CH298509A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH298509A CH298509A CH298509DA CH298509A CH 298509 A CH298509 A CH 298509A CH 298509D A CH298509D A CH 298509DA CH 298509 A CH298509 A CH 298509A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- parts
- preparation
- disazo dye
- red
- 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
- C09B31/02—Disazo dyes
- C09B31/12—Disazo dyes from other coupling components "C"
- C09B31/14—Heterocyclic components
- C09B31/153—Heterocyclic components containing a six-membered ring with one nitrogen atom as the only ring hetero-atom
- C09B31/157—Quinolines or hydrogenated quinolines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Optical Filters (AREA)
Description
Verfahren zur Herstellung eines Disazofarbstoffes. Es: wurde gefunden; dass man zu einem wertvollen Disazofarbstoff gelangt, wenn man
EMI0001.0009
mit 8-Oxychinolin kuppelt.
Der neue Farbstoff bildet ein dunkles Pul ver, das sich in verdünnten Alkalien mit roter und in konzentrierter Schwefelsäure mit vio letter Farbe löst und Baumwolle nach dem ein- oder zweibadigen Nachkupferungsverfah- ren in sehr gut wasch- und lichtechten, roten Tönen färbt.
Den Aminomonoazofarbstoff der obigen Formel erhält man durch Kupplung von di- azotiertem 2-Amino-l-oxybenzol-4-carbonsäure- phenylamid mit 2-(4'-Aminobenzoyl)-amino-5- oxynaphthalin-7-sulfonsäuee. Die Kupplung der Diazoverbindungen dieses Aminoazofarb- stoffes mit dem 8-Oxychinolin erfolgt vorteil haft in alkalischem Medium.
<I>Beispiel:.</I> 22,8 Teile 1-Oxy-2-aminobenzol-4-earbon- 3o säurephenylamid werden unter Zusatz von 6,9 Teilen Natriumnitrit und 27 Teilen 30 % iger eine Diazoverbindung des A.minomonoazofarb- stoffes der Formel Salzsäure bei 0 diazotiert, und die Diäzover- bindimg wird mit 35,8 Teilen 2-(4'-Äminoben- zoyl)
-amino-5-oxynaphthalin-7-sulfonsäure in natriumcarbonatalkalischem Medium gekup pelt.
Der mit Natriumchlorid abgeschiedene, fil trierte und abgepresste Aminomonoazofarb- stoff wird in 400 Teilen Wasser unter Zusatz von 7 Teilen Natriumnitrit angerührt und die entstehende Suspension auf 5 abgekühlt. Hier auf versetzt man mit 30 Teilen 30 % iger Salz säure und rührt etwa 2 Stunden. Die erhaltene Diazoverbindung versetzt man nun mit einer Lösung aus 14,5 Teilen 8-Oxychinolin und 12 Teilen 30 % iger Salzsäure in 50 Teilen Wasser.
Anschliessend gibt man 50 Teile 30 % ige Natriumhydroxydlösung dazu und rührt einige Stunden, erwärmt dann auf 65 , fügt 100 Teile Natriumchlorid zu, um eine gut filtrierbare Form zu erhalten, filtriert und trocknet den Niederschlag.
Process for the preparation of a disazo dye. It was found; that you get a valuable disazo dye if you
EMI0001.0009
couples with 8-oxyquinoline.
The new dye forms a dark powder that dissolves in dilute alkalis with red and in concentrated sulfuric acid with violet color and colors cotton in very washable and lightfast red shades using the one or two-bath copper plating process.
The aminomonoazo dye of the above formula is obtained by coupling diazo-1-amino-1-oxybenzene-4-carboxylic acid phenylamide with 2- (4'-aminobenzoyl) amino-5-oxynaphthalene-7-sulfonic acid. The coupling of the diazo compounds of this aminoazo dye with the 8-oxyquinoline is advantageously carried out in an alkaline medium.
<I> Example:. </I> 22.8 parts of 1-oxy-2-aminobenzene-4-earbon- 3o säurephenylamid are with the addition of 6.9 parts of sodium nitrite and 27 parts of 30% a diazo compound of A.minomonoazofarb- substance of the formula hydrochloric acid is diazotized at 0, and the Diäzover- bindimg is 35.8 parts 2- (4'-Äminoben- zoyl)
-amino-5-oxynaphthalene-7-sulfonic acid in an alkaline sodium carbonate medium.
The aminomonoazo dye separated out with sodium chloride, filtered and pressed out is stirred in 400 parts of water with the addition of 7 parts of sodium nitrite and the resulting suspension is cooled to 5. 30 parts of 30% strength hydrochloric acid are added and the mixture is stirred for about 2 hours. The resulting diazo compound is then mixed with a solution of 14.5 parts of 8-oxyquinoline and 12 parts of 30% strength hydrochloric acid in 50 parts of water.
Then 50 parts of 30% sodium hydroxide solution are added and the mixture is stirred for a few hours, then heated to 65, 100 parts of sodium chloride are added in order to obtain an easily filterable form, and the precipitate is filtered and dried.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH298509T | 1952-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH298509A true CH298509A (en) | 1954-05-15 |
Family
ID=4489973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH298509D CH298509A (en) | 1952-01-25 | 1951-03-08 | Process for the preparation of a disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH298509A (en) |
-
1951
- 1951-03-08 CH CH298509D patent/CH298509A/en unknown
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