CH208950A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH208950A CH208950A CH208950DA CH208950A CH 208950 A CH208950 A CH 208950A CH 208950D A CH208950D A CH 208950DA CH 208950 A CH208950 A CH 208950A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- dye
- preparation
- orange
- aqueous solution
- 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
- C09B43/22—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 having the carboxylic group directly attached to an aromatic carbocyclic ring
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Azofarbstoffes. Es wurde gefunden, dass man einen neuen, wertvollen Azofarbstoff erhält, wenn man Äthyloxyäthylarnirroberrzol, die Diazoverbin- dung des 4-Nitroamirroberrzols und Phthal- säureanhydrid derart aufeinander einwirken lässt, dass der saure Plrthalsäureester des Ätlryloxyäthylaminoberrzols 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 Alkali salzes 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-Nitr-oaminobenzol herstellt, trägt rnan 313 Teile des sauren Phthalsäureesters des Ätlryloxyäthylaminobenzols, erhalten durch Umsetzung von Phthalsäurearrhydrid mit Äthyloxyäthylaminobenzol,
der in Form einer wässerigen Lösung eines Arnmoniumsalzes vorliegt, ein. Man führt die Kupplung durch längeres Rühren zu Ende und kann auch allenfalls neutralisierende Mittel, wie z. B. Natriumacetat, zugeben. Der Farbstoff wird dann abfiltriert und etwas mit Wasser ge waschen. Man verrührt ihn dann mit einer Natriumchloridlösung und stellt mit Natrium- carbonat oder mit Ammoniak auf den Neutral punkt.
In trockenem Zustande bildet der Farbstoff ein dunkles Pulver, das sich in reinem Wasser mit roter Farbe löst und Acetatkunstseide aus wässeriger Lösung, be sonders in kurzer Flotte, in rotorangen Tönen färbt.
Process for the preparation of an azo dye. It has been found that a new, valuable azo dye is obtained if ethyloxyäthylarnirroberrzol, the diazo compound of 4-Nitroamirroberrzols and phthalic anhydride are allowed to act on each other in such a way that the acidic acid ester of Ätlryloxyäthylaminoberrzol is formed in the 4-Diazorest tertiary amino group enters.
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 artificial silk from an aqueous solution in red-orange tones. <I> Example: </I> In the diazo solution, which is produced from 139 parts of 4-nitr-oaminobenzene, 313 parts of the acidic phthalic acid ester of ethyloxyethylaminobenzene, obtained by reacting phthalic anhydride with ethyloxyethylaminobenzene, are added,
which is in the form of an aqueous solution of an ammonium salt. The coupling is completed by prolonged stirring and, if necessary, neutralizing agents, such as. B. sodium acetate, add. The dye is then filtered off and washed a little with water. It is then stirred with a sodium chloride solution and set to neutral with sodium carbonate or ammonia.
When dry, the dye forms a dark powder that dissolves in pure water with a red color and dyes acetate artificial silk from aqueous solution, especially in a short liquor, in red-orange tones.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH208950T | 1937-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH208950A true CH208950A (en) | 1940-03-15 |
Family
ID=4446304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH208950D CH208950A (en) | 1937-09-18 | 1937-09-18 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH208950A (en) |
-
1937
- 1937-09-18 CH CH208950D patent/CH208950A/en unknown
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