CH287091A - Process for the preparation of a chromium-containing azo dye. - Google Patents
Process for the preparation of a chromium-containing azo dye.Info
- Publication number
- CH287091A CH287091A CH287091DA CH287091A CH 287091 A CH287091 A CH 287091A CH 287091D A CH287091D A CH 287091DA CH 287091 A CH287091 A CH 287091A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- dye
- acid
- azo dye
- complex
- 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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
- C09B45/16—Monoazo compounds containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum hauptpatent Nr.<B>284075.</B> Verfahren zur Herstellung eines chromhaltigen Azofarbstoffes. Es wurde gefiuiden, da.ss man zu einem wertvollen, heuen chromhaltigen Azofarbstoff gelangt, wenn man auf den Monoazofarbstoff der Formel
EMI0001.0010
eliroinahg@el)encle Mittel derart einwirken lä.sst, dass ein ehromlialtiger Azofarbstoff entsteht,
der zwei Monoazofarbstoffmoleküle an ein Chromatom komplex gebunden enthält.
Der neue ehromlialtige Farbstoff bildet ein graublaues Pulver, das sich in Wasser mit blauer, in konzentrierter Schwefelsäure mit roter Farbe löst und Wolle aus neutralem oder essigsaurem Bade in grauen Tönen färbt.
Über die verwendeten chromabgebenden Mittel sowie über die Reaktionsbedingungen gibt das Hauptpatent Auskunft.
Beispiel: '14,4 Teile '-Aniino-l-oxvbenzol-4-sLilfon- säure-N-diätliyla.niid werden in 200 Teilen Wasser und 1.5 Volumteilen 10-n-Salzsäure aiifgesehlä mnit Lind bei<B>)</B> bis 10" mit 25 Vo- lumteilen 4-n-Natriiininitritlösung dianotiert.
Die dureli Zugabe von Natriumearbonat neu tralisierte Diazoverbindung lässt man einlau fen in eine mit Eis auf 0 abgekühlte Lösung von 20;5 Teilen 1-Acetylamino-7-oxynaphtha- lin in 52 Volumteilen 2-n-Natriumlivdroxyd- lösung und 50 Voluinteilen 2-n-Natriumearbo- natlösung. Nach beendeter Kupplung wird der abgeschiedene Farbstoff filtriert und mit ver dünnter Natriumehloridlösung
gewaschen. Cle- troeknet stellt er ein schwarzes Pulver dar, das sieh in heissem Wasser mit. violetter und in konzentrierter Schwefelsäure mit roter Farbe löst.
Der naeli obigen Angaben erhaltene Filter kuchen des Farbstoffes wird in<B>1500</B> Teilen Wasser aufgeschlämmt und mit 200 Teilen einer Lösung von ehromsalicylsaurem Kalium- Natrium mit einem Chromgehalt von 1,85 1/o versetzt.
Die Lösung von ehromsaliey lsaurem Kalium-Natrium erhält man zum Beispiel durch Aufkochen von 100 Teilen einer Chrom sulfatlösung (Cr-SO4OH) mit einem Chrom- gehal.t von 3,71/o mit 19,6 Teilen Salieylsäure,
Lösen des entstandenen Niederschlages durch Zugabe von 15 Volumteilen 10-n-Nat.rium- liydroxy dlösung und 1.5 Volumteilen 10-n-Ka- liumhy-droxydlösung Lind Einstellen mit Was ser auf 200 Teile.
Das Chromiergemisch wird %välirend etwa 5 Stunden bei Siedetemperatur gehalten und die so erhaltene Chromverbin dung des Farbstoffes durch Natriumehlorid- zii-@abe abgeschieden und abfiltriert.
Additional patent to main patent no. <B> 284075. </B> Process for the production of a chromium-containing azo dye. It has been found that a valuable, hay chromium-containing azo dye is obtained by using the monoazo dye of the formula
EMI0001.0010
eliroinahg @ el) encle agent lets act in such a way that an Ehromlialtiger azo dye is created,
which contains two monoazo dye molecules bound to a chromium atom in a complex.
The new Ehromlialtige dye forms a gray-blue powder that dissolves in water with blue, in concentrated sulfuric acid with red color and dyes wool from neutral or acetic acid bath in gray tones.
The main patent provides information about the chromium-releasing agents used and the reaction conditions.
Example: 14.4 parts of aniino-1-oxybenzene-4-sulfonic acid-N-dietliyla.niid are added in 200 parts of water and 1.5 parts by volume of 10-N hydrochloric acid with and at <B>) </ B > up to 10 "with 25 parts by volume of 4-n-sodium nitrite solution.
The diazo compound neutralized by adding sodium carbonate is allowed to run into a solution, cooled to 0 with ice, of 20.5 parts of 1-acetylamino-7-oxynaphthalene in 52 parts by volume of 2-n-sodium hydroxide solution and 50 parts by volume of 2-n -Sodium carbonate solution. After the coupling has ended, the deposited dye is filtered and diluted with sodium chloride solution
washed. Cleftone is a black powder that can be seen in hot water. violet and dissolves in concentrated sulfuric acid with red color.
The filter cake of the dye obtained in accordance with the above information is slurried in 1500 parts of water and mixed with 200 parts of a solution of sodium salicylic acid with a chromium content of 1.85 1 / o.
The solution of ehromsaliey potassium-sodium acid is obtained, for example, by boiling 100 parts of a chromium sulfate solution (Cr-SO4OH) with a chromium content of 3.71 / o with 19.6 parts of salicic acid,
Dissolve the resulting precipitate by adding 15 parts by volume of 10-n-sodium hydroxide solution and 1.5 parts by volume of 10-n-potassium hydroxide solution and adjusting with water to 200 parts.
The chromating mixture is kept at the boiling point for about 5 hours and the chromium compound of the dye thus obtained is separated off by sodium chloride chloride and filtered off.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH284075T | 1949-11-18 | ||
CH287091T | 1949-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH287091A true CH287091A (en) | 1952-11-15 |
Family
ID=25732340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH287091D CH287091A (en) | 1949-11-18 | 1949-11-18 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH287091A (en) |
-
1949
- 1949-11-18 CH CH287091D patent/CH287091A/en unknown
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