http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6433193-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-33 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D315-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-33 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-08 |
| filingDate | 1999-11-08^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2002-08-13^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9f57cacbba2cd7e16398f2e8eb73bbfa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1d202cdfea641a5143360adf8248428f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2f7b75f0f523d65eb7cb6a721edd77c1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1cb09a6bc11d2c7d68141a6a1aeee88f |
| publicationDate | 2002-08-13^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6433193-B1 |
| titleOfInvention | Process to afford gamma butyrolactone and tetrahydrofuran |
| abstract | A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane. The process consists essentially of the following steps: A) converting n-butane to maleic anhydride by catalytic vapor phase oxidation; B) recovering maleic anhydride from the effluent gases of butane oxidation by selective absorption in gamma butyrolactone, forming a maleic anhydride-gamma butyrolactone mixture; C) removing water from the maleic anhydride-gamma butyrolactone mixture in a stripper under the action of a gas and/or under vacuum conditions, producing a maleic anhydride-gamma butyrolactone mixture with minimum water and maleic acid content; D) recovering gamma butyrolactone contained in the exhaust gases leaving the maleic anhydride absorber, by absorption in water; E) dehydrating the recovered gamma butyrolactone and recycling it to the maleic anhydride absorber; F) hydrogenating the dewatered maleic anhydride-gamma butyrolactone mixture, over suitable catalyst (s), under conditions favouring the formation of tetrahydrofuran and gamma butyrolactone; G) separating by distillation tetrahydrofuran, gamma butyrolactone and the by-products from the resulting hydrogenation mixture; H) recycling a gamma butyrolactone rich stream to the selective absorption of maleic anhydride. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013076747-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9040756-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2022190141-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-RE39794-E http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6620949-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7498450-B2 |
| priorityDate | 1998-11-10^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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