CH235452A - Process for the preparation of a trisazo dye. - Google Patents
Process for the preparation of a trisazo dye.Info
- Publication number
- CH235452A CH235452A CH235452DA CH235452A CH 235452 A CH235452 A CH 235452A CH 235452D A CH235452D A CH 235452DA CH 235452 A CH235452 A CH 235452A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- combined
- amino
- diazo
- carboxylic acid
- 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
- C09B31/20—Trisazo dyes from a coupling component"D" containing a directive hydroxyl group
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Trisazofarbstoffes. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung eines Trisazo- farbstoffes,dadurch gekennzeichnet, dass man 1-Diazo-4-oxybenzol-3-carbonsäure in saurem Medium mit 1-Amino-naphthalin-7-sulfon- säure, vereinigt, den so erhaltenen Amino- azofarbstoff diazotiert,
die Diazove-rbindung in saurem Medium mit 1-Amino-2.5-dimeth- oxybenzol vereinigt, wieder diazotiert und .die Diazoverhindung des so erhaltenen Amino- dis.azofarbstoffes in alkalischem Medium mit. 2- Oxynaphthalin-3-carbonsäure-6-sulf onsäure vereinigt.
Der so erhaltene Trisazofarbstoff ist ein dunkles Pulver, das sich in Wasser mit grau blauer, in konzentrierter Schwefelsäure mit b.lausehwarzer Farbe .löst, und färbt Baum wolle in .grünstichig grauen Tönen. Die Fär bungen werden .durch Nachbehandeln mit Ghromi- oder Kupfersalzen etwas röter und sehr waschecht.
<I>Beispiel:</I> Die aus 15,3 Teilen 1-Amin,o-4-oxybenzol- 3=earbonsäure hergestellte Diazoverbindung wird in Gegenwart von überschüssigem Na triumacetat mit einer Lösung des Natrium salzes von 22,3 Teilen 1-A.mino-naphthalin-7- sulfonsäure vereinigt. Nach beendeter Kupp lung wird der Farbstoff weiterdiazotiert und die Diazoverbindung in essigsaurer Lösung mit 15 ,Teilen 1-Amino-2.5-dimethoxybenzol vereinigt.
Der Farbstoff wird abgeschieden und durch Anrühren mit Eis und Salzsäure und Zugabe einer Lösung von Natriumnitrit weiterdiazotiert.
Die Diazosuspens.ion vereinigt man bei 0-5 mit einer sodaadkalis,chen Lösung von 26,8 Teilen 2-Oxynaphthalin-3-carbonsäure- 6-sulfonsäure, wobei ein Zusatz von Pyridin vorteilhaft ist.
Process for the preparation 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 in an acidic medium with 1-aminonaphthalene-7-sulfonic acid, the so diazotized amino azo dye obtained,
the diazo bond in an acidic medium is combined with 1-amino-2,5-dimethoxybenzene, diazotized again and the diazo bond of the amino dis.azo dye thus obtained in an alkaline medium with. 2-oxynaphthalene-3-carboxylic acid-6-sulfonic acid combined.
The trisazo dye obtained in this way is a dark powder that dissolves in water with gray-blue, in concentrated sulfuric acid with a louse-black color, and dyes cotton in green-tinged gray tones. After treatment with ghromi or copper salts, the colors become a little redder and very washable.
<I> Example: </I> The diazo compound produced from 15.3 parts of 1-amine, o-4-oxybenzene- 3 = carboxylic acid is trium acetate with a solution of the sodium salt of 22.3 parts 1- A.mino-naphthalene-7-sulfonic acid combined. After coupling has ended, the dye is further diazotized and the diazo compound is combined in acetic acid solution with 15 parts of 1-amino-2,5-dimethoxybenzene.
The dye is deposited and further diazotized by stirring with ice and hydrochloric acid and adding a solution of sodium nitrite.
The diazo suspension is combined at 0-5 with a sodaadkalis, chen solution of 26.8 parts of 2-oxynaphthalene-3-carboxylic acid-6-sulfonic acid, the addition of pyridine being advantageous.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE235452X | 1942-06-02 | ||
CH231710T | 1943-05-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH235452A true CH235452A (en) | 1944-11-30 |
Family
ID=25727623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH235452D CH235452A (en) | 1942-06-02 | 1943-05-14 | Process for the preparation of a trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH235452A (en) |
-
1943
- 1943-05-14 CH CH235452D patent/CH235452A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH238453A (en) | Process for the preparation of a copper-compatible polyazo dye. | |
CH235452A (en) | Process for the preparation of a trisazo dye. | |
CH235450A (en) | Process for the preparation of a trisazo dye. | |
CH235451A (en) | Process for the preparation of a trisazo dye. | |
CH235454A (en) | Process for the preparation of a trisazo dye. | |
CH235453A (en) | Process for the preparation of a trisazo dye. | |
CH235455A (en) | Process for the preparation of a trisazo dye. | |
CH235449A (en) | Process for the preparation of a trisazo dye. | |
CH235446A (en) | Process for the preparation of a trisazo dye. | |
CH238518A (en) | Process for the production of a new azo dye. | |
CH229358A (en) | Process for the preparation of a trisazo dye. | |
CH164740A (en) | Process for the production of a new azo dye. | |
CH121711A (en) | Process for the preparation of an azo dye. | |
CH284416A (en) | Process for the preparation of a disazo dye. | |
CH235445A (en) | Process for the preparation of a trisazo dye. | |
CH191739A (en) | Process for the preparation of an azo dye. | |
CH296539A (en) | Process for the preparation of a trisazo dye. | |
CH148003A (en) | Process for the preparation of a disazo dye. | |
CH228845A (en) | Process for the preparation of a tetrakisazo dye. | |
CH302033A (en) | Process for the preparation of a chromable disazo dye. | |
CH192045A (en) | Process for the production of a new azo dye. | |
CH235447A (en) | Process for the preparation of a trisazo dye. | |
CH190617A (en) | Process for the preparation of a chromable azo dye. | |
CH86982A (en) | Process for the production of an azo dye particularly suitable for cotton printing. | |
CH190900A (en) | Process for the preparation of a metal-containing nitro-disazo dye. |