CH194664A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH194664A CH194664A CH194664DA CH194664A CH 194664 A CH194664 A CH 194664A CH 194664D A CH194664D A CH 194664DA CH 194664 A CH194664 A CH 194664A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- azo dye
- preparation
- acid
- mol
- Prior art date
Links
Landscapes
- Nitrogen Condensed Heterocyclic Rings (AREA)
Description
Verfahren zur Herstellung eines Azofarbstoffes. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines Azofarb- stoff.:
s, das dadurch gekennzeichnet ist, daB man 1 Mol m-Aminobenzoyldehydrothiotolui- dinsulfonsäure diazotiert und mit 1 Mol 1-(m'-Amino) -phenyl- 5 -pyrazolon-.3@-carban- säure kuppelt.
Der so erhaltene Farbstoff ist identisch mit demjenigen, der gemäss dem Verfahren des Schweiz. Patentes Nr.191737 erhalten wird.
<I>Beispiel:</I> 43,9 g m-Aminobenzoyl,dehydrothiotolui- dinsulfonsäure werden in Wasser unter Zu satz von Natriumcarbonat zu einer neutralen Lösung gelöst, in eine Mischung von 28 g 10- facher n-Salzsäure in etwas Wasser gegeben und bei 40' mit 7 g Natriumnitrit diazotieit. Das Diazotierungsgemisch wird alsdann in einer wä serigen Lösung von 23 Teilen 1-,(m'-Amino)
-phenyl- 5 -pyrazolon- 3 -carbon- säure, die 6 g Natriumcarbonat enthält, ge gossen.
Process for the preparation of an azo dye. The subject of the present patent is a process for the production of an azo dye .:
s, which is characterized in that 1 mole of m-aminobenzoyldehydrothiotoluidinsulfonic acid is diazotized and coupled with 1 mole of 1- (m'-amino) -phenyl-5-pyrazolone-.3@-carbanic acid.
The dye thus obtained is identical to that obtained according to the Swiss procedure. Patent No. 191737 is obtained.
<I> Example: </I> 43.9 g of m-aminobenzoyl, dehydrothiotoluidinsulfonic acid are dissolved in water with the addition of sodium carbonate to form a neutral solution, added to a mixture of 28 g of 10-fold n-hydrochloric acid in a little water and diazotieit at 40 'with 7 g of sodium nitrite. The diazotization mixture is then in an aqueous solution of 23 parts of 1 -, (m'-amino)
-phenyl- 5 -pyrazolon- 3 -carboxylic acid, which contains 6 g of sodium carbonate, poured ge.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE194664X | 1934-06-21 | ||
CH190723T | 1935-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH194664A true CH194664A (en) | 1937-12-15 |
Family
ID=25722041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH194664D CH194664A (en) | 1934-06-21 | 1935-05-29 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH194664A (en) |
-
1935
- 1935-05-29 CH CH194664D patent/CH194664A/en unknown
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