Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts
1-Pentene, respectively 1-hexene, were reacted with 13 homogeneous metallocene catalysts to give linear oligomerization products, predominantly dimers, with selectivities above 90%. The product distributions of the codimerization reactions of 1-pentene with 1-hexene reflected a binomial behaviour. T...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Iran Polymer and Petrochemical Institute
2019-06-01
|
| Series: | Polyolefins Journal |
| Subjects: | |
| Online Access: | http://poj.ippi.ac.ir/article_1602_d90e1405dbf50e943054d9835877d94c.pdf |
| _version_ | 1819137878640295936 |
|---|---|
| author | Tanja Ritter Helmut Alt |
| author_facet | Tanja Ritter Helmut Alt |
| author_sort | Tanja Ritter |
| collection | DOAJ |
| description | 1-Pentene, respectively 1-hexene, were reacted with 13 homogeneous metallocene catalysts to give linear oligomerization products, predominantly dimers, with selectivities above 90%. The product distributions of the codimerization reactions of 1-pentene with 1-hexene reflected a binomial behaviour. Therefore, the ratio for dimers is 1:2:1 (C10:C11:C12) while the trimers (pentadecenes up to octadecenes) show a proportion of 1:3:3:1. By changing the ratio of the 1-pentene/1-hexene mixture, the binomial distribution switched to the side of products of the higher concentrated monomer. Even when using methyl branched olefins, the binomial product distribution could be observed. Alkenes with an internal double bond could not be dimerized under these conditions. The reactions with olefins containing a methyl group in β-position, a tert-butyl group or a neopentyl group failed. Addition of appropriate additives like tributylphosphine or aluminum powder raised both the activities and the selectivities for dimers, which means that the fraction of undecenes obtained from the codimerization reactions of 1-pentene and 1-hexene increased. |
| first_indexed | 2024-12-22T10:57:52Z |
| format | Article |
| id | doaj.art-e4691a0c0df64907af8b047e17393622 |
| institution | Directory Open Access Journal |
| issn | 2322-2212 2345-6868 |
| language | English |
| last_indexed | 2024-12-22T10:57:52Z |
| publishDate | 2019-06-01 |
| publisher | Iran Polymer and Petrochemical Institute |
| record_format | Article |
| series | Polyolefins Journal |
| spelling | doaj.art-e4691a0c0df64907af8b047e173936222022-12-21T18:28:35ZengIran Polymer and Petrochemical InstitutePolyolefins Journal2322-22122345-68682019-06-016210711610.22063/poj.2018.2258.11191602Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalystsTanja Ritter0Helmut Alt1Laboratorium für Anorganische Chemie, Universität Bayreuth, Postfach 101251, D-95440 Bayreuth, GermanyLaboratorium für Anorganische Chemie, Universität Bayreuth, Postfach 101251, D-95440 Bayreuth, Germany1-Pentene, respectively 1-hexene, were reacted with 13 homogeneous metallocene catalysts to give linear oligomerization products, predominantly dimers, with selectivities above 90%. The product distributions of the codimerization reactions of 1-pentene with 1-hexene reflected a binomial behaviour. Therefore, the ratio for dimers is 1:2:1 (C10:C11:C12) while the trimers (pentadecenes up to octadecenes) show a proportion of 1:3:3:1. By changing the ratio of the 1-pentene/1-hexene mixture, the binomial distribution switched to the side of products of the higher concentrated monomer. Even when using methyl branched olefins, the binomial product distribution could be observed. Alkenes with an internal double bond could not be dimerized under these conditions. The reactions with olefins containing a methyl group in β-position, a tert-butyl group or a neopentyl group failed. Addition of appropriate additives like tributylphosphine or aluminum powder raised both the activities and the selectivities for dimers, which means that the fraction of undecenes obtained from the codimerization reactions of 1-pentene and 1-hexene increased.http://poj.ippi.ac.ir/article_1602_d90e1405dbf50e943054d9835877d94c.pdfunbridged metallocene catalystshomogeneous olefin oligomerizationhomogeneous co-oligomerization of olefinsheterogeneous oligomerization of olefinsinfluence of additives |
| spellingShingle | Tanja Ritter Helmut Alt Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts Polyolefins Journal unbridged metallocene catalysts homogeneous olefin oligomerization homogeneous co-oligomerization of olefins heterogeneous oligomerization of olefins influence of additives |
| title | Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts |
| title_full | Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts |
| title_fullStr | Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts |
| title_full_unstemmed | Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts |
| title_short | Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts |
| title_sort | homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts |
| topic | unbridged metallocene catalysts homogeneous olefin oligomerization homogeneous co-oligomerization of olefins heterogeneous oligomerization of olefins influence of additives |
| url | http://poj.ippi.ac.ir/article_1602_d90e1405dbf50e943054d9835877d94c.pdf |
| work_keys_str_mv | AT tanjaritter homogeneousandheterogeneousoligomerizationreactionsofolefinswithunbridgedmetallocenecatalysts AT helmutalt homogeneousandheterogeneousoligomerizationreactionsofolefinswithunbridgedmetallocenecatalysts |