http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2345990-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4f6a94f963913eefc017aadcf7dbf06a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 |
| filingDate | 1999-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2007-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e21cdcb9511d5289c871c9ae9fb163c5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb031c74a429c396b5f094452e233219 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b263683d75aa6bddb65b7a0ce304cb59 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_96aa2981bdb18d0a0e0260310df661b6 |
| publicationDate | 2007-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2345990-C |
| titleOfInvention | Process for the preparation of ethyl acetate |
| abstract | Ethanol is dehydrogenated in the presence of hydrogen over a dehydrogenation catalyst, for example, a copper on silica catalyst. The liquefiable products present in the resulting intermediate reaction product mixture are selectively hydrogenated over a suitable catalyst, such as 5% ruthenium on carbon, so as selectively to hydrogenate reactive carbonyl-containing by-products to the corresponding alcohols. Butan-2-one and n-butyraldehyde, which would otherwise cause difficulties in purification of the ethyl acetate product, due to the proximity of their boiling points to that of ethyl acetate, are thereby hydrogenated to 2-butanol and n-butanol respectively. A two stage distillation procedure is then used to purify the selectively hydrogenated product. The first distillation zone is typically operated at less than about 4 bar (4 .times. 10 5 Pa) absolute, while the second distillation zone is typically operated at a pressure of from about 4 bar (4 .times. 10 5 Pa) absolute to about 25 bar (2.5 .times. 10 6 Pa). A first distillate of ethyl acetate, ethanol and water produced in the first distillation zone is redistilled in the second distillation zone, thereby producing a bottom product comprising, typically, from about 99.8 mol % to about 99.95 mol % ethyl acetate and an overhead second distillate, which has a different composition from that produced in the firs t distillation zone and which is returned to the first distillation zone, preferably at a point above the feed point for the liquefiable product s of the selectively hydrogenated reaction product mixture. |
| priorityDate | 1998-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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