| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_630b360599ea5cf4b5bcbc0c6c0a3e2d |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-52 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D305-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-33 |
| filingDate |
1990-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_948e5727c7073762638a2e2f5b13078e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5163192e1fb8e59c374dc3b8e91cd481
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d717f6710c196945b4376085aa7b9960
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_277a75b4cc8003d4675c63646fd6a6f8 |
| publicationDate |
1991-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H03204870-A |
| titleOfInvention |
Production of lactones |
| abstract |
PURPOSE: To obtain lactones in high yield and to stabilize catalytic activity by hydrogenating a dicarboxylic acid, anhydride and/or ester thereof in the presence of ruthenium-based catalyst. n CONSTITUTION: A dicarboxylic acid, a dicarboxylic acid anhydride and/or a dicarboxylic ester is hydrogenated in the presence of a ruthenium based catalyst in a liquid phase at 50-250°C under 0.1-100kg/cm 2 G pressure to give the objective lactone. A ruthenium-based catalyst containing (A) ruthenium, (2) an organic phosphine and (3) a conjugated salt group of acid having pka smaller than 2 is used as the ruthenium-based catalyst. A catalytic solution prepared by removing the lactone from the hydrogenated reaction product is recycled for hydrogenation reaction. Concentration of free organic phosphine in a liquid phase in hydrogenation reaction zone is maintained preferably 0.01-0.1wt.%. n COPYRIGHT: (C)1991,JPO&Japio |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4648327-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7427684-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9636671-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2007510638-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7709689-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2005524704-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4913342-B2 |
| priorityDate |
1989-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |