CH302020A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH302020A
CH302020A CH302020DA CH302020A CH 302020 A CH302020 A CH 302020A CH 302020D A CH302020D A CH 302020DA CH 302020 A CH302020 A CH 302020A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
parts
amino
sulfonic acid
Prior art date
Application number
Other languages
German (de)
Inventor
Farbwerke Hoechst Akt Bruening
Original Assignee
Hoechst Ag
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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH302020A publication Critical patent/CH302020A/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
    • C09B62/00—Reactive dyes, i.e. dyes which form covalent bonds with the substrates or which polymerise with themselves

Landscapes

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

Description

  

      Verfahren    zur     Herstellung    eines     Azofarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines       Azofarbstoffes,    welches dadurch gekennzeich  net ist, dass man die     Diazoniumverbindimg       aus     1-Aminobenzol-2-(fB-ehloräthylsulfon)    mit       2-Amino-8-oxynaphthalin-6-sulfonsäure    ver  einigt.

      <I>Beispiel:</I>    25,6 Gewichtsteile     1-Antinobenzol-2-(ss-          chlor    -     äthylsulfon)    -     hydrochlorid    werden in  250     Volumteilen    5      /o        iger    Salzsäure suspen  diert und wie üblich mit 20     Volumteilen    5n  Natriumnitritlösung     diazotiert.    Die filtrierte       Diazolösung    wird mit einer schwach delta-    sauren Lösung von 26,8 Gewichtsteilen 2  Amino-8-oxynaphthalin-6-sulfonsäure (92,7  prozentig) in 500     Volumteilen    Wasser ver  setzt.

   Nach beendeter Kupplung wird der       Azofarbstoff    der folgenden Formel:  
EMI0001.0020     
    mit     Kaliumchlorid        ausgesalzen,    abgesaugt und  getrocknet.  



  Das so erhaltene Produkt stellt ein dunkel  rotes Pulver dar, das Wolle in blaustichigen  Rottönen von guten     Echtheitseigenschaften     färbt.



      Process for the preparation of an azo dye. The subject of the present additional patent is a process for the production of an azo dye, which is characterized in that the diazonium compound from 1-aminobenzene-2- (fB-ehloräthylsulfon) is combined with 2-amino-8-oxynaphthalene-6-sulfonic acid.

      <I> Example: </I> 25.6 parts by weight of 1-antinobenzene-2- (ss- chloro - ethyl sulfone) - hydrochloride are suspended in 250 parts by volume of 5% hydrochloric acid and diazotized as usual with 20 parts by volume of 5N sodium nitrite solution. The filtered diazo solution is mixed with a slightly delta-acidic solution of 26.8 parts by weight of 2-amino-8-oxynaphthalene-6-sulfonic acid (92.7 percent) in 500 parts by volume of water.

   After the coupling is complete, the azo dye has the following formula:
EMI0001.0020
    salted out with potassium chloride, suction filtered and dried.



  The product thus obtained is a dark red powder which dyes wool in bluish red tones with good fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man die Diazoniumverbindung aus 1-Aminobenzol-2- (/6-chloräthylsulfon) mit 2-Amino-8-oxynaph- t.halin-6-sulfonsäure vereinigt. Das so erhaltene Produkt stellt ein dunkel rotes Pulver dar, das Wolle in blaustichigen Rottönen von guten Echtheitseigenschaften färbt. Claim: Process for the production of an azo dye, characterized in that the diazonium compound from 1-aminobenzene-2- (/ 6-chloroethylsulfone) is combined with 2-amino-8-oxynaph- t.halin-6-sulfonic acid. The product thus obtained is a dark red powder which dyes wool in bluish red tones with good fastness properties.
CH302020D 1950-07-03 1951-06-29 Process for the preparation of an azo dye. CH302020A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE302020X 1950-07-03
CH296340T 1954-01-29

Publications (1)

Publication Number Publication Date
CH302020A true CH302020A (en) 1954-09-30

Family

ID=25733677

Family Applications (1)

Application Number Title Priority Date Filing Date
CH302020D CH302020A (en) 1950-07-03 1951-06-29 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH302020A (en)

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