A kind of catalyst composition for ethylene oligomerization

Abstract

The invention discloses a catalyst composition for an ethylene oligomerization reaction technology. The catalyst composition comprises a main catalyst, chlorination 2-acetyl-1,10-phenanthroline amine iron (II) complex, an aluminiferous promoter, water and an organic solvent. According to the invention, the catalyst composition is adopted for the ethylene oligomerization reaction technology, and has very high oligomerization reaction activity; alpha-olefin is high in selectivity, and the oligomerization reaction is triggered rapidly, runs stably and is good in repeatability; even though the aluminum / ferrum ratio is low, the catalyst composition still has very good oligomerization reaction activity, so that the technical prejudice of technicians in the field is overcome, unexpected technical effects are obtained, and the catalytic effect and cost are balanced well; therefore, the cost of the oligomerization reaction is lowered greatly, and the catalyst composition is high in practicability, and has wide industrial prospect.

Description

technical field [0001] The invention relates to the field of ethylene oligomerization, in particular to a catalyst composition used in an ethylene oligomerization process. Background technique [0002] Linear α-olefins are widely used in the fields of ethylene comonomers, surfactant synthesis intermediates, plasticizer alcohols, synthetic lubricating oils and oil additives. In recent years, with the continuous development of the polyolefin industry, the worldwide demand for α-olefins has grown rapidly. At present, the vast majority of α-olefins are prepared by ethylene oligomerization. The used catalyst of ethylene oligomerization mainly contains nickel series, chromium series, zirconium series and aluminum series etc., in recent years, Brookhart group (Brookhart, the people such as M, J.Am.Chem.Soc.,1998,120,7143-7144 ; WO99 / 02472,1999), Gibson group (Gibson, V.C. et al., Chem.Commun., 1998,849-850; Chem.Eur.J., 2000,2221-2231) found that some Fe(II) and Co The tridentat...

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Problems solved by technology

However, whether methylalumoxane or modified methylalumoxane is used as a cocatalyst, the cost is too high and the dosage is too large. When it is used as a cocatalyst for ethylene oligomerization on a large scale, it will inevitably lead to production costs. high

[0004] At present, it is generally believed that water is very unfavorable to the ethylene oligomerization reaction process. CN200810111717.8 discloses a method for ethylene oligomerization, which is strictly controlled in an anhydrous and oxygen-free environment. Therefore, the current ethylene oligomerization reaction is harmful to the process. The requirements are very demanding, resulting in very poor reaction initiation and repeatability of the oligomerization process

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