| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6298c4c8a9dc65a27deeadf713655d9f |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-33 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-33
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K-
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-32 |
| filingDate |
2002-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ecd387117cb4ac643df7e9f957ca6a5b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bba94556ff31113f1bb77c3943ee0fea
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b688a66bb624d74d2e508826174e1f81
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4338924fb227f4906859623295437ea
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d59d1e5b1d7a437a1e70bdefc8bd7696
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7d3f1b4d3cd0dbbddd3e58ea4fcec2de |
| publicationDate |
2004-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2499655-A1 |
| titleOfInvention |
Continuous process for the production of optically pure (s)-.beta.-hydroxy-.gamma.-butyrolactone |
| abstract |
Disclosed is a continuous process for the production of optically pure (S)- .beta.-hydroxy-.gamma.-butyrolactone having constantly maintained optical activity, consisting of hydrogenating 2-50 wt% of a substituted carboxylic acid derivative in a solvent using a fixed bed reactor filled with a preciou s metal catalyst-impregnated inorganic oxide carrier at 50-500 ~C under pressu re of 15-5,500 psig at weight-space-velocity of 0.1-10 h-1, in which a molar ratio of hydrogen to carboxylic acid derivative ranges from 2 to 10. The desired material can be produced in higher optical purity and at higher yiel d by the current process which is relatively simpler and environmentally safer than conventional processes. Additionally, increased production efficiency leads to production of the desired material on a large scale. |
| priorityDate |
2002-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |