff    wird in  1000 Teilen heissem Wasser unter Zusatz von  überschüssiger Soda gelöst, durch     Filtration          geklärt    und bei     neutraler,    schwach alkali  scher oder essigsaurer Reaktion so lange     mit          Phosgen    behandelt, bis er sich völlig in das       Harnstoffderivat    verwandelt hat,

       welches     sich aus der     Lösung    abscheidet. Hierauf     wird     filtriert und getrocknet. Der Farbstoff färbt  Baumwolle und     regenerierte        Cellulose        in    gel  ben, rein weiss     ätzbaren    Tönen, welche beim    Nachbehandeln mit     Kupferformiat    und     nass-          echtheitsverbessernden,    hochmolekularen, was  serlöslichen Basen voller und gut wasch-,  Wasser- und lichtecht     werden.  



  Process for the preparation of a disazo dye. The present patent relates to a process for the production of a disazo dye and is characterized in

   that the amnnoazo dye obtained by coupling 4-diazo-6-sulfosalicylic acid to 3-methogy-1-aminobenzene is converted into the urea derivative by treatment with phosgene.



       Example: The aminoazo dye produced by Kup peln from the diazo compound of 23.3 parts of 4-amino-6-sulfosalicylic acid and 12.3 parts of 3-methogy-1-aminobenzene is dissolved in 1000 parts of hot water with the addition of excess soda by filtration clarified 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 dye dyes cotton and regenerated cellulose in yellow, pure white, etchable shades, which when treated with copper formate and high-molecular, water-soluble bases that improve the wet fastness become fuller and more washable, water- and lightfast.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Disazofarbstoffes, dadurch gekennzeichnet, dass der durch Kuppeln von. 4-Diazo-6-sulfo- sa-licylsäure auf 3-Methogy-l-aminobenzol er hältliche Aminoazofarbstoff durch Behan deln mit Phosgen in das Harnstoffderivat übergeführt wird. Der Farbstoff .stellt ein braungelbes Pul ver dar. PATENT CLAIM: Process for the production of a new disazo dye, characterized in that the by coupling of. 4-Diazo-6-sulfosalicylic acid on 3-methogy-1-aminobenzene available aminoazo dye is converted into the urea derivative by treatment with phosgene. The dye is a brown-yellow powder. Er löst sich in Wasser mit gelber, in konzentrierter Schwefelsäure mit gelb roter Farbe und färbt Baumwolle und regene rierte Cellulose in gelben, rein weiss ätzbaren Tönen, welche beim Nachbehandeln mit Kupf erf ormiat und nassechtheitsverbessernden hochmolekularen, wasserlöslichen Basen vol ler und gut wasch-, Wasser- und lichtecht werden. It dissolves in water with a yellow color, in concentrated sulfuric acid with a yellow-red color and dyes cotton and regenerated cellulose in yellow, pure white, etchable shades, which after treatment with copper and high-molecular, water-soluble bases that improve the wetness, are fuller and washable. Become water and lightfast.
CH252294D 1946-01-14 1946-01-14 Process for the preparation of a disazo dye. CH252294A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH246986T 1946-01-14
CH252294T 1946-01-14

Publications (1)

Publication Number Publication Date
CH252294A true CH252294A (en) 1947-12-15

Family

ID=25729168

Family Applications (1)

Application Number Title Priority Date Filing Date
CH252294D CH252294A (en) 1946-01-14 1946-01-14 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH252294A (en)

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