http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-863511-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c24684033fba97d1ad845ce453a57e3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 |
| filingDate | 1958-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1961-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-863511-A |
| titleOfInvention | Process for the manufacture of benzene-1-3-disulphonic acid |
| abstract | <FORM:0863511/IV (b)/1> Benzene-1, 3-disulphonic acid is produced by reacting benzene with sulphur trioxide in a single-stage process by carrying out the reaction at a temperature above 100 DEG C. in a mixture containing benzene-1, 3-disulphonic acid and sulphuric acid or sulphur trioxide. In order to produce as pure a product as possible, it is advantageous to carry out the reaction in the presence of a sodium salt such as sodium sulphate or the sodium salt of benzene-1, 3-disulphonic acid. In an example, a sulphonation mixture containing 35% by weight of benzene-1, 3-disulphonic acid, 65% by weight of sulphuric acid and a quantity of sodium benzene-1, 3-disulphonate amounting to about 5% by weight p (calculated on the whole reaction-mixture) is circulated, at 135 DEG -140 DEG C., through the apparatus shown by means of pump 5 at the rate of 17 litres per hour. Liquid sulphur dioxide is introduced, at the rate of 400 grams per hour, below the surface of the mixture in vessel 1; and benzene is introduced into vessel 2 at the rate of 177 grams per hour. A final product containing 92% of benzene-1, 3-disulphonic acid is withdrawn through valve 6. Specification 747,659 is referred to. |
| priorityDate | 1957-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.