http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CS-195664-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_844e5d5ee4a9dcf73ee910b9002c8a79 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_468ed3b5c96ebe86f121b51a6ec0051c |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C7-08 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C11-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-08 |
| filingDate | 1971-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4bd15ad2821aed5cc89c201c73ff2052 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92cd5ae25fcd84e2f891ef570667e6eb |
| publicationDate | 1980-02-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CS-195664-B2 |
| titleOfInvention | Process for the regeneration of isoprene from mixture containing isoprene and cyclopentadiene |
| abstract | 1340149 Isoprene SNAM PROGETTI SpA 23 Dec 1971 [29 Dec 1970] 60089/71 Heading C5E A process for the recovery of isoprene from a feed mixture constituted at least mainly by hydrocarbons having 5 carbon atoms and including isoprene, which process comprises the following steps: (a) feeding to a first extractive distillation column the feed mixture and a first solvent mixture containing water; (b) discharging from the first extractive distillation column an overhead product which includes monoolefinic and/or saturated hydrocarbons originally present in the feed; (c) feeding a bottom product from the first extractive distillation column, which bottom product includes the first solvent mixture, to a second extractive distillation column; (d) withdrawing as a sidestream from the second extractive distillation column stream containing isoprene cyclopentadiene and acetylenic compounds; (e) recovering as a bottom product of the second extractive distillation column the first solvent mixture; (f) recycling the recovered first solvent mixture to the first and second extractive distillation columns; (g) feeding to a third extractive distillation column an overhead product of the second extractive distillation column and a second solvent mixture containing water, which may be the same as or different from the first solvent mixture; (h) discharging, as an overhead product, from the third extractive distillation column a stream containing isoprene (which stream is optionally subjected to rectification so as to purify the isoprene;) (i) subjecting the bottom product of the third extractive distillation column to stripping in a stripping column so as to recover the second solvent mixture which is recycled to the third extractive distillation column; and (j) removing any dimers and oligomers formed from a lower region of the stripping column. The sidestream from (d) may be discharged or may be treated by dimerizing the cyclopentadiene therein, separating the dicyclopentadiene and separating the acetylenic compounds before being recycled to the first exhaustive distillation column. The overhead product of the stripping column may be (i) recycled to the second extractive distillation column, (ii) discharged or (iii) treated similarly to (d) and recycled to one of the extractive distillation columns. The first and second solvent mixtures may comprise water and at least one solvent selected from morpholine, N-formyl morpholine, aniline, furfural, DMF, dimethylocetamide, NMP and #-methoxypropionitrile. |
| priorityDate | 1970-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.