| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a2fb815dee18f748ab4b453fcc2fd0fb |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2531-822
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2231-321
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-5095
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-5022
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-2404
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-4053
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-4046
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-50 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J38-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 |
| filingDate |
1982-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1982-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
GB-2097795-A |
| titleOfInvention |
Recovering triarylphosphine from poisoned rhodium catalyst systems |
| abstract |
A process for recovering reusable triarylphosphine (e.g. triphenylphosphine) from rhodium catalyst residues poisoned by the presence of alkyldiarylphosphine (e.g. n-propyldiphenylphosphine) such as are obtained as spent catalyst residues from the hydroformylation of olefins comprises subjecting the poisoned residues to evaporative separation under reduced pressure to separate a vapour comprising triarylphosphine from the rhodium, condensing the vapour and subjecting the condensed vapour to a milder evaporation process to form a concentrate and then mixing the concentrate with polar solvent and obtaining the triarylphosphine as a crystalline precipitate from the solvent. The crystalline phosphine is sufficiently free of poisons to be re-usable as a catalyst component in a hydroformylation process. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9834941-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5994587-A |
| priorityDate |
1981-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |