CH226018A - Process for the production of a new azo dye. - Google Patents
Process for the production of a new azo dye.Info
- Publication number
- CH226018A CH226018A CH226018DA CH226018A CH 226018 A CH226018 A CH 226018A CH 226018D A CH226018D A CH 226018DA CH 226018 A CH226018 A CH 226018A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- orange
- dichloro
- dye
- production
- 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)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen Azofarbstoifes. Es wurde gefunden, dass man einen neuen Azofarbstoff erhält, wenn man N-Diogy- äthylaminobenzol in beliebiger Reihenfolge derart mit wasserfreier Ogalsäure und der Diazoverbindung des 2,6 - Dichlor - 4 - nitro- aminobenzols behandelt, dass der Diazorest des 2,
6-Dichlor-4-nitroaminobenzols in die 4- Stellung zur N-Diogyäthylaminogruppe ein tritt und die Ogalsäure mit einer Hydrogyl- gruppe des N-Diogyäthylaminobenzols einen sauren Ester bildet.
Der neue Farbstoff bildet ein dunkles Pulver, das sich in Wasser mit orangebrauner Farbe löst und das aus wässriger Lösung Acetatkunstseide in orangebraunen Tönen färbt.
<I>Beispiel:</I> 181 Teile N - (Diogäthylamino) - Benzol werden in 1000 Teilen Wasser mit 100 Teilen Salzsäure gelöst und in Gegenwart von Eis in üblicher Weise mit der in Nitrosylschwe- felsäure hergestellten Diazoverbindung von 2,6-Dichlor-4-nitranilin gekuppelt.
Der nach dem Neutralisieren abgeschiedene und gut ge trocknete Farbstoff ist in Wasser unlöslich, dagegen löslich in organischen Lösungsmit teln. 899 Teile des so erhaltenen Farbstoffes werden in 2000 Teilen siedendem Toluol mit 90 Teilen wasserfreier Ogalsäure unter gutem Rühren 1 bis 2 Stunden derart verestert,
dass das durch die Veresterung frei werdende und mit Toluol wegsiedende Wasser aufgefangen und das abdestillierte Toluol dem Reaktions- prozess wieder zugeführt wird. Nach Be endigung der Umsetzung wird das Toluol ab destilliert, der veresterte Farbstoff mit Was ser zu einer Suspension verrieben und mit Ammoniak neutralisiert. Nach allfälligem Zusatz von Natriumchlorid zwecks Verbes serung der Filtrierbarkeit wird der Farbstoff abgenutscht und getrocknet.
Er löst sich in warmem Wasser und färbt Acetatkunstseide aus neutralem Bade in Gegenwart von Na triumsulfat in orangebraunen Tönen.
Process for the production of a new azo dye. It has been found that a new azo dye is obtained if N-diogyethylaminobenzene is treated in any order with anhydrous ogalic acid and the diazo compound of 2,6 - dichloro - 4 - nitro aminobenzene that the diazo radical of 2,
6-dichloro-4-nitroaminobenzene enters the 4-position to the N-diogyethylamino group and the ogalic acid forms an acidic ester with a hydrogyl group of the N-diogyäthylaminobenzene.
The new dye forms a dark powder that dissolves in water with an orange-brown color and which, from an aqueous solution, dyes acetate artificial silk in orange-brown tones.
<I> Example: </I> 181 parts of N - (diethylamino) - benzene are dissolved in 1000 parts of water with 100 parts of hydrochloric acid and, in the presence of ice, in the usual manner with the diazo compound of 2,6-dichloro prepared in nitrosylsulfuric acid -4-nitroaniline coupled.
The dyestuff, which separated out after neutralization and dried well, is insoluble in water, but soluble in organic solvents. 899 parts of the dye thus obtained are esterified in 2000 parts of boiling toluene with 90 parts of anhydrous ogalic acid for 1 to 2 hours with thorough stirring in such a way that
that the water released by the esterification and boiling away with toluene is collected and the toluene distilled off is fed back into the reaction process. After completion of the reaction, the toluene is distilled off, the esterified dye is triturated with water to form a suspension and neutralized with ammonia. After any addition of sodium chloride to improve the filterability, the dye is suction filtered and dried.
It dissolves in warm water and dyes acetate silk from neutral bath in the presence of sodium sulfate in orange-brown tones.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH226018T | 1942-01-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH226018A true CH226018A (en) | 1943-03-15 |
Family
ID=4454333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH226018D CH226018A (en) | 1942-01-26 | 1942-01-26 | Process for the production of a new azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH226018A (en) |
-
1942
- 1942-01-26 CH CH226018D patent/CH226018A/en unknown
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