DE473527C - Process for the production of chromium-containing azo dyes - Google Patents
Process for the production of chromium-containing azo dyesInfo
- Publication number
- DE473527C DE473527C DEG66329D DEG0066329D DE473527C DE 473527 C DE473527 C DE 473527C DE G66329 D DEG66329 D DE G66329D DE G0066329 D DEG0066329 D DE G0066329D DE 473527 C DE473527 C DE 473527C
- Authority
- DE
- Germany
- Prior art keywords
- chromium
- production
- azo dyes
- containing azo
- black
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
Verfahren zur Herstellung von chromhaltigen Azofarbstoffen Die Chromverbindungen der o-Oxyazofarbstoffe haben bekanntlich eine große technische Bedeutung als sehr echte, sauer färbende Farbstoffe erlangt, und eine stattliche Anzahl solcher Produkte ist bereits auf dem Markt. Immerhin fehlen gewisse sehr wichtige Farbtöne, wie z. B. tiefe Schwarz oder solche Produkte, welche für Schwarz als Grundlage verwendet werden können. Es wurde nun gefunden, daß solche schwarzen bzw. für Schwarztöne verwendbaren Farbstoffe in den Chromverbindungen desjenigen o-Oxyazofarbstoffes vorliegen, welcher durch Kuppeln der diazotierten 6-Nitro-2-amino-i-phenol-4-sulfösäure und ß-Naphthol erhalten wird.Process for the production of chromium-containing azo dyes The chromium compounds the o-oxyazo dyes are known to be of great technical importance as very real, acidic dyes, and a good number of such products is already on the market. After all, certain very important colors are missing, such as B. deep black or those products that are used as a basis for black can be. It has now been found that such black or black tones usable dyes in the chromium compounds of that o-oxyazo dye present, which by coupling the diazotized 6-nitro-2-amino-i-phenol-4-sulfoic acid and β-naphthol is obtained.
Dieses Ergebnis ist deshalb als überraschend zu bezeichnen, weil der isomere Farbstoff aus dem diazotierten 4.-Nitro-2-aminophenol und 2-Oxynaphthalin-6-sulfosäure (cf. britische Patentschrift 2646o%igi2) unansehnliche violettbraune Töne liefert und die Chromverbindung des Diazofarbstoffes aus tetrazotierter 2, 6-Diamino-i-phenol-4-sulfosäure und ß-Naphthol (cf. britische Patentschrift 15 456(igi5) aus schwefelsaurem Bade ungenügend zieht.This result can be described as surprising because the isomeric dye from the diazotized 4-nitro-2-aminophenol and 2-oxynaphthalene-6-sulfonic acid (cf. British Patent 2646o% igi2) gives unsightly purple-brown tones and the chromium compound of the diazo dye from tetrazotized 2,6-diamino-i-phenol-4-sulfonic acid and β-naphthol (cf. British patent specification 15 456 (igi5) from sulfuric acid baths insufficiently draws.
Die neuen Farbstoffe bilden schwärzliche Pulver; sie lösen sich in Wasser mit rotv iolettschwarzer, in verdünnter Natronlauge mit violettschwarzer Färbung und färben Wolle aus saurem Bade in rötlichschwarzen Tönen von vorzüglichen Echtheitseigenschaften.The new dyes form blackish powders; they dissolve in Water with red-violet-black, in dilute caustic soda with violet-black Dyeing and dyeing wool from acid baths in reddish-black tones of exquisite Authenticity properties.
Beispiel 441 Teile des Farbstoffes aus 6-Nitro-2-amino-i-phenol-4-sulfosäure und ß-Naphthol (Natronsalz) werden in iooo Teilen Wasser- kochend gelöst. Das Gemisch wird hierauf mit 15,2 Teilen Chromoxyd in Form einer 4prozentigen Chromfluoridlösung längere Zeit am Rückflußkühler in Gegenwart von Glaspulver zum Sieden erhitzt. Der neue chromhaltige Farbstoff wird durch Verdampfen und Aussalzen gewonnen. Er erzeugt auf Wolle, aus saurem Bade gefärbt, sehr egale licht- und walkechte rotstichigschwarze Töne.EXAMPLE 441 parts of the dyestuff composed of 6-nitro-2-amino-i-phenol-4-sulfonic acid and β-naphthol (sodium salt) are dissolved in 1,000 parts at boiling water. The mixture is then heated with 1 5.2 parts of chromic oxide in the form of a 4 per cent chromium fluoride solution longer time at reflux in the presence of glass powder to boiling. The new chromium-containing dye is obtained by evaporation and salting out. On wool dyed from an acid bath, it produces very level, lightfast and whackfast, reddish black tones.
Ähnliche Produkte erhält man, wenn man statt Chromfluorid Chromacetat, Chromformiat oder neutrales, frisch gefälltes Chromhydroxyd verwendet.Similar products are obtained if, instead of chromium fluoride, chromium acetate, Chromium formate or neutral, freshly precipitated chromium hydroxide is used.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH473527X | 1925-02-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE473527C true DE473527C (en) | 1929-03-18 |
Family
ID=4516081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEG66329D Expired DE473527C (en) | 1925-02-16 | 1926-01-26 | Process for the production of chromium-containing azo dyes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE473527C (en) |
-
1926
- 1926-01-26 DE DEG66329D patent/DE473527C/en not_active Expired
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