GB189802326A - Improvements in the Manufacture and Production of Colouring Matters. - Google Patents
Improvements in the Manufacture and Production of Colouring Matters.Info
- Publication number
- GB189802326A GB189802326A GB189802326DA GB189802326A GB 189802326 A GB189802326 A GB 189802326A GB 189802326D A GB189802326D A GB 189802326DA GB 189802326 A GB189802326 A GB 189802326A
- Authority
- GB
- United Kingdom
- Prior art keywords
- leuco compounds
- compounds
- amido
- tertiary amines
- hydroxy
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
2326. Green, A. G., and LÚvy, R. Jan. 28. Dyes, artificial.-Relates to the manufacture of blue to bluish-green colouring-matters of the triphenylmethane series. In the nitro-leuco compounds obtained by condensing p-nitrobenzaldehyde o-sulphonic acid with secondary or tertiary amines or their sulphonic acids, the nitro group is according to the present invention replaced by the amido, hydroxy, alkyloxy, or chloro radicle. The amido-leuco compounds are obtained either by the reduction of the nitro-leuco compounds or by the condensation of p-amidobenzaldehyde-osulphonic acid with secondary or tertiary amines or their sulphonic acids. The hydroxy-leuco compounds are obtained by diazotizing the amidoleuco compounds and boiling with water, or by the condensation of p-hydrobenzaldehyde-o-sulphonic acid with secondary or tertiary amines or their sulphonic acids. The alkyloxy-leuco compounds are obtained by the alkylation of the corresponding hydroxy compounds. The chloro-leuco compounds may be obtained either by decomposing the diazochloride of the amido-leuco compounds with cuprous chloride or copper powder or by the condensation of p-chlorobenzaldehyde o-sulphonic acid with secondary or tertiary amines, e.g., dimethylaniline, diethylaniline, monoethyl-o-toluidine, benzylethylaniline, benzylmethylaniline, benzyl-otoluidine, or sulphonic acids of the last three bases. The oxidation of the above leuco compounds into colouring- matters may be effected by ferric chloride, potassium bichromate,manganese peroxide, potassium permanganate, or lead peroxide, but preferably by the last. These products dye wool and silk various shades of blue and bluish green, and, with the exception of those obtained from the hydroxy-leuco compounds, are fast to alkalies, p-Chloro-benzaldehyde-o-sulphonic acid is obtained by replacing the amido group in p-amidobenzalde hyde-o-sulphonic acid by chlorine by means of the diazo reaction.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB189802326T | 1898-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB189802326A true GB189802326A (en) | 1899-01-14 |
Family
ID=32356223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB189802326D Expired GB189802326A (en) | 1898-01-28 | 1898-01-28 | Improvements in the Manufacture and Production of Colouring Matters. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB189802326A (en) |
-
1898
- 1898-01-28 GB GB189802326D patent/GB189802326A/en not_active Expired
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