CH235450A - Process for the preparation of a trisazo dye. - Google Patents
Process for the preparation of a trisazo dye.Info
- Publication number
- CH235450A CH235450A CH235450DA CH235450A CH 235450 A CH235450 A CH 235450A CH 235450D A CH235450D A CH 235450DA CH 235450 A CH235450 A CH 235450A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- combined
- amino
- preparation
- diazotized
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (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-ogybenzol-3-:carbonsäure in ,saurem Medium mit 1-Amino-naphthalin-7-sulfon- säure vereinigt, den so erhaltenen Amin:
oazo- farbstoff @diazotiert, die Diazoverbindung in saurem Medium mit 1-Amino-2.5-@dimethogy- benzol vereinigt, wieder diazotiert und :die Diazoverbindung des so erhaltenen Amino- disazofarbstoffes in alkalischem Medium mit 1-Naphthod-3-sulfonsäure vereinigt.
Der so erhaltene Trisazofarbstoff ist ein dunkles Pulver, das sich. in Wasser mit marineblauer, in konzentrierter Schwefel säure mit blauschwarzer Farbe löst, und färbt Baumwolle in grünstichig blauen Tönen. Die Färbungen werden durch Nachbehan:dieln mit Chro:mi- oder Kupfersalzen etwas röter und sehr waschecht.
Beispiel: Die aus 15,3 Teilen 1-Amino-4-ogybenzol- 3-earbonsäure hergestellte Diazoverbindung wird in. Gegenwart von überschüssigem Na, triumacetat mit einer Lösung des Natrium- sal,zes von 22,3 Teilen 1-Amino-naphthalin-7- sulfon;
säure vereiuigt. Nach beendeter Kupp lung wind der Farbstoff weitendiazotiert und die Diazoverbindung in essigsaurer Lösung mit 15 Teilen 1-Amino,2.5-,dimetho-,-,ybenzol vereinigt. Der Farbstoff wird abgeschieden und durch Anrühren -mit Eis und Salzsäure und Zugabe einer Lösung von Natriumnitrit weiterdiazotiert.
Dfie Diazosuspension vereinigt man. bei 0-5 mit einer s:o,daalkasis:ehen Lösung von 22,4 Teilen; 1-Nap@hthol-3-sulfoonsäure; wobei ein Zusatz von Pyridin vorteilhaft ist.
Process for the preparation of a trisazo dye. The present patent relates to a process for the preparation of a trisazo dye, characterized in that: 1-diazo-4-ogybenzene-3-: carboxylic acid is combined with 1-amino-naphthalene-7-sulfonic acid in an acidic medium, the amine thus obtained:
oazo dye @diazotized, the diazo compound combined in an acidic medium with 1-amino-2.5-@dimethogybenzene, diazotized again and: the diazo compound of the amino disazo dye thus obtained combined in an alkaline medium with 1-naphthod-3-sulfonic acid.
The trisazo dye thus obtained is a dark powder that becomes. Dissolves in water with navy blue, in concentrated sulfuric acid with a blue-black color, and dyes cotton in greenish blue tones. After treatment with chromium or copper salts, the colors become a little redder and very washable.
Example: The diazo compound prepared from 15.3 parts of 1-amino-4-ogybenzene-3-carboxylic acid is mixed with a solution of the sodium salt of 22.3 parts of 1-amino-naphthalene in the presence of excess sodium acetate. 7-sulfone;
acidity. After the coupling has ended, the dye is diazotized and the diazo compound is combined in acetic acid solution with 15 parts of 1-amino, 2.5-, dimetho -, -, ybenzene. 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 s: o, daalkasis: a solution of 22.4 parts; 1-Nap @ hthol-3-sulfoic acid; an addition of pyridine is advantageous.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE235450X | 1942-06-02 | ||
CH231710T | 1943-05-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH235450A true CH235450A (en) | 1944-11-30 |
Family
ID=25727621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH235450D CH235450A (en) | 1942-06-02 | 1943-05-14 | Process for the preparation of a trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH235450A (en) |
-
1943
- 1943-05-14 CH CH235450D patent/CH235450A/en unknown
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