DE473527C - Process for the production of chromium-containing azo dyes - Google Patents

Process for the production of chromium-containing azo dyes

Info

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
Application number
DEG66329D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chemische Ind Ges
GESELLSCHAFT fur CHEMISCHE INDUSTRIE
BASF Schweiz AG
Original Assignee
Chemische Ind Ges
GESELLSCHAFT fur CHEMISCHE INDUSTRIE
Gesellschaft fuer Chemische Industrie in Basel CIBA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chemische Ind Ges, GESELLSCHAFT fur CHEMISCHE INDUSTRIE, Gesellschaft fuer Chemische Industrie in Basel CIBA filed Critical Chemische Ind Ges
Application granted granted Critical
Publication of DE473527C publication Critical patent/DE473527C/en
Expired legal-status Critical Current

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)

PATENTANSPRUCH: Verfahren zur Herstellung von chromhaltigen Azofarbstoffen, dadurch gekennzeichnet, daß man den Azofarbstoff aus 6-Nitro-2-amino-i -phenol-4-sulfosäure und ß-Naphthol mit chromabgebenden Mitteln behandelt.PATENT CLAIM: Process for the production of chromium-containing azo dyes, characterized in that the azo dye from 6-nitro-2-amino-i-phenol-4-sulfonic acid and ß-naphthol treated with chromium donating agents.
DEG66329D 1925-02-16 1926-01-26 Process for the production of chromium-containing azo dyes Expired DE473527C (en)

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)

Similar Documents

Publication Publication Date Title
DE473527C (en) Process for the production of chromium-containing azo dyes
DE675558C (en) Process for the production of complex metal compounds of polyazo dyes
DE475686C (en) Process for the production of chromium-containing azo dyes
DE540086C (en) Process for the production of metal-containing azo dyes
DE528607C (en) Process for the production of chromium-containing dyes
DE719303C (en) Process for the production of azo dyes
DE120048C (en)
DE896187C (en) Process for producing real tints
DE591549C (en) Process for the production of water-insoluble azo dyes
DE631578C (en) Process for the production of water-soluble azo dyes
DE815513C (en) Process for the preparation of disazo or polyazo dyes
DE556478C (en) Process for the preparation of azo dyes
AT136364B (en) Process for the production of chromium-containing dyes.
DE625777C (en) Process for the production of azo dyes
DE889043C (en) Process for the production of azo dyes
DE483460C (en) Process for the production of chromium-containing azo dyes
DE728590C (en) Process for the production of azo dyes
DE880622C (en) Process for the preparation of copper-containing disazo dyes
DE411332C (en) Process for the preparation of yellow-brown stain-coloring disazo dyes
DE470178C (en) Process for the preparation of azo dyes
DE459989C (en) Process for the preparation of o-oxyazo dyes
CH105148A (en) Process for the production of a chromium-containing dye.
CH257111A (en) Process for the preparation of an azo dye.
CH175243A (en) Process for the production of a new metal-containing dye.
CH261844A (en) Process for the preparation of a metallizable o-oxymonoazo dye.