CH172594A - 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
- CH172594A CH172594A CH172594DA CH172594A CH 172594 A CH172594 A CH 172594A CH 172594D A CH172594D A CH 172594DA CH 172594 A CH172594 A CH 172594A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxynaphthalene
- chromium
- azo dye
- dye
- mixture
- 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
Verfahren zur Herstellung eines chromhaltigen Azofarbstoifes. Es wurde gefunden, dass man einen chromhaltigen Azofarbstoff aus dem Gemisch des Azofarbstoffes aus dianotierter 1-Amino- 2-oxynaphthalin-4-sulfonsäure und 2-Oxynaph- thalin mit dem Azofarbstoff der durch Re duktion des Azofarbstoffes aus nitrierter 1 Diazo-2-oxynaphthalin-4-sulforisäure und 2- Oxynaphthalin erhalten wird, herstellen kann, wenn man dieses Gemisch,
ein Chromierungs- mittel und eine hydroxylgruppenhaltige or ganische Verbindung in ätzalkalischem Me dium aufeinander einwirken lässt.
Der erhaltene chrombaltige Farbstoff stellt ein schwarzes Pulver dar, das sich in Wasser leicht mit blauer Farbe löst. In 10 %iger Sodalösung sowie in 10 %iger Natronlauge löst er sich sehr schwer.
Er färbt Wolle aus organischsaurem schwefelsaurem Bade in blauschwarzen Tönen von vorzüglichen Echtheiten.
Beispiel: Man bereitet eine Kaliumchromitlösung aus 80 Teilen einer 8 %igen Chromoxyd- hydratpaste, entsprechend 6,4 Teilen Cr?Os, 100 Teilen einer 50 %igen Kalilauge und 12 Teilen Glycerin, und trägt 20,
8 Teile des Azofarbstoffes aus dianotierter 1-Amino- 2-oxynaphthalin-4-sulfonsäure und 2-oxynaph- thalin, sowie 21,5 Teile des Azofarbstoffes, der durch Reduktion des Azofarbstoffes aus nitrierter 1-Diazo-2-oxynaphthalin-4-sulfon- säure und 2-Oxynaphthaliri erhalten wird, ein.
Hierauf erwärmt man das Reaktions gemisch unter Rübren 6 Stunden auf 80 bis 90 0 sowie 2 Stunden auf 90-100 0, verdünnt mit 500 Teilen kaltem Wasser, filtriert, neutralisiert mit- stark verdünnter Mineral säure und scheidet den neuen chromhaltigen Farbstoff durch Beigabe von Kochsalz ab.
Ferner gelangt man zu demselben Farb stoff, wenn man, statt die Azofarbstoffe mit solchen Komplexverbindungen zu behandeln, die durch Einwirkung von hydroxylgruppen- haltigen organischen Verbindungen auf ätz- alkalische Chromhydroxydsuspensionen ent stehen, Chromsalze, sowie überschüssige Ätz- alkalien zusammen mit den hydroxylgruppen- haltigen organischen Verbindungen und den Azofarbstoffen erwärmt.
Process for the production of a chromium-containing azo dye. It has been found that a chromium-containing azo dye from the mixture of the azo dye from dianotated 1-amino-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene with the azo dye by reducing the azo dye from nitrated 1-diazo-2-oxynaphthalene -4-sulforic acid and 2- oxynaphthalene is obtained, can be prepared if this mixture,
a chromating agent and an organic compound containing hydroxyl groups in a caustic alkaline medium act on one another.
The chromium-containing dye obtained is a black powder which easily dissolves in water with a blue color. It is very difficult to dissolve in 10% soda solution and in 10% sodium hydroxide solution.
He dyes wool from organic acid sulfuric acid bath in blue-black shades with excellent fastness properties.
Example: A potassium chromite solution is prepared from 80 parts of an 8% chromium oxide hydrate paste, corresponding to 6.4 parts of Cr? Os, 100 parts of a 50% potassium hydroxide solution and 12 parts of glycerine, and 20,
8 parts of the azo dye from dianotated 1-amino-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene, and 21.5 parts of the azo dye obtained by reducing the azo dye from nitrated 1-diazo-2-oxynaphthalene-4-sulfone - Acid and 2-Oxynaphthaliri is obtained.
The reaction mixture is then heated with stirring for 6 hours to 80 to 90 0 and 2 hours to 90-100 0, diluted with 500 parts of cold water, filtered, neutralized with highly dilute mineral acid and the new chromium-containing dye is separated by adding sodium chloride from.
Furthermore, the same dye is obtained if, instead of treating the azo dyes with complex compounds that are formed by the action of hydroxyl-containing organic compounds on caustic alkaline chromium hydroxide suspensions, chromium salts and excess caustic alkalis together with the hydroxyl-containing ones organic compounds and the azo dyes.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH172594T | 1933-04-04 | ||
CH169697T | 1933-04-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172594A true CH172594A (en) | 1934-10-15 |
Family
ID=25718776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172594D CH172594A (en) | 1933-04-04 | 1933-04-04 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172594A (en) |
-
1933
- 1933-04-04 CH CH172594D patent/CH172594A/en unknown
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