| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_23898e78d0061a3f4443bd6154fc13ba
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_aa444e962c92ed4843f310281c72f9d5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8718713404f862ad448bfd966c36a3ac
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6ed38dbca7b94160b48e1a0f51df45cf
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7842adadba8c8ab609c9f995063b3b76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_76cbc6d0f721fb0c9c7ac7aa3157e27d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bde2bf0cfdb5abe5c4303d0d810e12b3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4946ff9c29c67a55906c8d2a271843ea
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3d53e99486892c1098db1c62968c3094 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07B63-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-08 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B63-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-88 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-08 |
| filingDate |
2009-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bc04833c47b4b95f7f617df4eb9203cc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_56fe943ea0f1a0d6916ddd14735e72c8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c1ac2c7fac90d63796791ecfeeeefe62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cdcfa48531f33e2c340e459f63661f09
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a77eefb6ab810dfe72e968acb1e3f9e3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a473ce147f58a2cdfec2c808a44f7ced
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_653da29951ab46b5630a42d4c51dfc33
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3d27d5401b5ef955cd2cb9f2efbe2cae |
| publicationDate |
2011-05-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2011052065-A1 |
| titleOfInvention |
Process and system for purification of tetrahydrofuran |
| abstract |
A process for the purification of tetrahydrofuran from a fluid that contains tetrahydrofuran and includes at least water, dihydrofuran, and butanol as impurities, which comprises: a first distillation step of subjecting the fluid to distillation using a distillation column and thereby separating the fluid into first bottoms containing water as the main component and a first overhead containing tetrahydrofuran, dihydrofuran and butanol as the main components; a second distillation step of subjecting the first overhead to distillation using another distillation column and thereby separating the first overhead into second bottoms containing tetrahydrofuran and butanol as the main components and a second overhead containing dihydrofuran as the main component; and a third distillation step of subjecting the second bottoms to distillation using another distillation column and thereby separating the second bottoms into third bottoms containing butanol as the main component and a third overhead containing tetrahydrofuran as the main component, characterized by further comprising a refluxing step of returning a part of the second overhead to the first distillation step as a reflux liquid and discharging the remainder thereof to the outside of the system. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2016088867-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015194568-A1 |
| priorityDate |
2009-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |