Industrial organic chemistry (important raw materials and intermediates)

Fowler, R.

doi:10.1016/0300-9467(79)80112-4

Cited by 1 publication

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“…Most of these processes generate a wide distribution of LAO carbon chain lengths from C 4 (1-butene) to C 20 (1-eicosene). 5,6 In this context, high-carbon olefins (C 8 –C 12 ) are also particularly valuable, imparting polymers with good tear resistance and other desirable properties. 7 For certain applications, high purity of α-olefins is essential because internal olefins are unreactive and thus build up during co-polymerizations.…”

Section: Introductionmentioning

confidence: 99%

Nickel complexes based on hyperbranched bispyridylamine ligands as catalyst precursors for ethylene oligomerization

Wang

Liu

Chen

et al. 2019

Journal of Chemical Research

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A series of nickel complexes containing bispyridylamine ligands is synthesized and characterized by UV-Vis, FTIR, 1H NMR, ESI-MS, and elemental analysis. All nickel complexes activated with methylaluminoxane exhibited moderate activity for ethylene oligomerization (5.30 × 104 to 2.54 × 105 g/(mol·Ni·h)), producing oligomers in the range C4–C18. The effects of reaction temperature, reaction pressure, Al/Ni molar ratio, and solvent type on the catalytic activity and product selectivity are also investigated. The resulting products are mainly low-carbon olefins (C4 and C6). Under the optimized conditions, the complex with R1 = C4H9 formed by the reaction of the corresponding ligand R1 = C4H9 with NiCl2·6H2O showed a higher catalytic activity of 2.54 × 105 g/(mol·Ni·h) compared to the complex with R2 = C6H13 and R3 = C6H11 using toluene as the solvent. Moreover, the selectivity for the C4 and C6 oligomers can reach up to 82%.

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Section: Introductionmentioning

confidence: 99%