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A kind of ethylene oligomerization catalyst composition and application

A technology for ethylene oligomerization and composition, which is applied to catalysts, catalytic reactions, hydrocarbons, etc., can solve the problems of poor repeatability, harsh process requirements, and high production costs caused by the oligomerization reaction process, and achieves easy preparation and execution. Control, good repeatability, smooth running effect

Active Publication Date: 2020-05-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a cocatalyst for ethylene oligomerization, whether it is methylaluminoxane or modified methylaluminoxane, there are problems of high cost and excessive dosage. When used as a cocatalyst for ethylene oligomerization on a large scale, its Will inevitably lead to high production costs
[0004] At present, it is generally believed that water and oxygen are very unfavorable to the ethylene oligomerization process. The disclosed ethylene oligomerization method is strictly controlled in an anhydrous and oxygen-free environment, so the current ethylene oligomerization process is very demanding on the process. , resulting in very poor initiation and reproducibility of the oligomerization process

Method used

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  • A kind of ethylene oligomerization catalyst composition and application
  • A kind of ethylene oligomerization catalyst composition and application
  • A kind of ethylene oligomerization catalyst composition and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A stainless steel polymerization kettle is used. Heat the stainless steel polymerization kettle to 100°C, replace it with nitrogen several times after evacuating, and then fill it with ethylene until the ethylene pressure is 2 MPa and cool down to room temperature. Then add toluene at 70°C, and at the same time add 5 μmol ligand compound 1 (as shown in formula I, where R 1 = R 2 =R 3 = R 4 =CH 3 ), chromium chloride, tert-butyl hydroperoxide and triethylaluminum, the total volume of the mixed solution is 100mL, and the molar ratio of ligand, chromium chloride and triethylaluminum is 1:1:200, that is, chlorine The addition amount of chromium chloride is 5 μmol, the addition amount of triethylaluminum is 1 mmol; the Al / Cr molar ratio is 200. Based on the weight of the organic solvent, the weight content of tert-butyl hydroperoxide is 25 ppm. The reaction pressure is controlled to 2.0MPa, and ethylene is introduced to carry out ethylene oligomerization reaction.

[...

Embodiment 2

[0030] Same as Example 1, except that the content of tert-butyl hydroperoxide is 150 ppm; the results are shown in Table 1.

Embodiment 3

[0032] Same as Example 1, except that the content of tert-butyl hydroperoxide is 300ppm; the results are shown in Table 1.

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Abstract

The invention discloses an ethylene oligomerization catalyst composition which comprises a ligand compound shown in formula I, a transition metal compound, an aluminum-containing promoter, tert-butyl hydroperoxide and an organic solvent, and in the formula I, R1, R2, R3 and R4 are identical or different and are independently selected from hydrogen, alkyl, alkoxy and halogen. The invention further provides an ethylene oligomerization method. The ethylene oligomerization method comprises the following step: in the presence of the ethylene oligomerization catalyst composition, performing ethylene oligomerization reaction. The ethylene oligomerization catalyst composition disclosed by the invention has the advantages of high activity and high selectivity.

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, and correspondingly to an ethylene oligomerization method. Background technique [0002] Ethylene oligomerization is one of the most important reactions in the olefin polymerization industry. Through oligomerization, cheap small molecule olefins can be transformed into products with high added value. Ethylene oligomerization product—linear α-olefin (LAO) is an important organic chemical raw material. For example LAOC 4 -C 8 As an important organic raw material and chemical intermediate, it is mainly used in the production of high-quality polyethylene (PE). The linear low-density polyethylene (LLDPE) produced by the copolymerization of 1-hexene or 1-octene and ethylene can significantly improve the properties of PE, especially the mechanical properties, optical properties and tear strength of polyethyle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C07C2/32C07C11/08C07C11/107C07C11/02
CPCB01J31/1815B01J2231/20B01J2531/62C07C2/32C07C2531/22C07C11/08C07C11/107C07C11/02
Inventor 吴红飞韩春卉祁彦平郑明芳刘珺王霄青栗同林
Owner CHINA PETROLEUM & CHEM CORP