http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-189721825-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d3006be22f6ee9cdc47e1ac35ad47e40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_070b7e33e74a0cd33d18a1381a33bae2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_abbf5225510f35f440c3cf25694b45ac |
| filingDate | 1897-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1898-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1898-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-189721825-A |
| titleOfInvention | The Manufacture or Production of Paranitrobenzaldehyde-ortho-sulphonic Acid and Colouring Matters therefrom. |
| abstract | 21,825. Green, A. G., Wahl, A. R., and Clayton Aniline Co. Sept. 23. p-Nitrobenzaldehyde-o-sulphonic acid is produced by acting upon the dinitrodiphenylethylene disulphonic acid which is described in Specification No. 5351, A.D. 1897, with oxidizing-agents. For example, the sodium salt of the dinitrodiphenylethylene disulphonic acid in aqueous solution cooled to 0‹-5‹ C. is agitated while a solution of potassium permanganate is slowly run in. The mixture is gently warmed, the precipitated manganese dioxide is filtered off, and the filtrate is neutralized, and concentrated until the very soluble sodium salt of the new acid crystallizes out. Dyes, artificial, of the triphenylmethane series are produced by condensing p-nitro-benzaldehyde-osulphonic acid with secondary or tertiary aromatic amines, for example, with benzylethylaniline sulphonic acid, and then oxidizing the leuco compound with lead peroxide and sulphuric acid. This dye yields upon wool and silk a bluish-green shade, which is fast to alkalies. Dyes of the pyrone group are obtained if p-nitro-benzaldehyde-osulphonic acid is condensed with m-amidophenol, or m-amidocresol, or their alkylated or alphylated derivatives, or sulphonic acids thereof, and the leuco products thus obtained are dehydrated and oxidized. For example, the leuco compound obtained when m-amidophenol is used is dehydrated and oxidized simultaneously by heating it with concentrated sulphuric acid at 135‹-140‹ C., and the product dyes silk a bluish-red. |
| priorityDate | 1897-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.