CH211805A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH211805A CH211805A CH211805DA CH211805A CH 211805 A CH211805 A CH 211805A CH 211805D A CH211805D A CH 211805DA CH 211805 A CH211805 A CH 211805A
- 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
- C09B43/22—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)
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 1-Amino-2-chlor-4-nitrobenzols und Phthalsäureanhydrid derart aufeinander ein wirken lässt,
dass der saure Phthalsäureester des Athyloxyäthylaminobenzols gebildet wird und der Diazorest in 4-Stellung zur tertiären Aminogruppe eintritt.
Der so erhaltene Farbstoff bildet ein dunkles Pul-er, das sich in Form eines Al kalisalzes in Wasser mit roter Farbe löst und Acetatkunstseide aus wässeriger Lösung in roten Tönen färbt.
<I>Beispiel:</I> In die Diazolösung, die man aus 172,5 Teilen 1-Amino-2-chlor-4-nitrobenzol her stellt, trägt man 313 Teile des sauren Phthal- säureesters des Äthyloxyäthylaminobenzols, erhalten durch Umsetzung von Phthalsäure- an.hydrid mit Äthyloxyäthylaminobenzol, der in Form einer wässerigen Lösung eines Am moniumsalzes 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 gewaschen. Man verrührt ihn dann mit einer Natriumehloridlösung und stellt mit Natriumearbonat oder mit Am moniak auf den Neutralpunkt.
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 1-amino-2-chloro-4-nitrobenzene and phthalic anhydride, act on one another in such a way that
that the acidic phthalic acid ester of Athyloxyäthylaminobenzols is formed and the diazo radical occurs in the 4-position to the tertiary amino group.
The dye thus obtained forms a dark powder, which dissolves in the form of an alkali salt in water with a red color and dyes acetate rayon from aqueous solution in red tones.
<I> Example: </I> In the diazo solution, which is prepared from 172.5 parts of 1-amino-2-chloro-4-nitrobenzene, 313 parts of the acidic phthalic acid ester of ethyloxyethylaminobenzene, obtained by reacting Phthalic an.hydride with ethyloxyethylaminobenzene, 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 mixed with a sodium chloride solution and set to neutral with sodium carbonate or ammonia.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH211805T | 1937-09-18 | ||
CH208950T | 1937-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH211805A true CH211805A (en) | 1940-10-15 |
Family
ID=25724596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH211805D CH211805A (en) | 1937-09-18 | 1937-09-18 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH211805A (en) |
-
1937
- 1937-09-18 CH CH211805D patent/CH211805A/en unknown
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