CH187916A - Process for the preparation of an insoluble azo dye. - Google Patents

Process for the preparation of an insoluble azo dye.

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Publication number
CH187916A
CH187916A CH187916DA CH187916A CH 187916 A CH187916 A CH 187916A CH 187916D A CH187916D A CH 187916DA CH 187916 A CH187916 A CH 187916A
Authority
CH
Switzerland
Prior art keywords
insoluble azo
azo dye
preparation
parts
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH187916A publication Critical patent/CH187916A/en

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Description

  

  Verfahren zur Herstellung eines unlöslichen     Azofarbstoffes.       Gemäss dem im Hauptpatent beschriebe  nen Verfahren erhält man     einen        Acetatseide     in blaustichig roten Tönen anfärbenden un  löslichen     Azofarbstoff,    wenn man     4-Nitro-          1-aminobenzol        diazotiert    und die     Diazover-          bindung    mit     1-Butyl-3-oxy-7-chlortetrahydro-          chinolin    kuppelt.  



  Wie nun     weiter    gefunden wurde, erhält  man einen     Farbstoff    von ähnlichen Eigen  schaften, wenn man     2,6-Dichlor-l-amino-          4-nitrobenzol        diazotiert    und die     Diazover-          bindung    mit     1-Benzyl-3-oxy-7-methyl-tetra-          hydrochinolin    kuppelt.  



  <I>Beispiel:</I>  Man bereitet eine     Diazolösung,    indem  man bei 25 bis<B>30',</B> 20,7 Teile     2,6-Dichlor-          1-amino-4-nitrobenzol    in durch Eintragen  von 7 Teilen     Natriumnitrit    in 130 Teilen       konzentrierter    Schwefelsäure bereitete     Nitro-          sylsch-%vefelsäure    einrührt und die Masse  hierauf durch Eingiessen auf Eis stark ver-    dünnt.

   Die filtrierte schwefelsaure     Diazo-          lösung        läuft        in    eine kalte Lösung von 25,3  Teilen     1-Benzyl-3-oxy-7-methyl-tetrahydro-          chinolin        in   <B>800</B> Teilen Wasser und 20 Tei  len Salzsäure 23       B6    ein. Man stumpft hier  auf     mit    so viel Natronlauge ab,     bis    die  Kupplung beendet ist. Der Farbstoff färbt       Acetatseide    blaustichig braun an.



  Process for the preparation of an insoluble azo dye. According to the process described in the main patent, an insoluble azo dye which stains acetate silk in bluish red shades is obtained if 4-nitro-1-aminobenzene is diazotized and the diazo compound is coupled with 1-butyl-3-oxy-7-chlorotetrahydroquinoline .



  As has now been found further, a dye with similar properties is obtained if 2,6-dichloro-1-amino-4-nitrobenzene is diazotized and the diazo compound is diazotized with 1-benzyl-3-oxy-7-methyl-tetra - hydroquinoline couples.



  <I> Example: </I> A diazo solution is prepared by adding, at 25 to <B> 30 ', </B> 20.7 parts of 2,6-dichloro-1-amino-4-nitrobenzene in 7 parts of sodium nitrite in 130 parts of concentrated sulfuric acid are stirred in nitrosylsyl sulphate and the mass is then strongly diluted by pouring onto ice.

   The filtered sulfuric acid diazo solution runs into a cold solution of 25.3 parts of 1-benzyl-3-oxy-7-methyl-tetrahydroquinoline in 800 parts of water and 20 parts of hydrochloric acid 23 B6 . You blunt here with enough caustic soda until the coupling has ended. The dye gives the acetate silk a bluish brown tint.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines unlös lichen Azofarbstoffes, ,dadurch gekennzeich net, dass, man 2, 6-Dichlor-l-amino-4-nitro- benzol diazotiert und die Diazoverbindung mit 1-Benzyl-3-oxy-7-methyl-tetrahy droehi- nolin kuppelt. Der erhaltene Farbstoff färbt Acetatseide in blaustichig braunen Tönen an. PATENT CLAIM: Process for the production of an insoluble azo dye, characterized in that, 2, 6-dichloro-1-amino-4-nitrobenzene is diazotized and the diazo compound is treated with 1-benzyl-3-oxy-7-methyl- tetrahy droehinolin engages. The dye obtained stains acetate silk in bluish brown shades.
CH187916D 1934-08-11 1935-05-07 Process for the preparation of an insoluble azo dye. CH187916A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187916X 1934-08-11
CH185944T 1935-05-07

Publications (1)

Publication Number Publication Date
CH187916A true CH187916A (en) 1936-11-30

Family

ID=25721277

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187916D CH187916A (en) 1934-08-11 1935-05-07 Process for the preparation of an insoluble azo dye.

Country Status (1)

Country Link
CH (1) CH187916A (en)

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