The effect of oxygen on the Ti(OBu)4?AlR3 catalytic system in the dimerization of ethylene to 1-butene

Джабиева, З. М.; Джабиев, Т. С.; Белов, Г. П.

doi:10.1007/bf00702133

Cited by 4 publications

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“…However, this condition did not last too long because of the deactivation of the active sites. The deactivation occurred as the result of excess AlEt 3 in the reaction media and also the formation of solid by‐products …”

Section: Resultsmentioning

confidence: 99%

“…In comparison to TEA, the aluminum alkoxy derivatives are to be considerably less active in the reduction of the titanates. As a result, a decline was observed in the deactivation intensity …”

Section: Resultsmentioning

confidence: 99%

“…The reaction of TMOS or TEOS with TEA decreased the reduction ability of the activator due to the formation of AlEt 2 OMe or AlEt 2 OEt . This reduced the conversion of Ti 4+ species to Ti 3+ which were believed to be as the polymerization active centers and responsible for the formation of the solid by‐products.…”

Section: Resultsmentioning

confidence: 99%

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Alkoxysilane modification of a Ti‐based catalyst system for ethylene dimerization: A step forward in enhancing productivity and selectivity

Bigdeli

Abdouss

Abedi

2016

J of Applied Polymer Sci

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Alkoxysilanes were used as novel enhancing agents in the Ti-based catalyst for the highly selective ethylene dimerization to butene-1. The dimerization of ethylene was carried out using the homogeneous Ti(OBu) 4 /THF/TEA/alkoxysilane catalyst system, where Ti(OBu) 4 , THF (tetrahydrofuran), TEA (triethylaluminum), and alkoxysilane were used as catalyst, additive, activator, and modifier, respectively. The nature and concentration of alkoxysilanes on the dimerization rate, catalyst yield, by-products production, and selectivity to butene-1 were investigated in detail. It was found that the performance of alkoxysilanes assisted with the class of the Ti-based catalyst system, developed in this work, has been furthered by high productivity and selectivity with respect to the bare catalyst system. It proved that alkoxysilanes could play an excellent improving role in the selective ethylene dimerization process. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44615.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%