CH287109A - 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
- CH287109A CH287109A CH287109DA CH287109A CH 287109 A CH287109 A CH 287109A CH 287109D A CH287109D A CH 287109DA CH 287109 A CH287109 A CH 287109A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- azo dye
- dyes
- gray
- dye
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 284075. Verfahren zur Herstellung eines ehromhaltigen Azofarbstoffes. Es wurde gefunden, dass man zu einem neuen wertvollen, chromhaltigen Azofarbstoff gelangt, wenn man auf ein Gemiseh der zwei 1Alonoazofarbstoffe, die den folgenden For meln
EMI0001.0007
entsprechen, chromabgebende Mittel derart einwirken lässt, dass ein chromhaltiger Azo- farbstoff entsteht,
der je ein Molekül der zwei Ausgangsmonoazofarbstoffe an ein Chrom atom komplex gebunden enthält.
Der neue ebronihaltige Farbstoff bildet ein graues Pulver, das sieh in Wasser mit violettgrauer und in konzentrierter Schwefel säure mit roter Farbe löst und Wolle aus neutralem oder schwach essigsaurem Bade in grauen Tönen färbt.
Die zwei beim vorliegenden Verfahren als Ausgangsstoffe dienenden Monoazofarbstoffe können nach an sieh bekannten Methoden her gestellt werden, indem man 6-Acetyla.mino-4- nitro Z-aniino-i-oxyberizol finit =1-Acetylamino- 7-oxyiiaplitliaiin und dianotiertes 2-Aniirio-1.- oxybenzol-4-sulfonsäureamid mit 2-Oxynaph- thalin jeweils in alkalischem Medium kuppelt.
Über die zu verwendenden chromabgebenden Mittel und Reaktionsbedingungen gibt das Hauptpatent Auskunft. <I>Beispiel:</I> 18,8 Teile 2-Amino-l-oxybenzol-4-sulfon- säureamid werden in 200 Teilen Wasser -Lind 15 Volumteilen 10-n-Salzsäure aufgesehlämmt und bei 5 bis 10 mit 25 Volumteilen 4-n-Na- triumnitritlösung dianotiert.
Die durch Zu gabe von Natriumcarbonat neutralisierte Di- azoverbindiuig lässt man einlaufen in eine mit Eis auf 0 abgekühlte Lösung von 14,8 Teilen 2-Oxy naphthalin in 52 Volumteilen 2-n-Na- triumhydroxy dlösung und 50 Volumteilen 2- n-Natriumcarbonatlösung. Nach beendeter Kupplung wird der abgeschiedene Farbstoff filtriert und mit verdünnter Natritunchlorid- lösung gewaschen
und getrocknet. 36,6 Teile des so erhaltenen Farbstoffes und 42,3 Teile des aus 6-Aeetyjamino-4-nitro=?-aniino-l-oxy- benzol und 1-Acetylamino-7-oxynaphthalin nach ähnlicher Methode erhaltenen Farbstof fes werden in 3000 Teilen Wasser aufge- sehlämmt und mit 220 Teilen einer Lösung von ehromsaliey lsaurem Natrium mit einem Chromgehalt von 2,6 1/o versetzt.
Nach 6 Stun den Kochen am Rückflusskühler ist die Chro- mierung beendet. Die erhaltene Chromver bindung wird durch Natriumchloridzugabe abgeschieden und abfiltriert.
<B> Additional patent </B> to main patent no. 284075. Process for the production of an azo dye containing Ehrom. It has been found that a new valuable, chromium-containing azo dye is obtained if one uses a mixture of the two 1-alonoazo dyes which have the following formulas
EMI0001.0007
correspond, let chromium-releasing agents act in such a way that an azo dye containing chromium is formed,
which contains one molecule of each of the two starting monoazo dyes bound to a chromium atom in a complex.
The new ebroni-containing dye forms a gray powder that dissolves in water with a violet-gray color and in concentrated sulfuric acid with a red color and dyes wool from neutral or weakly acetic acid baths in gray tones.
The two monoazo dyes used as starting materials in the present process can be prepared by methods known per se by adding 6-Acetyla.mino-4-nitro Z-aniino-i-oxyberizole finite = 1-acetylamino-7-oxyiiaplitliaiin and dianotated 2- Aniirio-1-oxybenzene-4-sulfonic acid amide couples with 2-oxynaphthalene in an alkaline medium.
The main patent provides information about the chromium-releasing agents and reaction conditions to be used. <I> Example: </I> 18.8 parts of 2-amino-1-oxybenzene-4-sulfonic acid amide are slurried in 200 parts of water and 15 parts by volume of 10N hydrochloric acid and at 5 to 10 with 25 parts by volume 4 -n-sodium nitrite solution dianotized.
The azo compound neutralized by adding sodium carbonate is allowed to run into a solution, cooled to 0 with ice, of 14.8 parts of 2-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 washed with dilute sodium chloride solution
and dried. 36.6 parts of the dye thus obtained and 42.3 parts of the dye obtained from 6-acetylamino-4-nitro =? - aniino-1-oxybenzene and 1-acetylamino-7-oxynaphthalene by a similar method are in 3000 parts Mashed up water and mixed with 220 parts of a solution of Ehromsaliey acid sodium with a chrome content of 2.6 1 / o.
After 6 hours of boiling on the reflux condenser, the chroming is complete. The chromium compound obtained is deposited by adding sodium chloride and filtered off.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH287109T | 1949-11-18 | ||
CH284075T | 1949-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH287109A true CH287109A (en) | 1952-11-15 |
Family
ID=25732358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH287109D CH287109A (en) | 1949-11-18 | 1949-11-18 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH287109A (en) |
-
1949
- 1949-11-18 CH CH287109D patent/CH287109A/en unknown
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