| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c026f2169111ddf50d7e0cdd4e023f50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b59e413a9ef3a544ae86d5eba5693315
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e0bf0928b608797b70bbc2b91c7e52e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_827cb2835dce88186c45ff37916c8e26 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-54 |
| filingDate |
2011-04-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2013-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_34515243f9d9ed1f1241b29c21470740
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ffafcc665e1dd1e08695f7ac86235de
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d124caaf59cea2a17bbe4eb4f912cc62 |
| publicationDate |
2013-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-8436203-B2 |
| titleOfInvention |
Purification of carboxylic esters by extractive distillation |
| abstract |
In a process for purifying carboxylic esters such as ethyl formate, a carboxylic ester to be purified is distilled in the presence of an extractant, preferably by (a) allowing vapor of the carboxylic ester to be purified to ascend in a distillation column; (b) conveying the extractant in countercurrent to the vapor in an extractive distillation column; (c) taking off pure carboxylic ester above the extractive distillation zone. The extractant is, for example, selected from among diols, polyols, open-chain or cyclic amides. |
| priorityDate |
2010-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |