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Catalyst composition for ethylene oligomerization and ethylene oligomerization method

An ethylene oligomerization and catalyst technology, applied in the directions of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problems of harsh process requirements, high cost, high production cost, etc., and achieve high oligomerization reaction activity and good repeatability. , causing rapid effects

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Catalyst composition for ethylene oligomerization and ethylene oligomerization method
  • Catalyst composition for ethylene oligomerization and ethylene oligomerization method
  • Catalyst composition for ethylene oligomerization and ethylene oligomerization method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The catalyst composition is used for the ethylene oligomerization reaction, and specifically includes the following steps: (1) The reaction system is replaced by high-temperature drying, vacuum replacement and other operations to ensure that the reaction system is free of water and oxygen; (2) Using ethylene to react to the reaction system Perform replacement to make the reaction system in an ethylene environment; (3) Add a certain amount of water-containing toluene to the reactor, add 1.37ml of triethylaluminum toluene solution (concentration of 715μmol / ml), add 2ml of 2-formyl chloride- After 1,10-phenanthroline is condensed with 2,6-diethylaniline iron(II) in toluene solution (concentration is 2.5μmol / ml), the total composition is 100ml, and the saturated water-containing The proportion of toluene and anhydrous toluene is such that the weight content of water is 5ppm based on the weight of the organic solvent, Al / Fe=196, after fully stirring, pass ethylene to start the...

Embodiment 2

[0031] Same as Example 1, except that the weight content of water is 20 ppm. The data are shown in Table 1.

Embodiment 3

[0033] Same as Example 1, except that the weight content of water is 50 ppm. The data are shown in Table 1.

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Abstract

The invention provides a catalyst composition for ethylene oligomerization, which comprises a main catalyst of chlorinated 2-formyl-1,10-phenanthroline aminal iron (II) complex as shown in formula I, an aluminium-containing cocatalyst, water, and an organic solvent. When the catalyst composition of the invention is used in ethylene oligomerization reaction process, the catalyst compoeition has very high oligomerization reactivity, the selectivity for alpha-olefins is high, and the oligomerization reaction is rapid in initiation, stable in operation, and good in repeatability; even if the aluminium / iron ratio is low, the oligomerization reactivity is very good, so the cost of the ethylene oligomerization is greatly reduced, and the catalyst composition is strong in practicality, and wide in industrialization prospects.

Description

Technical field [0001] The invention relates to the field of ethylene oligomerization, in particular to a catalyst composition used in an ethylene oligomerization reaction process. The invention also relates to an ethylene oligomerization method. Background technique [0002] Linear α-olefins are widely used in the fields of ethylene comonomers, surfactant synthesis intermediates, plasticizer alcohols, synthetic lubricants and oil additives. In recent years, with the continuous development of the polyolefin industry, the worldwide demand for α-olefins has increased rapidly. At present, most α-olefins are prepared by oligomerization of ethylene. The catalysts used in the ethylene oligomerization method are mainly nickel-based, chromium-based, zirconium-based, and aluminum-based catalysts. In recent years, the Brookhart group (Brookhart, M et al., J. Am. Chem. Soc., 1998, 120, 7143-7144 ; WO99 / 02472, 1999), Gibson group (Gibson, VC et al., Chem. Commun., 1998, 849-850; Chem. Eur....

Claims

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Application Information

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IPC IPC(8): B01J31/22C07C11/02C07C2/22
CPCY02P20/52
Inventor 郑明芳王怀杰刘珺栗同林张海英李维真
Owner CHINA PETROLEUM & CHEM CORP
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