Biphasic ethylene oligomerization using bis(imino)pyridine cobalt complexes in methyl-butylimidazolium organochloroaluminate ionic liquids
✍ Scribed by Daniel Thiele; Roberto Fernando de Souza
- Book ID
- 103835349
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 200 KB
- Volume
- 340
- Category
- Article
- ISSN
- 1381-1169
No coin nor oath required. For personal study only.
✦ Synopsis
Several bis(imino)pyridine cobalt (II) complexes have been synthesized and used in ethylene oligomerization in 1-methyl-3-butylimidazolium tetrachloroaluminate (BMI•AlCl 4 ) ionic liquid activated by methylaluminoxane (MAO). The ligand substitution pattern, with halogen, methyl or trifluoromethyl units in the ortho-and para-positions of the aromatic group, has a marked effect on activity and selectivity. The cobalt catalysts evaluated in this work exhibited activities in the range 4000-15,300 h -1 and selectivities towards ethylene dimerization to butenes above 90%. These catalysts also exhibited high selectivity to 1-butene formation, up to 87%.