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Catalyst composition for ethylene oligomerization

An ethylene oligomerization and catalyst technology, applied in the direction of catalysts, hydrocarbons, hydrocarbons, etc., can solve the problems of high polyolefin content and difficult to achieve continuous production of ethylene tetramerization, and achieve high selectivity and inhibition of polyethylene side effects. production, improve selectivity

Pending Publication Date: 2022-02-08
SINOCHEM QUANZHOU PETROCHEM CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to a large number of disclosed patents or reports, the existing technology still has the problem of high content of by-product polyolefins, which makes it difficult to achieve continuous production of ethylene tetramerization

Method used

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  • Catalyst composition for ethylene oligomerization
  • Catalyst composition for ethylene oligomerization
  • Catalyst composition for ethylene oligomerization

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1 Preparation of diphenylmethylene (cyclopentadiene) (9-fluorenyl) zirconium dichloride:

[0035]

[0036] The synthetic route of white compound ligand

[0037] 1) Add 2.5 g (0.015 mol) of fluorene and 50 mL of THF to a round bottom flask equipped with a sidearm, addition funnel, and magnetic stir bar. An equimolar amount of methyllithium in diethyl ether (1.4 M) to fluorene was added at room temperature within 30 minutes. The resulting dark red solution was stirred for several hours until gas evolution had completely ceased. Then, 3.4 g (0.015 mol) of 6,6-diphenylfulvene dissolved in 100 mL THF was added dropwise, and the resulting red THF solution was stirred overnight, followed by adding 30 mL of ammonium chloride saturated aqueous solution and stirring for 10 minutes. The organic layer was extracted several times with 50 ml of ether, and the combined organic phases were dried over magnesium sulfate. After removal of ether and recrystallization of th...

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Abstract

The invention provides a catalyst composition for ethylene oligomerization. The catalyst composition comprises a ligand compound, namely diphenylmethylene (cyclopentadiene) (9-fluorenyl) zirconium dichloride, a transition metal compound and an aluminum alkyl cocatalyst. The metal organic ligand dibenzylidene (cyclopentadiene) (9-fluorenyl) zirconium dichloride is used as a ligand of an ethylene tetramerization catalyst, can effectively form a bimetallic center in the catalysis process to improve the selectivity of 1-octene, and can effectively inhibit the generation of a polyethylene byproduct.

Description

technical field [0001] The invention belongs to the field of ethylene oligomerization preparation, and in particular relates to a metal organic compound ligand and its application in ethylene oligomerization. Background technique [0002] In recent years, with the widespread use of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE), 1-hexene, 1-octene and other linear α-olefin (LAO) monomers used in the synthesis of LLDPE and HDPE The consumption of olefins has also increased significantly, among which 1-hexene or 1-octene needs to be added to LLDPE to reach 8%~10%, and the addition of α-olefin to HDPE is about 2%. In addition, the alpha-olefin content in polyolefin elastomers (POE) needs to be up to 30%. Although POE has not yet been industrialized in China, a few companies have reported the results of the pilot test, and it is expected to achieve industrialization in the near future. It is predicted that the total demand for α-olefins in my coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C07F7/00C07C2/22C07C2/30C07C11/107C07C11/02
CPCB01J31/2291B01J31/143C07F7/00C07C2/30C07C2/22C07C2531/22B01J2231/20B01J2531/48B01J35/19C07C11/107C07C11/02Y02P20/52
Inventor 刘惠苗素贞罗清红薛丽丽徐人威武大庆
Owner SINOCHEM QUANZHOU PETROCHEM CO LTD
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