http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-991490-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b072fa30c97e2e4206596b1d43c368fe http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_13ef102659c1a496330aeae6979abc83 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2523-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2527-232 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-90 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-24 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-90 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C2-24 |
| filingDate | 1962-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1965-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-991490-A |
| titleOfInvention | Improvements in or relating to polymerisation catalysts |
| abstract | Olefines having 3 or more carbon atoms are dimerised in the presence of a catalyst comprising Na metal on an anhydrous K compound which has been prepared by mixing with the anhydrous K compound an involatile Na compound which decomposes on heating to yield metallic Na and thereafter heating the mixture at or above the required decomposition temperature. If desired the catalyst may be prepared in situ, i.e. olefines may be passed over K2CO3 and NaN3 or NaH at such a temperature as to decompose the latter. Mono-olefins are dimerised at 100-400 DEG C. and dienes at - 10 DEG to 50 DEG C. at up to 4,000 p.s.i.g. and 0.5-10 v/v/hr. The process may be effected batchwise or continuously. Specified feedstocks are propylene, isobutylene, butadiene, and isophene or mixtures of such compounds, or mixtures with ethylene. Reference is made to (1) dimerisation of propylene to 4-methyl pentene-1; (2) copolymerization of isobutene and ethylene to 2-methyl pentenes-1 and -2; (3) copolymerization of n-butenes and ethylene to 3 - methylpentenes - 1 and - 2 and n-hexenes. An example gives the following per cent composition of reaction product from propylene at 1,000 p.s.i.g. and 140 DEG C.: propylene 1.0%; 3- and 4-methylpentene-1 76.5%; cis and trans 4 - methylpentene - 2 10.8%; hexene - 1,2 - methylpentene - 1 and transhexene-3 8.2%; cis hexane-3 and trans hexene-2 2.0%; 2-methylpentene-2 and cis hexene-2 1.3%; other material 0.2%. Specification 933,253 is referred to.ALSO:Catalysts useful in dimerizing and trimerizing lower olefines are made by mixing with an anhydrous potassium compound an involatile compound of sodium which decomposes on heating to yield metallic sodium, and subsequently heating the mixture to produce metallic sodium. K2CO3 is preferred, but also mentioned are KOH, K2SiO3, K2SO4 and halides. Sodium azide and hydride are specified decomposable Na compounds. Specification 933,253 is referred to. |
| priorityDate | 1962-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.