http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-968875-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_445a797690bdb3709f7c1a0a64853ba2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08C2-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F136-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08C2-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08C2-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08C2-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F136-08 |
| filingDate | 1961-02-09^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_967ef6b9b8ad785f855f78e6b51ce49a |
| publicationDate | 1964-09-02^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-968875-A |
| titleOfInvention | Improvements in or relating to the recovery of polymers |
| abstract | Trans-polyisoprene is separated from a polymerizate by treating it in the presence of oxygen with a water-soluble organic liquid hydroxylic compound in an amount insufficient to precipitate trans-polyisoprene, adding water to the mix, and separating the phase containing the polyisoprene from the aqueous phase. The polymerizate containing trans-polyisoprene is made by contacting isoprene in the presence of a hydrocarbon solvent or diluent, with a catalyst formed from a compound of a transition metal compound and an organometallic compound. Trans-polyisoprene may be recovered from the non-aqueous phase by cooling to precipitate the polymer, and filtration. Prior to precipitation of the polymer the non-aqueous phase may be further treated to remove catalyst residues e.g. with a chelating agent such as ethylene diamine tetraacetic acid, or in an ion-exchange column. The hydroxylic compound is preferably a lower alcohol such as isopropanol. The preferred catalyst is TiCl3 or VCl3 with Al(C2H5)3. |
| priorityDate | 1961-02-09^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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