CH177842A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH177842A
CH177842A CH177842DA CH177842A CH 177842 A CH177842 A CH 177842A CH 177842D A CH177842D A CH 177842DA CH 177842 A CH177842 A CH 177842A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
parts
oxyethyl
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 CH177842A publication Critical patent/CH177842A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  verfahren zur Darstellung eines     Azofarbstofi'es.       Gemäss dem im Hauptpatent beschriebenen  Verfahren erhält man einen für die Acetat  seidenfärberei brauchbaren Farbstoff, wenn  man die aus     4-Nitro-l-aminobenzol    bereitete       Diazoverbindung    mit     3-Chlor-1-(oxyäthyl-p.    r  dioxypropyl)-aminoberizol kuppelt.  



  Wie nun weiter gefunden wurde, erhält  man einen ebenfalls für die     Acetatseidenfär-          berei    sehr gut brauchbaren Farbstoff, wenn  man     2.6-Dichlor-l-amino-4-nitrobenzol    diano  tiert und mit     Oxyäthyl-r-rnethoxy-ss-oxypropyl-          aminobenzol    kuppelt.  



       Beispiel:     Man bereitet eine     Diazolösung,    indem man  bei 25-30   20,7 Teile, 2,6     Dichlor-l-amirro-          4-nitrobenzol    in durch Eintragen von 7 Teilen       Natriumnitrit    in 130 Teile konzentrierte Schwe  felsäure bereitete     Nitrosylschwefelsäure    ein  rührt und die Masse hierauf durch Aufgiessen  auf Eis stark verdünnt. Die filtrierte schwefel-    saure     Diazolösung    läuft in eine kalte Lösung  von 22,5 Teilen     Oxyäthyl-i--metboxy-p-oxy-          propyl-aminober)zol    in 800 Teilen Wasser und  13 Teilen Salzsäure 23       B6    ein.

   Man stumpft  hierauf mit soviel Natronlauge ab, bis die  Kupplung beendet ist. Der Farbstoff färbt       Acetatseide    in klaren gelbbraunen Tönen von  sehr guter Lichtechtheit.



  method for the representation of an azo dye. According to the process described in the main patent, a dye that can be used for acetate silk dyeing is obtained if the diazo compound prepared from 4-nitro-1-aminobenzene is coupled with 3-chloro-1- (oxyethyl-p. R dioxypropyl) -aminoberizole.



  As has now been found, a dye which is also very useful for acetate silk dyeing is obtained if 2,6-dichloro-1-amino-4-nitrobenzene is dianoed and coupled with oxyethyl-r-methoxy-ß-oxypropyl-aminobenzene.



       Example: A diazo solution is prepared by stirring in nitrosylsulfuric acid prepared by adding 7 parts of sodium nitrite to 130 parts of concentrated sulfuric acid at 25-30 20.7 parts, 2.6 dichloro-l-amirro-4-nitrobenzene, and stirring the mass then strongly diluted by pouring on ice. The filtered sulfuric acid diazo solution runs into a cold solution of 22.5 parts of oxyethyl-i-metboxy-p-oxypropylaminober) zene in 800 parts of water and 13 parts of hydrochloric acid 23 B6.

   It is then blunted with enough sodium hydroxide solution until the coupling has ended. The dye dyes acetate silk in clear yellow-brown shades of very good lightfastness.

Claims (1)

PATENTANSPRUCH Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 2.6-Dichlor-l-amino-4-nitrobenzol dianotiert und die Diazoverbindung mit Oxyäthyl-r- methoxy-p-oxypropyl-aminobenzol kuppelt. Der Farbstoff färbt Acetatseide in klaren gelb braunen Tönen an. PATENT CLAIM Process for the preparation of an azo dye, characterized in that 2,6-dichloro-1-amino-4-nitrobenzene is dianotized and the diazo compound is coupled with oxyethyl-r-methoxy-p-oxypropyl-aminobenzene. The dye stains acetate silk in clear yellow-brown tones.
CH177842D 1933-04-15 1934-02-07 Process for the preparation of an azo dye. CH177842A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE177842X 1933-04-15
CH175032T 1934-02-07

Publications (1)

Publication Number Publication Date
CH177842A true CH177842A (en) 1935-06-15

Family

ID=25719605

Family Applications (1)

Application Number Title Priority Date Filing Date
CH177842D CH177842A (en) 1933-04-15 1934-02-07 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH177842A (en)

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