The catalytic polymerization of olefins?XIV. The polymerization of ethylene over a nickelous oxide-aluminosilicate catalyst under elevated pressure

Éidus, Ya. T.; Nefëdov, B. K.

doi:10.1016/0031-6458(62)90022-9

Cited by 1 publication

(5 citation statements)

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“…263 Doping with K 2 CO 3 inhibits activity, while NH 4 OH addition keeps the catalysts active but more unstable. 264 Amorphous aluminosilicates promoted with heteroatoms were also described by Phillips. 265 Initial catalysts contained 2.7 wt % Ni and 13 wt % Al and were activated in air at 540 °C.…”

Section: Silicas-ni/siomentioning

confidence: 94%

“…259 At such temperatures, skeletal isomerization and demethylation occur. 260 Contact time was thus reduced to a few seconds to reduce these phenomena. 261 A small grain size had positive effects, increasing the activity with between 1 and 10% nickel nitrate concentration in the impregnation solution.…”

Section: Amorphous Aluminosilicates 531mentioning

confidence: 99%

“…261 A small grain size had positive effects, increasing the activity with between 1 and 10% nickel nitrate concentration in the impregnation solution. 262 Adding minor amounts of different alkaline or metallic oxides to NiO-aluminosilicates had various influences on ethylene oligomerization activity, product selectivity and catalyst regenerability, without highlighting clear tendencies. 263 Doping with K 2 CO 3 inhibits activity, while NH 4 OH addition keeps the catalysts active but more unstable.…”

Section: Amorphous Aluminosilicates 531mentioning

confidence: 99%

“…258 After the identification of the promoting effect of aluminum in silicas for ethylene oligomerization, Eidus et al led in-depth investigations of Ni/ aluminosilicate solids at high temperatures such as 275−300 °C. 259 At such temperatures, skeletal isomerization and demethylation occur. 260 Contact time was thus reduced to a few seconds to reduce these phenomena.…”

Section: Silicas-ni/siomentioning

confidence: 99%

“…On-purpose preparation of aluminosilicates by the alumination of silica has been claimed by British Petroleum for propylene and butene oligomerization . After the identification of the promoting effect of aluminum in silicas for ethylene oligomerization, Eidus et al led in-depth investigations of Ni/aluminosilicate solids at high temperatures such as 275–300 °C . At such temperatures, skeletal isomerization and demethylation occur .…”

Section: Nickel-promoted Oxide Supports For Olefin Oligomerizationmentioning

confidence: 99%

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Nickel Catalyzed Olefin Oligomerization and Dimerization

et al. 2020

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Brought to life more than half a century ago and successfully applied for high-value petrochemical intermediates production, nickel-catalyzed olefin oligomerization is still a very dynamic topic, with many fundamental questions to address and industrial challenges to overcome. The unique and versatile reactivity of nickel enables the oligomerization of ethylene, propylene and butenes into a wide range of oligomers that are highly sought-after in numerous fields to be controlled. Interestingly, both homogeneous and heterogeneous nickel catalysts have been scrutinized and employed to do this. This rare specificity encouraged us to interlink them in this review so as to open up opportunities for further catalyst development and innovation. An in-depth understanding of the reaction mechanisms in play is essential to being able to fine-tune the selectivity and achieve efficiency in the rational design of novel catalytic systems. This review thus provides a complete overview of the subject, compiling the main fundamental/industrial milestones and remaining challenges facing homogeneous/heterogeneous approaches as well as emerging catalytic concepts, with a focus on the last 10 years.

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Section: Silicas-ni/siomentioning

confidence: 94%

Section: Amorphous Aluminosilicates 531mentioning

confidence: 99%

Section: Amorphous Aluminosilicates 531mentioning

confidence: 99%

Section: Silicas-ni/siomentioning

confidence: 99%

Section: Nickel-promoted Oxide Supports For Olefin Oligomerizationmentioning

confidence: 99%

See 3 more Smart Citations