CH299201A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH299201A
CH299201A CH299201DA CH299201A CH 299201 A CH299201 A CH 299201A CH 299201D A CH299201D A CH 299201DA CH 299201 A CH299201 A CH 299201A
Authority
CH
Switzerland
Prior art keywords
monoazo dye
amino
red
preparation
dichloro
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 J R Geigy filed Critical Ag J R Geigy
Publication of CH299201A publication Critical patent/CH299201A/en

Links

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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren     zur        Herstellung        eines        Monoazofarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur     Herstellung    eines     Monoazo-          farbstoffes.    Das Verfahren ist dadurch ge  kennzeichnet, dass man die     Diazoverbindimg     von     2-Amino-2',4-dichlor-1,1'-diphenylsulfid    in  saurem     Mediiun    mit     2-Amino-8-oxy-naphtha-          lin-6-sulfonsäure    kuppelt.  



  Der erhaltene neue     Monoazofarbstoff    stellt  ein     dunlie        ötes    Pulver vor, das sich in war  mem Wasser mit roter und in konzentrierter  Schwefelsäure mit blauvioletter Farbe löst  und Wolle aus neutralem oder schwach saurem  Bade in blaustichig roten Tönen färbt.

           Beispiel:     27 Teile     2-Amino-2',4-dichlor-1,1'-diphenyl-          sulfid    werden in 135 Teilen Eisessig und 30  Teilen     30o/oiger    Salzsäure gelöst     und    mit 6,9  Teilen     Natriumnitrit        diazotiert.    Man verdünnt  mit Wasser und lässt     zur        Diazolösung    eine  schwach essigsauer gestellte, wässerige Lösung  des     Natronsalzes    von 24 Teilen     2-Amino-8-oxy-          naphthalin-6-sulfosäure    einlaufen.

   Nach dem  Abstumpfen der Mineralsäure mit     verdünnter     Natronlauge bis zur schwach     lackmussauren     Reaktion wird der abgeschiedene     Monoazo-          farbstoff    der Formel  
EMI0001.0032     
         abfiltriert,    mit Kochsalzlösung gewaschen     und     getrocknet. Er stellt ein     dunkelrotes    Pulver  dar, das sich in warmem Wasser mit roter und  in     konzentrierter    Schwefelsäure mit blauvio  letter Farbe löst. Der Farbstoff ergibt auf  Wolle aus neutralem oder schwach saurem  Bade gefärbt, blaustichig rote Töne von sehr    guter Walk-, Seewasser- und guter Lichtecht  heit.



  Process for the preparation of a monoazo dye. The present patent relates to a process for the preparation of a monoazo dye. The process is characterized in that the diazo compound of 2-amino-2 ', 4-dichloro-1,1'-diphenyl sulfide is coupled in acidic medium with 2-amino-8-oxy-naphthalin-6-sulfonic acid.



  The new monoazo dye obtained is a dark powder which dissolves in warm water with red and in concentrated sulfuric acid with a blue-violet color and dyes wool from neutral or weakly acidic baths in bluish red tones.

           Example: 27 parts of 2-amino-2 ', 4-dichloro-1,1'-diphenyl sulfide are dissolved in 135 parts of glacial acetic acid and 30 parts of 30% hydrochloric acid and diazotized with 6.9 parts of sodium nitrite. It is diluted with water and an aqueous solution of the sodium salt of 24 parts of 2-amino-8-oxynaphthalene-6-sulfonic acid, which has been made weakly acidic in acetic acid, is run into the diazo solution.

   After the mineral acid has been blunted with dilute sodium hydroxide solution to the point of a weak lacquer acid reaction, the deposited monoazo dye is of the formula
EMI0001.0032
         filtered off, washed with brine and dried. It is a dark red powder that dissolves in warm water with red and in concentrated sulfuric acid with blue violet color. When dyed on wool from a neutral or weakly acidic bath, the dye results in bluish red shades of very good fullness, seawater and lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung -eines Monoazo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 2-Amino-2',4-dichlor- 1,1'-diphenylsulfid in saurem Meditun mit 2- Amino - 8 - oxy-naphthalin - 6 - sulfonsäure kup pelt. PATENT CLAIM: Process for the production of a monoazo dye, characterized in that the diazo compound of 2-amino-2 ', 4-dichloro-1,1'-diphenyl sulfide is mixed with 2-amino-8-oxy-naphthalene - 6 - sulfonic acid coupling. Der erhaltene neue Monoazofarbstoff stellt ein dunkelrotes Pulver vor, das sich in war men Wasser mit roter und in konzentrierter Schwefelsäure mit blauvioletter Farbe löst -und Wolle aus neutralem oder schwach sau rem Bade in blaustichig roten Tönen färbt. The new monoazo dye obtained is a dark red powder which dissolves in warm water with red and in concentrated sulfuric acid with a blue-violet color and dyes wool from neutral or slightly acidic baths in bluish red tones.
CH299201D 1951-05-15 1951-05-15 Process for the preparation of a monoazo dye. CH299201A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH299201T 1951-05-15
CH295676T 1951-05-15

Publications (1)

Publication Number Publication Date
CH299201A true CH299201A (en) 1954-05-31

Family

ID=25733629

Family Applications (1)

Application Number Title Priority Date Filing Date
CH299201D CH299201A (en) 1951-05-15 1951-05-15 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH299201A (en)

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