http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0656337-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d648658dd620f548c24de39659a5e9e3 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-14 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C31-276 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-149 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-889 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/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C27-02 |
| filingDate | 1994-01-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1997-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ee6e655c18c2f0ad3464b2798ffcd4cc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3e862b43d3b0bb7d0fd4b3cc2fe35949 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_741693fb323193c99945c7bdce9db5da |
| publicationDate | 1997-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0656337-B1 |
| titleOfInvention | Process for the production of 1,4-cyclohexanedimethanol |
| abstract | The continuous prodn. of 1,4-cyclohexanedimethanol having a predetermined trans:cis isomer ratio comprises (a) providing a hydrogenation zone contg. a charge of granular hydrogeneration catalyst selected from Cu-contg. catalysts and Gp. VIII metal-contg. catalysts capable of catalysing the hydrogenation of esters; (b) determining a Reference Activity (RA) of the catalyst by measuring the extent of conversion of the dialkyl 1,4-cyclohexanedicarboxylate to 1,4-cyclohexanedimethanol in the passage of a reaction mixt. comprising the dialkyl 1,4-cyclohexanedicarboxylate and a H2-contg. gas through the catalyst at a preselected feed temp., feed pressure, dialkyl 1,4-cyclohexanedicarboxylate feed rate, and H2-contg. gas:dialkyl 1,4-cyclohexanedicarboxylate molar ratio; (c) determining fan Effective Residence Time (ERT) for contact of the reaction mixt. at the preselected feed temp. and feed pressure with the catalyst at the RA which produced 1,4-cyclohexanedimethanol having he desired trans:cis isomer ratio; (d) forming a vaporous feed stream comprising the dialkyl 1,4-cyclohexanedicarboxylate and a H2-contg. gas having a preselected molar ratio; (e) feeding the vaporous feed stream to the hydrogenation zone at a constant temp. of 150-350 deg. C and which is above the dew point of the feed stream and at a constant pressure of 150-2000 psia at a rate which corresponds to an Actual Residence Time (ART) of the feed stream in contact with the catalyst which yields 1,4-cyclohexanedimethanol of the desired trans:cis isomer ratio; (f) recovering a prod. stream contg. 1,4-cyclohexanedimethanol; (g) monitoring the Actual Activity (AA) of the catalyst with passage of time by measuring the extent of conversion of the dialkyl 1,4-cyclohexanedicarboxylate to 1,4-cyclohexanedimethanol under actual operating conditions of feed temp., feed pressure, dialkyl 1,4-cyclohexanedicarboxylate feed rate, and H2-contg. gas:dialkyl 1,4-cyclohexanedicarboxylate molar ratio; and (h) adjusting at least one feed condition of the vaporous feed stream to the hydrogenation zone selected from (1) the dialkyl 1,4-cyclohexanedicarboxylate feed rate, and (2) the H2-contg. gas: dialkyl 1,4-cyclohexanedicarboxylate molar ratio; while maintaining the feed stream above its dew point to provide an ART which corresponds to the ERT required to provide 1,4-cyclohexanedimethanol having the desired trans:cis ratio in accordance with the relationship (I). The dialkyl cyclohexanedicarboxylate is selected from di(1-4C alkyl) cyclohexanedicarboxylates. |
| priorityDate | 1993-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 108.