http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2248004-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-14 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-149 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-313 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D313-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C31-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C27-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-149 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C31-27 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C31-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D313-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-31 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-80 |
| filingDate | 1997-02-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2006-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4b221c257d0c1b26fcdee67b27658e7f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_51cf76a9d590265b1308477f66730d28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_44ed9ebf38da87d4be9eea8f2b980656 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0e572465ec01c5c13cdbe4b83abbec4c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d054868463985010af7955127344a5e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9334e96ef42560136b13414a3d7d4997 |
| publicationDate | 2006-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2248004-C |
| titleOfInvention | Process for preparing 1,6 hexanediol and caprolactone |
| abstract | The invention relates to a process for preparing 1,6 hexane diol and .epsilo n.- caprolacton from a carboxylic acid mixture containing adipic acid, 6-hydroxy caproic acid and, in small quantities, 1,4 cyclohexane diols . Said mixture is obtained as a by-product of the oxidation of cyclohexane into cyclohexanone/ cyclohexanol with oxygen or gases containing oxygen, by water extraction of the reaction mixture. Said process involves esterification and hydrogenation of a partial stream into hexane diol and cyclization of 6-hydroxy caproic acid esters into caprolacton. According to this process: (a) the monocarboxylic acids and the dicarboxylic acids contained in the aqueous reaction mixture are reacted with a low-molecular alcohol to form the corresponding carboxyli c acid esters; (b) the excess alcohol, water and low-boiling agents of the resultant esterification mixture are released in a first distillation stage; (c) separating into a ester fraction substantially free of 1,4 cyclohexane diols, and a fraction containing at least the greater par t of the 1,4 cyclohexane diols is carried out from the bottom product in a second distillation stage; (d) at least part of a stream substantially containing 6-hydroxy caproic acid ester is separated from the ester fraction in a third distillation stage; (e) the ester fraction fro m (d), from which 6-hydroxy caproic acid ester was at least partially removed, is hydrogenated catalytically and 1,6 hexane diol is extracted by distilling the hydrogenated product in a known manner, and (f) the stream substantially containing 6-hydroxy caproic acid ester is heat ed to temperatures above 200 .degree.C at reduced pressure, thereby causing cyclization of 6-hydroxy caproic acid ester to form caprolacton, and pure e-caprolacton is recovered from the cyclization product by distillation. |
| priorityDate | 1996-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 120.