CH170916A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- 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
Links
Landscapes
- Coloring (AREA)
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)
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) |
-
1933
- 1933-04-27 CH CH170916D patent/CH170916A/en unknown
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