http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1164752-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6b6fc801b5bfe5304ffa40d938db6e09 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C- |
| filingDate | 1968-03-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1969-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1164752-A |
| titleOfInvention | Process for the Production of Nitroaryl Sulphonic Acids |
| abstract | 1,164,752. Nitroaryl sulphonic acids. J. R. GEIGY A.-G. 8 March, 1968 [9 March, 1967], No. 11486/68. Heading C2C. A nitroaryl sulphonic acid is prepared by reacting a nitroaryl compound and sulphur trioxide in a ratio of 1 to 1À10 moles of sulphur trioxide per mole of nitroaryl compound by reacting in a first step at a temperature not exceeding 100‹ C. two-thirds of the nitroaryl compound with the sulphur trioxide to form the corresponding sulphonic acid anhydride and sulphonic acid monohydrate, and reacting the resultant mixture in a second step at a temperature above 100‹ C. with the remaining third of the nitroaryl compound. The process is preferably carried out in a solvent, particularly liquid sulphur dioxide. Examples are given of the preparation of (a) p-nitrotoluene sulphonic acid and 4-nitro-3-chlorobenzene sulphonic acid. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4922008-A |
| priorityDate | 1967-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.