CH170916A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH170916A
CH170916A CH170916DA CH170916A CH 170916 A CH170916 A CH 170916A CH 170916D A CH170916D A CH 170916DA CH 170916 A CH170916 A CH 170916A
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 CH170916A publication Critical patent/CH170916A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Nach dem im Hauptpatent beschriebenen  Verfahren erhält man einen blauen Acetat  seidenfarbstoff, wenn man     diazotiertes        6-          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 - Brom - 2. 4 -     di-          nitro    - 1 -     aminobenzol        diazotiert    und     mit          Di    -     (ogyäthyl)    -     aminobenzol    kuppelt.

      <I>Beispiel:</I>       plan    bereitet eine     Diazolösung,    indem  man bei 50 bis 60   29 Teile 6 - Brom - 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-          (ogyäthyl)-    -     aminobenzol    in 500 Teilen Was  ser und 11 Teilen Salzsäure<B>23'</B>     B6    ein.

    Man 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.



  Process for the preparation of an azo dye. According to the process described in the main patent, a blue acetate silk dye is obtained if diazotized 6-bromine-2, 4-dinitro-1-aminobenzene is coupled with 1-aminonaphthalene.



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

      <I> Example: </I> plan prepares a diazo solution by adding 29 parts of 6 - bromine - 2, 4 - dinitro - 1 - aminobenzene to 50 to 60 by entering 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- (ogyäthyl) - - aminobenzene in 500 parts of water and 11 parts of hydrochloric acid 23 'B6.

    It is blunted with enough 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 Acetat seide lichtecht in blauroten Tönen anfärben den Farbstoffes, dadurch gekennzeichnet, dass man 6 - Brom - 2. 4 - dinitro - 1 - amino- benzol diazotiert und die Diazoverbindung mit Di - (ogyäthyl) - aminobenzol kuppelt. PATENT CLAIM: Process for the preparation of an acetate, silk lightfast, coloring the dye in blue-red tones, characterized in that 6 - bromine - 2.4 - dinitro - 1 - aminobenzene is diazotized and the diazo compound is coupled with di - (ogyethyl) - aminobenzene.
CH170916D 1932-07-08 1933-04-27 Process for the preparation of an azo dye. CH170916A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE170916X 1932-07-08
CH168144T 1933-04-27

Publications (1)

Publication Number Publication Date
CH170916A true CH170916A (en) 1934-07-31

Family

ID=25718516

Family Applications (1)

Application Number Title Priority Date Filing Date
CH170916D CH170916A (en) 1932-07-08 1933-04-27 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH170916A (en)

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