http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-191415275-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5b91dbca34285ef67abd5a3e4d2a45ef http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_75f5633d1917c0d6bff15c1049c9287d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 |
| filingDate | 1914-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1915-10-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1915-10-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-191415275-A |
| titleOfInvention | Process for the Production of 1.2-dioxybenzene-4.6-disulphonic Acid. |
| abstract | 15,275. Saccharinfabrik Akt. - Ges. vorm. Fahlberg, List, & Co., and Klages, A. June 25. Phenoldisulphonic acid; brom- and chlorphenoldisulphonic acids; pyrocatechindisulphonic acid; pyrocatechin.-Phenol is sulphonated with fuming sulphuric acid, and the resulting phenol- 4:6-disulphonic acid is treated with bromine or chlorine in acid solution, whereby a 2-brom or 2-chlor derivative is obtained. By heating these compounds in aqueous solution with caustic alkali, under pressure and to a temperature below 200‹ C., 1:2-dioxybenzene-4:6-disulphonic acid results. The aqueous solution of the sodium salt of this acid yields pyrocatechin upon heating to 220‹ C. for several hours. |
| priorityDate | 1914-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 21.