CH170917A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH170917A
CH170917A CH170917DA CH170917A CH 170917 A CH170917 A CH 170917A CH 170917D A CH170917D A CH 170917DA CH 170917 A CH170917 A CH 170917A
Authority
CH
Switzerland
Prior art keywords
preparation
aminobenzene
azo dye
dye
parts
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 CH170917A publication Critical patent/CH170917A/en

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Description

  

  Verfahren zur     1)arstellunb    eines     Azofarbstofes.       Nach dem im Hauptpatent beschriebenen  Verfahren erhält man einen blauen Acetat  seidenfarbstoff, wenn man     diazotiertes    G  Brom - 2 . 4 -     dinitro    - 1-     aminobenzol    mit     1-          Aminonaphthalin    kuppelt.  



  Wie nun weiter gefunden wurde, er  hält man einen Farbstoff mit ganz ähnlichen  Eigenschaften, wenn man 6 - Chlor - 2. 4 -     di-          nitro    - 1 -     aminobenzol        diazotiert        ufd    mit       Di    -     (oxyäthyl)    -     aminobenzol    kuppelt.  



  <I>Beispiel:</I>  Man bereitet eine     Diazolösung,    indem  man bei 50 bis 60   22 Teile 6; - Chlor - 2. 4       dinitro    - 1 -     aminobenzol    in durch Eintragen  von 6,9 Teilen     Natriumnitrit    in 120 Teile       konz.    Schwefelsäure bereitete     Nitrosyl-          schwefelsäure    einrührt und die Masse hier  auf durch Aufgiessen auf Eis stark verdünnt.

    Die filtrierte schwefelsaure     Diazolösung        läuft       in eine kalte Lösung von 18,1 Teilen     Di-          (oxyäthyl)-    -     aminobenzol    in 500 Teilen Was  ser und 11 Teilen Salzsäure<B>23'</B>     B6    ein.       Han    stumpft mit so viel     Natriumacetat    ab,  dass die Kupplung im Verlauf von einigen  Stunden beendet ist. Der Farbstoff wird wie  üblich aufgearbeitet. Er färbt     Acetatseide     lichtecht blaurot an.



  Method for 1) preparation of an azo dye. According to the process described in the main patent, a blue acetate silk dye is obtained if diazotized G bromine - 2. 4 - dinitro - 1 - aminobenzene couples with 1 - aminonaphthalene.



  As has now been further found, a dye with very similar properties is obtained if 6 - chloro - 2, 4 - nitro - 1 - aminobenzene is diazotized and coupled with di - (oxyethyl) - aminobenzene.



  <I> Example: </I> A diazo solution is prepared by adding 22 parts 6; to 50 to 60; - Chlorine - 2.4 dinitro - 1 - aminobenzene in by adding 6.9 parts of sodium nitrite in 120 parts of conc. Sulfuric acid, stir in nitrosylsulphuric acid and dilute the mass here by pouring it onto ice.

    The filtered sulfuric acid diazo solution runs into a cold solution of 18.1 parts of di- (oxyethyl) - aminobenzene in 500 parts of water and 11 parts of hydrochloric acid 23 'B6. Han dulls with so much sodium acetate that the coupling is complete within a few hours. The dye is worked up as usual. It stains acetate silk lightfast blue-red.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Aoetat- seide lichtecht in blauroten Tönen anfärben den Farbstoffes, dadurch gekennzeichnet, dass man 6 - Chlor - 2 . 4 - dinitro - 1 - amino- benzol diazotiert und die Diazoverbindung mit Di - (oxyäthyl) - aminobenzol kuppelt. PATENT CLAIM: Process for the production of an acetate silk lightfast in blue-red tones dyeing the dye, characterized in that 6 - chlorine - 2. 4 - dinitro - 1 - aminobenzene is diazotized and the diazo compound is coupled with di - (oxyethyl) - aminobenzene.
CH170917D 1932-07-08 1933-04-27 Process for the preparation of an azo dye. CH170917A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE170917X 1932-07-08
CH168144T 1933-04-27

Publications (1)

Publication Number Publication Date
CH170917A true CH170917A (en) 1934-07-31

Family

ID=25718517

Family Applications (1)

Application Number Title Priority Date Filing Date
CH170917D CH170917A (en) 1932-07-08 1933-04-27 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH170917A (en)

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