| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ff244048f86356cc5a9d974725b14b0b |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S203-20 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-08 |
| filingDate |
1977-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1978-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e2e4f43ce5451a51057c91c7dac5eb3c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a23cade958bd394d9a47da712349d5fe
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c915d72732b7684fd2c03ef5f8136669 |
| publicationDate |
1978-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4128457-A |
| titleOfInvention |
Process for the separation of butadiene by plural stage extractive distillation |
| abstract |
Butadiene is recovered from a hydrocarbon fraction containing it together with butenes and acetylene hydrocarbons by introducing said fraction into a first extractive distillation column, feeding aqueous acetonitrile into said column above the introduction point of said fraction and extracting a vapor stream containing butadiene below said introduction point; feeding said vapor stream into a second extractive distillation column, feeding aqueous acetonitrile above the introduction point of said vapor stream and recovering a vapor stream consisting essentially of butadiene at the top of said second column; and rectifying this last vapor stream to recover pure butadiene. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9062262-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010137664-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006241329-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10118876-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4859286-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5238540-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010025220-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9266795-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8252150-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2310474-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8551297-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4292141-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4401515-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2310474-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0149145-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012145096-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4349416-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0149145-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7557257-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4515661-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2014296589-A1 |
| priorityDate |
1977-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |