CH211802A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH211802A CH211802A CH211802DA CH211802A CH 211802 A CH211802 A CH 211802A CH 211802D A CH211802D A CH 211802DA CH 211802 A CH211802 A CH 211802A
- Authority
- CH
- Switzerland
- Prior art keywords
- ethyloxyethylaminobenzene
- azo dye
- dye
- preparation
- diazo
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B43/00—Preparation of azo dyes from other azo compounds
- C09B43/18—Preparation of azo dyes from other azo compounds by acylation of hydroxyl group or of mercapto group
- C09B43/20—Preparation of azo dyes from other azo compounds by acylation of hydroxyl group or of mercapto group with monocarboxylic acids, carbamic acid esters or halides, mono- isocyanates or haloformic acid esters
- C09B43/202—Aliphatic, cycloaliphatic, araliphatic carboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 208950. Verfahren zur Herstellung eines Azofarbstofes. Es wurde gefunden, dass man einen neuen wertvollen Azofarbstoff erhält, wenn man Äthyloxyäthylaminobenzol, die Diazoverbin- dung des 4-Nitroaminobenzols und Malein- säureanhydrid derart aufeinander einwirken lässt,
dass der saure Maleinsäureester des Äthyloxyäthylaminobenzols gebildet wird und der Diazorest in 4-Stellung zur tertiären Aminogruppe eintritt.
Der so erhaltene Farbstoff bildet ein dunkles Pulver, das sich in Form eines Al kalisalzes in Wasser mit oranger Farbe löst und Acetatkunstseide aus wässeriger Lösung in rotorangen Tönen färbt.
<I>Beispiel:</I> In die Diazolösung, die man aus 139 Tei len 4-Nitroaminobenzol herstellt, trägt man Q63 Teile des sauren Maleinsäureesters des Äthyloxyäthylaminobenzols, erhalten durch Umsetzung von Äthyloxyäthylaminobenzol mit 1VIaleinsäureanhydrid, der in Form einer wässerigen Lösung seines Ammoniumsalzes vorliegt, ein. Man führt die Kupplung durch längeres Rühren zu Ende und kann auch allenfalls neutralisierende Mittel, wie zum Beispiel Natriumacetat zugeben.
Der Farb stoff wird dann abfiltriert und etwas mit Wasser gewaschen. Man verrührt ihn dann mit Ammoniak auf den Neutralpunkt. In trockenem Zustande bildet der Farbstoff ein dunkles Pulver, das sich in reinem Wasser mit roter Farbe löst und Acetatkunstseide aus wässeriger Lösung, besonders in kurzer Flotte, in rotorangen Tönen färbt.
Additional patent to main patent no. 208950. Process for the production of an azo dye. It has been found that a new valuable azo dye is obtained if ethyloxyethylaminobenzene, the diazo compound of 4-nitroaminobenzene and maleic anhydride are allowed to act on one another in such a way that
that the acidic maleic acid ester of ethyloxyethylaminobenzene is formed and the diazo radical occurs in the 4-position to the tertiary amino group.
The dye obtained in this way forms a dark powder which, in the form of an alkali salt, dissolves in water with an orange color and dyes acetate rayon from aqueous solution in red-orange tones.
<I> Example: </I> In the diazo solution, which is produced from 139 parts of 4-nitroaminobenzene, one carries Q63 parts of the acidic maleic acid ester of ethyloxyethylaminobenzene, obtained by reacting ethyloxyethylaminobenzene with 1VIaleic anhydride, which is in the form of an aqueous solution of its ammonium salt is present, a. The coupling is completed by prolonged stirring and neutralizing agents such as sodium acetate, for example, can also be added.
The dye is then filtered off and washed a little with water. It is then stirred with ammonia to the neutral point. When dry, the dye forms a dark powder which dissolves in pure water with a red color and dyes acetate artificial silk from an aqueous solution, especially in a short liquor, in red-orange tones.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH211802T | 1937-09-18 | ||
CH208950T | 1937-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH211802A true CH211802A (en) | 1940-10-15 |
Family
ID=25724593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH211802D CH211802A (en) | 1937-09-18 | 1937-09-18 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH211802A (en) |
-
1937
- 1937-09-18 CH CH211802D patent/CH211802A/en unknown
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