CH322873A - Process for the preparation of a cobalt-containing disazo dye - Google Patents
Process for the preparation of a cobalt-containing disazo dyeInfo
- Publication number
- CH322873A CH322873A CH322873DA CH322873A CH 322873 A CH322873 A CH 322873A CH 322873D A CH322873D A CH 322873DA CH 322873 A CH322873 A CH 322873A
- Authority
- CH
- Switzerland
- Prior art keywords
- cobalt
- disazo dye
- preparation
- containing disazo
- parts
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Herstellung eines kobalthaltigen Disazofarbstofes Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines kobalt- haltigen Disazofarbstoffes, welches darin be steht, dass man die durch Kuppeln von diazo- tiertem 3-Amino-4-oxy-1,1'-azobenzol mit 2- Oxynaphthalin-4-sulfonsäure erhältliche was serlösliche Disazoverbindung mit einem ko- baltabgebenden Mittel behandelt.
Im nachfolgenden Beispiel bedeuten. die Teile Gewichtsteile und die Prozente Gewichts prozente.
<I>Beispiel</I> 44,8 Teile der durch Kuppeln von dia.zo- tiertem 3-Amino-4-oxy-1,1'-azobenzol mit 2- Oxynaphthalin-4-sulfonsäure erhältlichen Dis azoverbindung werden zusammen mit 4 Teilen Natriumhydroxyd in 1000 Teilen Wasser von 80 gelöst.
Bei 60 tropft man zur Lösung unter gutem Rühren ein Gemisch aus 14,2 Tei len kristallisiertem Kobaltosulfat, 130 Teilen 3o/oiger wässeriger Weinsäurelösung und 18,4 Teilen 30o/oiger Natriumhydroxydlösung. Nach halbstündigem Rühren der Masse wird die entstandene Kobaltkomplexverbindung daraus durch Zusatz von Natriumchlorid abgeschie den, hierauf abfiltriert und getrocknet.
Der neue kobalthaltige Disazofarbstoff ist ein dunkles Pulver, welches Wolle, Seide -Lind synthetische Polyamidfasern in braunen Tö nen färbt.
Process for the preparation of a cobalt-containing disazo dye The present patent relates to a process for the preparation of a cobalt-containing disazo dye, which consists in the fact that the 3-amino-4-oxy-1,1'-azobenzene-coated by coupling of diazo- 2- oxynaphthalene-4-sulfonic acid, which is soluble in disazo compound, is treated with a cobalt-donating agent.
In the example below, mean. the parts are parts by weight and the percentages are percentages by weight.
<I> Example </I> 44.8 parts of the disazo compound obtainable by coupling dia.zo- tated 3-amino-4-oxy-1,1'-azobenzene with 2-oxynaphthalene-4-sulfonic acid are combined with 4 Parts of sodium hydroxide dissolved in 1000 parts of 80 water.
At 60, a mixture of 14.2 parts of crystallized cobalt sulfate, 130 parts of 3o /% aqueous tartaric acid solution and 18.4 parts of 30% sodium hydroxide solution is added dropwise to the solution with thorough stirring. After stirring the mass for half an hour, the resulting cobalt complex compound is deposited therefrom by adding sodium chloride, then filtered off and dried.
The new cobalt-containing disazo dye is a dark powder which dyes wool, silk and synthetic polyamide fibers in brown tones.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH297842T | 1953-01-21 | ||
CH322873T | 1953-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH322873A true CH322873A (en) | 1957-06-30 |
Family
ID=25733880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH322873D CH322873A (en) | 1953-01-21 | 1953-01-21 | Process for the preparation of a cobalt-containing disazo dye |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH322873A (en) |
-
1953
- 1953-01-21 CH CH322873D patent/CH322873A/en unknown
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