http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20040064693-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-005 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C11-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C11-167 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-08 |
| filingDate | 2001-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2004-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20040064693-A |
| titleOfInvention | Method of separating/purifying conjugated diene and separation/purification apparatus |
| abstract | The process for the separation and purification of conjugated dienes includes a first column bottom by withdrawal of a hydrocarbon mixture containing conjugated dienes in the presence of a polymerization inhibitor comprising at least one nitrite and di-lower alkylhydroxylamine in the first extractive distillation column. Obtaining a product; Distilling the first bottom product in a first dissipation column to obtain a second bottom product and a distillate; Extracting the distillate in the presence of a polymerization inhibitor in a second extractive distillation column to obtain a third tower bottom product; Distilling the third bottom product in a second dissipation column to obtain a fourth bottom product; Recovering the second bottom product and the fourth bottom product and feeding them to the first extractive distillation column and / or the second extractive distillation column; Measuring the concentration of polymerization inhibitor contained in the second bottom product and / or the fourth bottom product; And controlling the polymerization inhibitor concentration contained in the second bottom product and / or the fourth bottom product by varying the supply of polymerization inhibitor to the first and / or second extraction distillation column according to the measured concentration of the polymerization inhibitor. Adjustment steps are included. According to this method, the production of the rubber substance in the apparatus can be efficiently and stably suppressed, and no excessive polymerization inhibitor remains in the conjugated diene. |
| priorityDate | 2001-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 131.