| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fbd7d47b7c1ae38981f826f3c0e9a427 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-44 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11D3-34 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-32 |
| filingDate |
1990-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ffa0132e78bc94aa08fb8d3da3894257
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2a7b7008c9313c237bad95d31971d5d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d856ee2a70f2435a895337fac88e48d5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2de5f33c9245cc62a9191b01ecd112b4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_152cbb45039314c66ff71f09b6eba029
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_56331cfd48657dd28f2f5d0ed1a7d7ab |
| publicationDate |
1990-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0402978-A1 |
| titleOfInvention |
Improved process for preparing paraffin-sulfonic acids |
| abstract |
The invention is concerned with an improved process for preparing paraffin-sulfonic acids containing from 10 to 20 carbon atoms, as well as their salts. The process comprises the initial reaction of sulfo-oxidation of the concerned mixture of n-paraffins, the removal of unreacted n-paraffins from the reaction mixture, the removal of the excess of SO₂ from said mixture, and the removal from the reaction mixture of the therein formed sulfuric acid, with the simultaneous recovery of the end product. n After the removal of SO₂, to the reaction mixture hydrogen peroxide is added and the so obtained solution is submitted to one treatment selected from among the following treatments:n (a) addition of an alcohol with a number of carbon atoms comprised within the range of from 4 to 8; (b) heating up to a temperature comprised within the range of from 50 to 150°C and vacuum distillation under a residual pressure comprised within the range of from 5 to 500 mmHg until at least 60% of contained water is distilled off; (c) addition of an either aliphatic or cycloaliphatic paraffin with a number of carbon atoms comprised within the range of from 6 to 8 and distillation of the resulting azeotropic mixture at a temperature comprised within the range of from 20 to 120°C. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008135198-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008135198-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0570047-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0570056-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8426642-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5432268-A |
| priorityDate |
1989-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |