CH172606A - 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
- CH172606A CH172606A CH172606DA CH172606A CH 172606 A CH172606 A CH 172606A CH 172606D A CH172606D A CH 172606DA CH 172606 A CH172606 A CH 172606A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- diazotized
- dye
- amino
- azo 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)
Description
Verfahren zur Herstellung eines chromhaltigen Azofarbstof%s. Es wurde gefunden, dass durch Einwir kung chromabgebender Mittel auf ein Ge misch aus dem Azofarbstoff aus diazotier- ter 1.-Amiilo-2-oxynaphthalin-4-sulfonsäure und 2-Oxynaplithalin mit den Azofarbstoffen aus diazotierter ?- Amino-1.-phenol-4 .
6-disul- fonsäure und 1-Pheriyl-3-methyl-5-pyrazolon, sowie aus diazotierter 4-Nitro-2-amino-l-phe- iiol-6-sulfon.ä,ure und 1-Phenyl-3-methyl-5- pyrazolon ein eliromhaltiger Azofarbstoff hergestellt werden kann, wenn als chrom abgebende Mittel solche Mengen Alkali- chromitlösiingen verwendet werden,
die auf die drei chromierbaren Gruppen der Azo- farbstoffe mindestens drei Atome Chrom ent halten.
Der erhaltene chromhaltige Farbstoff stellt ein schwarzes Pulver dar, das sich in Wasser, sowie in 10 % iger Sodalösung mit schwärzlich violettbrauner und in 10%iger Natronlauge mit schwärzlich roter Farbe löst. Der Farbstoff färbt Wolle aus orga: nischsaurem-schwefelsaurem Bade in violett braunen, sehr echten Tönen.
Beispiel: In eine frisch bereitete Chromitlösung, die in üblicher Weise durch Verrühren von 47,5 Teilen einer 8%igen Chromoxydhydrat- paste, entsprechend 3,8 Teilen Cr203, mit 28 Teilen Xtzkali bei<B>60</B> bis 70 erhalten wurde, trägt man 10,4 Teile des Azofarb- stoffes aus diazotierter 1-Amino-2-oxynaph- thalin-4-sulfonsä,ure und 2-Oxynaphthalin, 6,
2 Teile des Azofarbstoffes aus diazotierter 2- Amino-l-phenol-4 . 6-disulfonsäure und 1-Phenyl-3-methyl-5-pyrazolon, sowie 5,5 Teile des Azofarbstoffes aus diazotierter 4-Nitro-2-amino-l-phenol-:
6-sulfonsäure und 1-Phenyl-3-methyl-5-pyrazolon ein. Man er wärmt das Reaktionsgemisch 14 Stunden auf 74 bis<B>78',</B> verdünnt hierauf mit 300 Teilen heissem Wasser, filtriert von eventuell vor handenen ungelösten Bestandteilen ab und neutralisiert das Filtrat mit verdünnter Mineralsäure. Der chromhaltige Farbstoff wird durch Beigabe von Kochsalz abgeschie den.
Process for the production of a chromium-containing azo dye% s. It has been found that the action of chromium-releasing agents on a mixture of the azo dye from diazotized 1.-amilo-2-oxynaphthalene-4-sulfonic acid and 2-oxynaplithalin with the azo dyes from diazotized? - amino-1.-phenol -4.
6-disulfonic acid and 1-pheriyl-3-methyl-5-pyrazolone, as well as from diazotized 4-nitro-2-amino-1-phenol-6-sulfonic acid and 1-phenyl-3-methyl -5- pyrazolon an elirom-containing azo dye can be produced if such amounts of alkali chromite solutions are used as chromium releasing agents,
which contain at least three chromium atoms on the three chromable groups of the azo dyes.
The chromium-containing dye obtained is a black powder which dissolves in water and in 10% strength soda solution with a blackish violet-brown color and in 10% strength sodium hydroxide solution with a blackish red color. The dye dyes wool from organic acid-sulfuric acid bath in violet-brown, very real shades.
Example: In a freshly prepared chromite solution, obtained in the usual way by stirring 47.5 parts of an 8% chromium oxide hydrate paste, corresponding to 3.8 parts Cr203, with 28 parts Xtzkali at <B> 60 </B> to 70 one carries 10.4 parts of the azo dye from diazotized 1-amino-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene, 6,
2 parts of the azo dye from diazotized 2-amino-1-phenol-4. 6-disulfonic acid and 1-phenyl-3-methyl-5-pyrazolone, and 5.5 parts of the azo dye from diazotized 4-nitro-2-amino-1-phenol-:
6-sulfonic acid and 1-phenyl-3-methyl-5-pyrazolone. The reaction mixture is warmed for 14 hours to 74 to 78 ', then diluted with 300 parts of hot water, any undissolved constituents present are filtered off and the filtrate is neutralized with dilute mineral acid. The chromium-containing dye is deposited by adding common salt.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH172606T | 1933-04-21 | ||
CH169699T | 1933-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172606A true CH172606A (en) | 1934-10-15 |
Family
ID=25718788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172606D CH172606A (en) | 1933-04-21 | 1933-04-21 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172606A (en) |
-
1933
- 1933-04-21 CH CH172606D patent/CH172606A/en unknown
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