A kind of catalyst composition for ethylene oligomerization
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A technology of ethylene oligomerization and catalyst, which is applied in the direction of hydrocarbons, hydrocarbons, physical/chemical process catalysts, etc., can solve the problems of high production cost, large dosage, and poor repeatability caused by oligomerization reaction process, and achieve high Ethylene oligomerization reactivity, high selectivity effect
Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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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
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Embodiment 1
[0039] 1. Catalyst synthesis of 2-acetyl-1,10-phenanthroline chloride 2,6-diethylanilinate iron (II) complex
[0040] a. Synthesis of 2-acetyl-1,10-phenanthroline (see the following reaction scheme)
[0041]
[0042]Put 5.1 g (28.3 mmol) of 1,10-phenanthroline into a 250 ml three-necked flask, and dissolve it with 100 ml of toluene under nitrogen protection and magnetic stirring. Slowly add 10ml of triethylaluminum (70.8mmol) dropwise to the three-necked flask under stirring at -60°C, the dropwise addition is completed in about 15 minutes, continue stirring at this temperature for 18h, then raise the temperature to about 30°C, and continue stirring 10h. Then the reaction mixture was cooled to about -30°C, 50ml of distilled water was slowly added thereto, and then heated to 30°C and stirred for 10h. Then separate the liquids, take out the organic phase, and extract the inorganic phase three times with dichloromethane, each time the consumption of dichloromethane is 20ml, a...
Embodiment 2
[0058] Same as Example 1, the difference is that the weight content of water is 20ppm. See Table 1 for the data.
Embodiment 3
[0060] Same as Example 1, the difference is that the weight content of water is 50ppm. See Table 1 for the data.
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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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