CH210996A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH210996A CH210996A CH210996DA CH210996A CH 210996 A CH210996 A CH 210996A CH 210996D A CH210996D A CH 210996DA CH 210996 A CH210996 A CH 210996A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- blue
- acid
- amino
- disazo dye
- 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
EMI0001.0006
dadurch gekennzeichnet, dass man den durch Kuppeln von dianotierter 5-Nitro-2-amino-1,
1'- dipheriylsulfori-3'-sulfonsäur-e mit N-Oxyäthyl- 2-amirio-8-oxynaphthaliri-6-sulfonsäure in saurer Lösung und Reduktion des entstan denen Nitrofarbstoffes mit Natriumsulfid er hältlichen Monoazofarbstoff dianotiert, alka lisch mit 2-Methoxy-l-oxybenzol vereinigt und den Disazofarbstoff in alkalischer Lösung mit 4-Methoxybenzolsulfonsäurechlorid in der phenolischen Hydroxylgruppe verestert.
Der neue Farbstoff, ein blaues Pulver, das sich in Wasser und in konzentrierter Schwefel säure grünblau löst, färbt Wolle und Seide in schönen, grünblauen Tönen.
<I>Beispiel:</I> 35,8 Teile 5-Nitro-2-amino-1,1'-diphenyl- sulfon-3'-sulfonsäure werden dianotiert und in saurer Lösung mit 28,1 Teilen N-Oxyäthyl- 2-amino-8-oxynaphthalin-6-sulfonsäure ver einigt. Der gebildete Monoazofarbstoff wird bei<B>500</B> C mit der nötigen Menge Natrium sulfid reduziert und darauf mit 6,5 Teilen Nitrit und 40 Teilern Salzsäure 30 % bei 0 0 diazotiert. Nun gibt man zur Diazoniumver- bindung <B>12,5</B> Teile 2-Methoxy-l-oxyberizol und darauf rasch 40 Teile Soda.
Nach beendeter Kupplung erwärmt man auf 75 0 C und verestert mit 50 Teilen 4-bl:ethoxyberizolsulfonsäure- chlorid. Durch Aussalzen, Filtrieren und Trocknen erhält man ein dunkles Pulver, das sich in Wasser und in konzentrierter Schwefel säure grünblau 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
EMI0001.0006
characterized in that the coupling of dianotated 5-nitro-2-amino-1,
1'- dipheriylsulfori-3'-sulfonic acid with N-Oxyäthyl- 2-amirio-8-oxynaphthaliri-6-sulfonic acid in acidic solution and reduction of the resulting nitro dye with sodium sulfide dianotized monoazo dye, alkali with 2-methoxy Combined l-oxybenzene and esterified the disazo dye in alkaline solution with 4-methoxybenzenesulfonic acid chloride in the phenolic hydroxyl group.
The new dye, a blue powder that dissolves green-blue in water and concentrated sulfuric acid, dyes wool and silk in beautiful green-blue tones.
<I> Example: </I> 35.8 parts of 5-nitro-2-amino-1,1'-diphenylsulfone-3'-sulfonic acid are dianotized and mixed with 28.1 parts of N-oxyethyl-2 in acidic solution -amino-8-oxynaphthalene-6-sulfonic acid united ver. The monoazo dye formed is reduced at <B> 500 </B> C with the necessary amount of sodium sulfide and then diazotized with 6.5 parts of nitrite and 40 parts of hydrochloric acid 30% at 0 °. Now add <B> 12.5 </B> parts of 2-methoxy-l-oxyberizole to the diazonium compound and then quickly 40 parts of soda.
After the coupling has ended, the mixture is heated to 75 ° C. and esterified with 50 parts of 4-B1: ethoxyberizolsulfonic acid chloride. Salting out, filtering and drying gives a dark powder which dissolves green-blue in water and in concentrated sulfuric acid.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH210996T | 1938-07-19 | ||
CH199787T | 1938-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH210996A true CH210996A (en) | 1940-08-15 |
Family
ID=25723373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH210996D CH210996A (en) | 1938-07-19 | 1938-07-19 | Process for the preparation of a disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH210996A (en) |
-
1938
- 1938-07-19 CH CH210996D patent/CH210996A/en unknown
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