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Ethylene oligomerization catalyst and application thereof

A technology for ethylene oligomerization and catalyst, which is applied in the direction of catalyst, catalytic reaction, carbon compound catalyst, etc., can solve the problems of high cost, large amount and high production cost, and achieve the effects of low cost, simple preparation and good activity

Active Publication Date: 2017-09-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum alkoxides (including methylalumoxane and modified methylalumoxane) as cocatalysts have problems such as high cost and large dosage. When used in large-scale ethylene trimerization reactions, it will inevitably lead to production high cost problem

Method used

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  • Ethylene oligomerization catalyst and application thereof
  • Ethylene oligomerization catalyst and application thereof
  • Ethylene oligomerization catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A stainless steel polymerization kettle is used. The autoclave was heated to 80°C, evacuated and replaced with nitrogen several times, then filled with ethylene for replacement and lowered to the reaction temperature. Add heptane at 60 DEG C then, add 10 μ mol procatalyst 1 (structure such as general formula II, wherein R 1 =R 2 =H, Ar is phenyl) and co-catalyst triethylaluminum (AlEt3), the total volume of the mixed solution is 100mL, wherein the mol ratio of chromium in the main catalyst and aluminum in the co-catalyst is 1:100, and the reaction pressure is controlled at 1MPa, Feed ethylene to carry out ethylene oligomerization reaction.

[0025] After the reaction was completed, the system was cooled to room temperature, the gas phase product was collected in a gas metering tank, and the liquid phase product was collected in an Erlenmeyer flask, and 1 mL of ethanol was added as a terminator to terminate the ethylene oligomerization reaction. Gas-liquid phase produ...

Embodiment 2

[0027] With embodiment 1, difference is that reaction pressure is 5MPa. The data results are shown in Table 1.

Embodiment 3

[0029] Same as Example 1, except that the reaction temperature is 30°C. The data results are shown in Table 1.

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Abstract

The invention relates to an ethylene oligomerization catalyst. The ethylene oligomerization catalyst comprises a main catalyst represented by general formula (I) shown in the description and an aluminum-containing cocatalyst; in the formula (I), one of A, B and D is S, the remaining two of A, B and D are independently selected from CR<1> and CR<2>; the R<1> and the R<2> are same or can be different, and are respectively selected from hydrogen, an alkyl group, a cycloalkyl group and halogen, and atoms in the alkyl group and the cycloalkyl group are optionally substituted with hetero atoms or are not substituted; and Ar is an aryl group or a substituted aryl group. The catalyst provided by the invention has the advantages of good oligomerization activity and good product distribution.

Description

technical field [0001] The invention relates to an oligomerization catalyst, in particular to the application of a thiophene oligomerization catalyst in an ethylene oligomerization reaction, and also relates to an ethylene oligomerization process. Background technique [0002] The oligomerization of olefins, mainly α-olefins, using chromium-based catalysts has been extensively studied. More precisely, many chromium-based catalysts have been developed and used for the oligomerization of olefins to produce α-olefins. Among them, the trimerization of ethylene into 1-hexene and the tetramerization of ethylene into 1-octene are of special significance. Compared with the copolymer of 1-butene, the LLDPE resin copolymerized by 1-hexene and 1-octene has significantly better tensile strength, impact strength, tear resistance and durability, especially suitable for packaging films And greenhouses, sheds and other agricultural covering films. In terms of α-olefins as comonomers, 1-h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/24C07C11/107C07C11/02C07C2/22
CPCB01J31/24B01J2231/20B01J2531/62C07C2/22C07C2531/24C07C11/107C07C11/02
Inventor 吴红飞郑明芳韩春卉王霄青栗同林刘珺
Owner CHINA PETROLEUM & CHEM CORP
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