| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_74143a02b42b52722da005fb4d927bbc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dd8b0f61ddfe7343aa0b92fb4cfe7c6c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_faabdbceb9c89bf44567e9ffa95d36a7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4cb7c9dc225a902a7f5fb0d35a9a26e8 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C255-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F19-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-10 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-04 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-10 |
| filingDate |
2004-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dfdeafbc8bd015a89ad952657544ed5c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7402140a6b6de1f8d822d622db3e66fb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4b17351419313f8fb36249370da21b18 |
| publicationDate |
2004-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2004101497-A2 |
| titleOfInvention |
Dinitrile preparation method |
| abstract |
The invention relates to a method of preparing dinitriles, involving hydrocyanation of unsaturated nitrile compounds in the presence of a catalyst based on metallic elements in zero oxidation state and organophosphorous ligands. More specifically, the invention relates to a method of recovering a catalyst for the hydrocyanation of unsaturated nitriles into dinitriles from the hydrocyanation medium. The inventive method consists in: controlling the concentration of unsaturated nitriles in the reaction medium originating from the hydrocyanation reaction, in order to obtain a weight concentration of unsaturated nitriles of less than 20 % in said medium; and supplying the aforementioned medium in a decantation step in two phases, namely an upper and lower phase. The lower phase comprises the majority of the catalytic system, while the upper phase essentially comprises the nitriles. |
| priorityDate |
2003-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |