CH210994A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH210994A CH210994A CH210994DA CH210994A CH 210994 A CH210994 A CH 210994A CH 210994D A CH210994D A CH 210994DA CH 210994 A CH210994 A CH 210994A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- blue
- diazotized
- acid
- nitro
- 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
- C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B35/02—Disazo dyes
- C09B35/039—Disazo dyes characterised by the tetrazo component
- C09B35/04—Disazo dyes characterised by the tetrazo component the tetrazo component being a benzene derivative
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 199787. Verfahren zur Herstellung eines Disazofarbstoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Disazo- farbstoffes der Formel
EMI0001.0005
dadurch gekennzeichnet, dass man den durch Kuppeln von diazotierter 5-Nitro-2-amiiio-1,
1'- diphenylsulfon-3'-sulfonsäure mit 2-Methyl- amino-8-ogynaphthalin-6-sulfonsäure in saurer Lösung und Reduktion des entstandenen Nitrofarbstoffes mit Natriumsulfid erhältlichen Monoazofarbstoff diazotiert, alkalisch mit Phenol vereinigt und den Disazofarbstoff in alkalischer Lösung mit p-Toluolsulfonsäure- chlorid in der phenolischen Hydrogylgruppe verestert.
Der neue Farbstoff, ein blaues Pulver, das sich in heissem Wasser grünblau und in konzentrierter Schwefelsäure blau löst, färbt Wolle und Seide in schönen lichtechten, blaugrünen Tönen.
<I>Beispiel:</I> 35,8 Teile 5-Nitro-2-amino-1,1'-diphenyl- sulfon.3'-sulfonsäure werden diazotiert und in schwach saurer Lösung mit 25,3 Teilen 2 Methyl-amino-8-ogynaphthalin - 6 - sulfonsäure vereinigt.
Nach beendigter Farbstoffbildung stellt man die Lösung mit Soda neutral und reduziert die Nitrogruppe des gebildeten Alonoazofarbstoffes bei<B>55'</B> C mit 11,7 Teilen Natriumsulfid 100 o/oig. Der Amirionronoazo- farbstoff wird hierauf mit 6,5 Teilen Nitrit und 40 Teilen Salzsäure 30 /o bei 0 o diazo- tiert. Nun gibt man zur Diazoniumverbindung eine sodaalkalische Lösung von 9,5 Teilen Phenol.
Nach beendeter Kupplung erwärmt man auf<B>750</B> C, versetzt mit überschüssiger Soda und verestert mit 40 Teilen p-Toluol- sulfonsäurechlorid. Durch Aussalzen, Fil trieren und Trocknen erhält man ein blaues Pulver, das sich in heissem Wasser grünblau und in konzentrierter Schwefelsäure blau löst.
Additional patent to main patent no. 199787. Process for the production of a disazo dye. The present patent relates to a process for the preparation of a disazo dye of the formula
EMI0001.0005
characterized in that the by coupling of diazotized 5-nitro-2-amiiio-1,
1'-diphenylsulfone-3'-sulfonic acid with 2-methyl-amino-8-ogynaphthalene-6-sulfonic acid in acidic solution and reduction of the resulting nitro dye with sodium sulfide, monoazo dye, alkaline combined with phenol and the disazo dye in alkaline solution with p- Toluenesulfonic acid chloride esterified in the phenolic hydroyl group.
The new dye, a blue powder that dissolves green-blue in hot water and blue in concentrated sulfuric acid, dyes wool and silk in beautiful lightfast, blue-green tones.
<I> Example: </I> 35.8 parts of 5-nitro-2-amino-1,1'-diphenylsulfone. 3'-sulfonic acid are diazotized and in a weakly acidic solution with 25.3 parts of 2-methylamino -8-ogynaphthalene-6-sulfonic acid combined.
After the dye formation is complete, the solution is made neutral with soda and the nitro group of the alonoazo dye formed is reduced at 55 ° C. with 11.7 parts of 100% sodium sulfide. The amirionronoazo dye is then diazotized with 6.5 parts of nitrite and 40 parts of hydrochloric acid 30 / o at 0 o. A soda-alkaline solution of 9.5 parts of phenol is then added to the diazonium compound.
After coupling has ended, the mixture is heated to 750 C, excess soda is added and 40 parts of p-toluenesulfonic acid chloride are esterified. Salting out, filtering and drying gives a blue powder which dissolves green-blue in hot water and blue in concentrated sulfuric acid.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH199787T | 1938-07-19 | ||
CH210994T | 1938-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH210994A true CH210994A (en) | 1940-08-15 |
Family
ID=25723371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH210994D CH210994A (en) | 1938-07-19 | 1938-07-19 | Process for the preparation of a disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH210994A (en) |
-
1938
- 1938-07-19 CH CH210994D patent/CH210994A/en unknown
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