| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2529-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2529-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2529-40 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-70
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-66 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C2-66
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C2-68 |
| filingDate |
2004-10-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1e3b636924ad7c6d56e39c1e7bc4ff8d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_993fbf1345e5b152f5139f4cbc4c4de0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9bbdec265df4663fb07935aaf7302702
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0d1431179c53ebb5229e8129cfe7d818
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e3ef1d377f03d6f0460ed0b11ce1b7dd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2e23a3a1aba497de07858b949e9da1a1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_758cc002f8a08882133727384aab58d6 |
| publicationDate |
2006-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-1685087-A1 |
| titleOfInvention |
Continuous preparation of 4,4 -diisopropylbiphenyl |
| abstract |
A continuous flow process has been discovered for the highly selective isopropylation of biphenyl to 4,4'-diisopropylbiphenyl. Thus biphenyl and propene in decalin are passed through a solid zeolite catalyst bed contained in a flow reactor at moderate temperature (220°C) and pressure (10-30 atm) together with a continuous stream of nitrogen. Surprisingly, catalyst performance is improved by the continuous introduction of the nitrogen into the reactor along with the reactants and solvent. Thus, improved performance as measured by higher percent conversion to products, higher yields of diisopropylated products and lower yields of undesired triisopropylated products are observed when a diluent gas such as nitrogen is employed. The alkylation process is selective for 4,4'-diisopropylbiphenyl using a zeolite catalyst, preferably a dealuminated mordenite in which the molar ratio of SiO2 to A12O3 moieties is in a range between about 10 to 1 and about 500 to 1. |
| priorityDate |
2003-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |