CH232037A - Process for the preparation of a trisazo dye. - Google Patents
Process for the preparation of a trisazo dye.Info
- Publication number
- CH232037A CH232037A CH232037DA CH232037A CH 232037 A CH232037 A CH 232037A CH 232037D A CH232037D A CH 232037DA CH 232037 A CH232037 A CH 232037A
- Authority
- CH
- Switzerland
- Prior art keywords
- combined
- dye
- sulfonic acid
- preparation
- acidic medium
- 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
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/16—Trisazo dyes
- C09B31/22—Trisazo dyes from a coupling component "D" containing directive hydroxyl and amino groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 227981. Verfahren zur Herstellung eines Trisazofarbstoffes. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung eines Trisazofarb- stoffes, dadurch gekennzeichnet, dass man 1-Diazo-4-oxybenzol-3-carbonsäure in saurem 5 Medium mit 1-Aminonaphthalin-7-sulfonsäure vereinigt,
den erhaltenen und weiterdiazotier- ten Monoazofarbstoff in saurem Medium mit 1-Amino-2.5-dimethoxybenzol vereinigt, den erhaltenen Disazofarbstoff weiterdiazotiert und io die Diazoverbindung in alkalischem Medium mit 1-Acetylamino-6-oxynaphthalin-3-sulfon- säure vereinigt.
Der so erhaltene Trisazofarbstoff -ist ein dunkles Pulver, das sich in konzentrierter t5 Schwefelsäure mit grünschwarzer, in Wasser mit dunkelvioletter Färbe löst und aus der wässrigen Lösung auf Zusatz von Natron lauge als blauer Niederschlag gefällt wird, und färbt zellulosehaltige Fasern in grün 2o grauen Farbtönen, die durch Nachbehandlung mit Metallsalzen sehr gut wasch- und licht echt werden.
Beispiel: Die Diazoverbindung des in saurem Me dium hergestellten Aminoazofarbstoffes aus 15,3 Teilen 1-Amino-4-oxybenzol-3-carbon- säure und 22,3 Teilen - 1-Aminonaphthalin- 7-sulfonsäure wird in Gegenwart von über schüssigem Natriumacetat mit 15,3 Teilen 1-Amino-2,5-dimethoxybenzol vereinigt,
der erhaltene Disazofarbstoff wird weiterdiazotiert und die Diazoverbindung in Gegenwart von überschüssigem Natriumcarbonat und Pyridin mit 37,9 Teilen 1-Acetylamino-6-oxynaphtha- lin-3-sulfonsäure vereinigt. Der erhaltene Farb stoff wird abgeschieden und getrocknet.
Additional patent to main patent No. 227981. Process for the production of a trisazo dye. The present patent relates to a process for the production of a trisazo dye, characterized in that 1-diazo-4-oxybenzene-3-carboxylic acid is combined with 1-aminonaphthalene-7-sulfonic acid in an acidic medium,
the obtained and further diazotized monoazo dye is combined with 1-amino-2,5-dimethoxybenzene in an acid medium, the disazo dye obtained is further diazotized and the diazo compound is combined in an alkaline medium with 1-acetylamino-6-oxynaphthalene-3-sulfonic acid.
The trisazo dye obtained in this way is a dark powder which dissolves in concentrated t5 sulfuric acid with a greenish-black color and in water with a dark violet color and is precipitated from the aqueous solution as a blue precipitate on the addition of sodium hydroxide solution, and dyes cellulose-containing fibers in green 20-gray shades which are very washable and lightfast after treatment with metal salts.
Example: The diazo compound of the aminoazo dye prepared in acidic medium from 15.3 parts of 1-amino-4-oxybenzene-3-carboxylic acid and 22.3 parts - 1-aminonaphthalene-7-sulfonic acid is in the presence of excess sodium acetate with 15.3 parts of 1-amino-2,5-dimethoxybenzene combined,
the disazo dye obtained is further diazotized and the diazo compound is combined with 37.9 parts of 1-acetylamino-6-oxynaphthaline-3-sulfonic acid in the presence of excess sodium carbonate and pyridine. The dye obtained is deposited and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE232037X | 1941-09-10 | ||
CH227981T | 1942-08-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH232037A true CH232037A (en) | 1944-04-30 |
Family
ID=25727162
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH232037D CH232037A (en) | 1941-09-10 | 1942-08-14 | Process for the preparation of a trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH232037A (en) |
-
1942
- 1942-08-14 CH CH232037D patent/CH232037A/en unknown
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