CH174268A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH174268A CH174268A CH174268DA CH174268A CH 174268 A CH174268 A CH 174268A CH 174268D A CH174268D A CH 174268DA CH 174268 A CH174268 A CH 174268A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- parts
- sulfonic acid
- nitro
- preparation
- 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
- C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
- C09B33/18—Trisazo or higher polyazo dyes
- C09B33/24—Trisazo dyes of the type
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 170089. Verfahren zur Herstellung eines Azofarbstoffes. Gemäss dem im Hauptpatent beschriebenen Verfahren erhält man einen wertvollen Azo- farbstoff, wenn man 1 Mol 1-Amino-8-oxy- naphtlialin-3.6-disulfosäure dianotiert,
die Diazoverbindung mit 1 Mol 1.3-Dioxybenzol in alkalischer Lösung kuppelt und den so erhaltenen Morioazofai-bstoff mit 2 Mol diano tiertem 2 - Niti-o - 1. 4 - d iamirioberizol weiter kuppelt. .
Wie nun weiter gefunden wurde, erhält man einen Leder dunkelrotbraun anfärbenden Farbstoff, wenn man den aus dianotierter 1-Amino-8-oxynaphthaliir-4-sulfosäure durch Kuppeln mit 1.3-Dioxyberizol erhältliehen Monoazofarbstoff mit 1 Mol dianotiertem 2- Niti-o-1.4-diaminobenzol und 1 Mol dianotier ter 4-Nitro-4'-amiriodiphenylamin-2-sulfosäure weiter kuppelt.
<I>Beispiel:</I> 30,2 Teile des Monoazofarbstoffes aus di anotierter 1-Amino-8-oxynaphthalin-4-sulfo- säure und Resorcin werden in 1000 Teilen Wasser unter Zusatz von 8 Teilen Natrium hydroxyd gelöst. 19 Teile salzsaures 2-Nitro- I:4-diamiriobenzol werden in der üblichen Weise dianotiert. Die Lösung der Diazover- bindung läuft bei 10 zu der des Monoazo- farbstoffes gleichzeitig mit 6 Teilen Natrium hydroxyd, gelöst in 100 Teilen Wasser.
Zu dem Reaktionsprodukt lässt man nach etwa 1 Stunde die aus 30,9 Teilen 4-Nitro-4'-amino- diphenylamin-2-sulfosäure erhältliche Diazo- verbindung gleichzeitig mit 6 Teilen Natrium hydroxyd, in 100 Teilen Wasser gelöst, zu laufen. Der Farbstoff wird in der üblichen Weise aufgearbeitet. Er färbt Leder dunkel rotbraun.
Additional patent to main patent no. 170089. Process for the production of an azo dye. According to the process described in the main patent, a valuable azo dye is obtained if 1 mole of 1-amino-8-oxynaphthalene-3,6-disulfonic acid is dianotated,
the diazo compound is coupled with 1 mol of 1,3-dioxybenzene in alkaline solution and the morioazofa-bstoff thus obtained is further coupled with 2 mol of diano-tated 2-niti-o-1.4-diamirioberizole. .
As has now been found further, a leather dye that stains dark red-brown is obtained if the monoazo dye obtained from dianotated 1-amino-8-oxynaphthalene-4-sulfonic acid by coupling with 1,3-dioxyberizole with 1 mol of dianotated 2-Niti-o-1.4- diaminobenzene and 1 mole of dianotier 4-nitro-4'-amiriodiphenylamine-2-sulfonic acid are further coupled.
<I> Example: </I> 30.2 parts of the monoazo dye from di-anotized 1-amino-8-oxynaphthalene-4-sulfonic acid and resorcinol are dissolved in 1000 parts of water with the addition of 8 parts of sodium hydroxide. 19 parts of hydrochloric acid 2-nitro-I: 4-diamiriobenzene are dianotized in the usual way. The solution of the diazo compound runs at 10 to that of the monoazo dye simultaneously with 6 parts of sodium hydroxide dissolved in 100 parts of water.
After about 1 hour, the diazo compound obtainable from 30.9 parts of 4-nitro-4'-aminodiphenylamine-2-sulfonic acid is allowed to run into the reaction product at the same time as 6 parts of sodium hydroxide dissolved in 100 parts of water. The dye is worked up in the usual way. He dyes leather dark red-brown.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH170089T | 1934-04-09 | ||
CH174268T | 1934-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH174268A true CH174268A (en) | 1934-12-31 |
Family
ID=25718849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH174268D CH174268A (en) | 1934-04-09 | 1934-04-09 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH174268A (en) |
-
1934
- 1934-04-09 CH CH174268D patent/CH174268A/en unknown
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