| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9ce023a6c13740cb05a67332f11a29f9 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-208
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-025
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C25-13 |
| filingDate |
1998-10-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b83a95b597eab65f27a649e37809609d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_482cfff5d92765e7c5e3941b1bd4220a |
| publicationDate |
1999-06-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-9926950-A1 |
| titleOfInvention |
Improved catalysis in halogen exchange reactions |
| abstract |
Impure tetra(dihydrocarbylamino)phosphonium halide is contacted with a liquid cyclic ether to dissolve the phosphonium halide and leave at least a portion of the impurities comprising at least quaternary ammonium halide or an amidophosphoxide remaining in the solid state. The solids and the liquid phase are separated from each other, an anhydrous non-solvent for the tetra(dihydrocarbylamino)phosphonium halide is mixed with the separated liquid phase to precipitate the tetra(dihydrocarbylamino)phosphonium halide, which is then separated from the liquid phase. The so-treated tetra(dihydrocarbylamino)phosphonium halide is more efficient as a catalyst for halogen exchange reactions than the original untreated tetra(dihydrocarbylamino)phosphonium halide. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107827704-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6407029-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104725183-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104725183-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1070724-A1 |
| priorityDate |
1997-11-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |