A5054551562- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Asymmetric Hydrogenation and Catalysis
- Organometallic Complex Synthesis and Catalysis
- Advanced Chemical Physics Studies
- Zeolite Catalysis and Synthesis
- Mass Spectrometry Techniques and Applications
- Metal complexes synthesis and properties
- Synthetic Organic Chemistry Methods
- Catalysis and Oxidation Reactions
- Chemical Synthesis and Analysis
Imperial College London
2015-2020
Transnational Press London
2018
The oligomerization of ethylene produces α-olefin distributions ranging from Schulz–Flory to alternating and selective oligomer that can be mathematically analyzed characterized by recurrence relations.
The mechanism of ethylene trimerization and tetramerization with a chromium–diphosphinoamine (Cr–PNP) catalyst system has been studied combined experimental theoretical methods. Of the total product output, 1-octene, cyclopentanes, n-alkanes, higher (C10+) olefins are formed fractional (∼1.4) order response to concentration, whereas 1-hexene formation is approximately first-order in ethylene. Theoretical studies suggest involving cationic monometallic Cr(I) Cr(III) formal oxidation states. A...
Abstract Linear α-olefins or LAOs are produced by the catalytic oligomerisation of ethylene on a multimillion ton scale annually. A range is typically obtained with varying chain lengths which follow distribution. Depending catalyst, various types distributions have been identified, such as Schulz–Flory, Poisson, alternating and selective oligomerisations trimerisation to 1-hexene tetramerisation 1-octene. comprehensive mathematical analysis for all oligomer presented, showing relations...
The catalytic oligomerization of ethylene with chromium-based complexes containing bis(benzimidazolemethyl)amine (BIMA) ligands results in alternating distributions linear α-olefins (LAOs). Extremely high activities are obtained (>100 000 g mmol–1 h–1 bar–1) N-alkyl-substituted BIMA ligands, whereas bulky groups on the central nitrogen or alternative donors result much lower activities. Variations ligand backbone, as well methylation benzimidazole units, lead to reduction activity. LAO have...
The oligomerisation of ethylene with chromium-based catalysts containing asymmetric BIMA (bis(benzimidazole)methylamine) ligands produces linear alpha olefins (LAOs) that follow an alternating distribution.