CH107997A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH107997A CH107997A CH107997DA CH107997A CH 107997 A CH107997 A CH 107997A CH 107997D A CH107997D A CH 107997DA CH 107997 A CH107997 A CH 107997A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- azo dye
- toluidide
- dye
- amido
- Prior art date
Links
- 239000000987 azo dye Substances 0.000 title claims description 3
- 238000000034 method Methods 0.000 title claims description 3
- 238000002360 preparation method Methods 0.000 title claims description 3
- RGCKGOZRHPZPFP-UHFFFAOYSA-N alizarin Chemical compound C1=CC=C2C(=O)C3=C(O)C(O)=CC=C3C(=O)C2=C1 RGCKGOZRHPZPFP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000975 dye Substances 0.000 claims description 4
- 150000008049 diazo compounds Chemical class 0.000 claims description 3
- OCISOSJGBCQHHN-UHFFFAOYSA-N 3-hydroxynaphthalene-1-carboxylic acid Chemical compound C1=CC=C2C(C(=O)O)=CC(O)=CC2=C1 OCISOSJGBCQHHN-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000007900 aqueous suspension Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Azofarbstoffes. Es wurde gefunden, dass man zu einem Farbstoff, welcher Färbungen von ausgezeich rreten Echtheitseigenschaften gibt; gelangt, wenn man die.Diazoverbindung von m-Amido- p-methoxybenzoesäure-o-toluidid mit 2# 3-Oxy- naphtoesäure-5-chlor-2-toluidid (CHa : NH2 : Cl = 1:2:5) kuppelt.
Man erhält hierbei einen Farbstoff von ausgezeichnet klarer, blaustichig roter Nuance, der die wichtige Eigenschaft besitzt, dass er zur Erzeugung von echten alizarinrosa Tönen dienen kann.
<I>Beispiel:</I> Die aus 25,6 kg m-Amido-p-methoxy- benzoesäure-o-toluidid in üblicher Weise dar gestellte Diazoverbindung lässt man unter Rühren in eine wässrige Suspension von 31 kg 2 # 3-Oxynaphtoesänre-5-eblor-2-toluidid (CH3 NH2: C1 = 1:2:5), bereitet durch Auflösen desselben in Natronlauge und Wiederausfällen mit verdünnter Essigsäure, einlaufen. Der Farbstoff scheidet sich als roter Niederschlag aus. Darauf wird filtriert, gewaschen und ge trocknet.
Process for the preparation of an azo dye. It has been found that a dye which gives dyeings with excellent fastness properties; obtained when the diazo compound of m-amido-p-methoxybenzoic acid-o-toluidide with 2 # 3-oxynaphthoic acid-5-chloro-2-toluidide (CHa: NH2: Cl = 1: 2: 5) is coupled.
This gives a dye with an extremely clear, bluish red shade which has the important property that it can be used to produce true alizarin pink tones.
<I> Example: </I> The diazo compound prepared in the usual way from 25.6 kg of m-amido-p-methoxybenzoic acid-o-toluidide is left with stirring in an aqueous suspension of 31 kg of 2 # 3-oxynaphthoic acid -5-eblor-2-toluidide (CH3 NH2: C1 = 1: 2: 5), prepared by dissolving it in sodium hydroxide solution and reprecipitating it with dilute acetic acid, run in. The dye separates out as a red precipitate. It is then filtered, washed and dried.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE107997X | 1923-01-18 | ||
| CH107620T | 1924-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH107997A true CH107997A (en) | 1924-12-01 |
Family
ID=25707236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH107997D CH107997A (en) | 1923-01-18 | 1924-01-15 | Process for the preparation of an azo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH107997A (en) |
-
1924
- 1924-01-15 CH CH107997D patent/CH107997A/en unknown
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