Catalyst composition for ethylene oligomerization and application thereof

An ethylene oligomerization and catalyst technology, applied in the field of olefin polymerization, can solve the problems of high production cost, large amount, poor oligomerization process stability and repeatability, etc., and achieve the effect of high ethylene oligomerization reaction activity and high selectivity

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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 ethylene oligomerization, so the current oligomerization reaction has very strict requirements on the reaction environment, and is usually strictly controlled in an anhydrous and oxygen-free environment, but at the same time, the reaction initiation and stability of the oligomerization process and very poor repeatability

Method used

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  • Catalyst composition for ethylene oligomerization and application thereof
  • Catalyst composition for ethylene oligomerization and application thereof
  • Catalyst composition for ethylene oligomerization and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Synthesis of 2-n-propionyl-1,10-phenanthroline chloride 2,6-diethylanilinate iron (II) complex

[0054] a. Synthesis of 2-n-propionyl-1,10-phenanthroline

[0055] 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 13.5ml of tri-n-propylaluminum (d=0.82g / ml, 70.9mmol) dropwise to the three-necked flask under stirring at -60°C, the dropwise addition is completed in about 15 minutes, and continue stirring at this temperature for 18h. Afterwards, the temperature was raised to about 30° C., and stirring was continued for 10 h. 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

[0069] Same as Example 1, the difference is that the weight content of water is 20ppm. See Table 1 for the data.

Embodiment 3

[0071] 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 ethylene oligomerization. The catalyst composition comprises chlorinated-2-n-propiono-1,10-phenanthroline amine iron (II) which is shown in a formula (I) as described in the specification and is used as a main catalyst, an aluminum-containing cocatalyst, water and an organic solvent. In the formula (I), R1 to R5 are independently selected from the group consisting of hydrogen, C1-6 alkyl groups, halogen, C1-6 alkoxy groups and a nitro group. According to the invention, the catalyst composition consisting of the complex main catalyst as shown in the formula (I), the aluminum-containing cocatalyst, water and the organic solvent is adopted for ethylene oligomerization, so high oligomerization reaction activity and high selectivity of alpha-olefin are obtained, and rapid initiation, stable operation and good repeatability of oligomerization are realized; even under the condition of a low aluminum/iron ratio, good oligomerization reaction activity is maintained, so technical biases of the skilled in the art are overcome and unexpected technical effects are obtained.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a catalyst composition used in ethylene oligomerization process. The present invention also relates to the use of the catalyst composition described above. 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., 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C07C2/32C07C11/02
CPCB01J2231/20B01J31/143B01J31/1815B01J2531/842B01J2531/0244
Inventor 王怀杰栗同林刘珺郑明芳张海英李维真
Owner CHINA PETROLEUM & CHEM CORP
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