GB186635A - Manufacture of chromium compounds of azo-dyestuffs - Google Patents
Manufacture of chromium compounds of azo-dyestuffsInfo
- Publication number
- GB186635A GB186635A GB851621A GB851621A GB186635A GB 186635 A GB186635 A GB 186635A GB 851621 A GB851621 A GB 851621A GB 851621 A GB851621 A GB 851621A GB 186635 A GB186635 A GB 186635A
- Authority
- GB
- United Kingdom
- Prior art keywords
- compounds
- chromium
- diazotized
- dyestuff
- amino
- 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
- C09B45/01—Complex metal compounds of azo dyes characterised by the method of metallisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Coloring (AREA)
Abstract
The chromium compounds of chromable azo dyes described in the parent Specification are prepared by treating the dyestuffs in question in alkaline solution with the complex chromium compounds made by action of alkaline suspensions of chromium hydroxide on organic compounds containing more than one hydroxyl group. The process permits the use of iron vessels. According to examples:-(1) the dyestuff from diazotized 1-amino-2-oxynaphthalene-4-sulphonic acid and a -naphthol, or that from diazotized 1-oxy-2-amino-4-methylbenzene-6-sulphonic acid and b -naphthol is refluxed with the product made by heating glycerin with caustic potash and chromium hydroxide paste; after diluting with water and neutralizing free alkali the dyestuff is salted out; (2) the dyestuff from diazotized 1-oxybenzene-2-amino-4-chloro-6-sulphonic acid and 1-phenyl-3-methyl-5-pyrazolone is boiled with the chromium compound from gallic acid or glucose, the free alkali neutralized and the chromium compound salted out. The products dye wool blue, violet or red shades fast to light and fulling. Complex chromium compounds of organic compounds containing more than one hydroxyl group are obtained by heating with alkaline suspensions of chromium hydroxide the parent compounds, for instance, polyhydric alcohols and phenols, tanning agents, sugars, degradation products of cellulose, and waste products from sulphite cellulose manufacture; glycerol, glycol, glucose, tannin, gallic acid and phloroglucinol are mentioned. The compounds may in part be separated from their aqueous solutions by evaporation or by salting out.ALSO:Chromium compounds of organic compounds containing more than one hydroxyl group are obtained by heating with alkaline suspensions of chromium hydroxide the parent compounds, for example, tanning agents, degradation products of cellulose, and waste products from sulphite cellulose manufacture; tannin and gallic acid are mentioned. The compounds may in part be separated from their aqueous solutions by evaporation or by salting out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB851621A GB186635A (en) | 1921-03-18 | 1921-03-18 | Manufacture of chromium compounds of azo-dyestuffs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB851621A GB186635A (en) | 1921-03-18 | 1921-03-18 | Manufacture of chromium compounds of azo-dyestuffs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB186635A true GB186635A (en) | 1922-09-18 |
Family
ID=9853931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB851621A Expired GB186635A (en) | 1921-03-18 | 1921-03-18 | Manufacture of chromium compounds of azo-dyestuffs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB186635A (en) |
-
1921
- 1921-03-18 GB GB851621A patent/GB186635A/en not_active Expired
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