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Ethylene tetrapolymerization catalyst composition and ethylene tetrapolymerization method

A technology of ethylene tetramerization and composition, which is applied in the field of ethylene tetramerization catalyst composition and ethylene tetramerization, can solve the problems of high cost, high production cost, and harsh process requirements, and achieve high polymerization activity and rapid reaction initiation , good repeatability

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum alkoxide (including methylalumoxane, modified methylalumoxane, etc.) as a cocatalyst has the problems of high cost and excessive dosage. When it is applied to ethylene tetramerization on a large scale, it will inevitably lead to production costs. high
Moreover, in the prior art, it is generally believed that water is very unfavorable to the ethylene tetramerization reaction process, so it is necessary to strictly control the reaction in an anhydrous and oxygen-free environment during the production process
This makes all currently known ethylene tetramerization or oligomerization reactions very demanding on the process, resulting in very poor reaction initiation and repeatability of the polymerization process

Method used

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  • Ethylene tetrapolymerization catalyst composition and ethylene tetrapolymerization method
  • Ethylene tetrapolymerization catalyst composition and ethylene tetrapolymerization method
  • Ethylene tetrapolymerization catalyst composition and ethylene tetrapolymerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A 300mL stainless steel polymerization kettle was used. The autoclave was heated to 80°C, evacuated and replaced with nitrogen for several times, then filled with ethylene for replacement once, and lowered to the set temperature. Aqueous methylcyclohexane was added at 40°C, followed by 1 μmol of bisphosphine ligand (where R 1 is methyl, R 2 is ethyl, R 3 , R 4 , R 5 and R 6 All are phenyl), 1 μmol of chromium trichloride, quantitative cocatalyst triethylaluminum, the total volume of the mixed solution is 100mL, based on the weight of the organic solvent, the weight content of water is 5ppm, the moles of aluminum and chromium The ratio is 300. The reaction pressure was controlled at 4.0 MPa, and ethylene was introduced to carry out ethylene tetramerization. After 0.5 hours of reaction, 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 a conical flask, and gas chromat...

Embodiment 2

[0037] Same as Example 1, the difference is that the weight content of water is 30 ppm. See Table 1 for the data.

Embodiment 3

[0039] Same as Example 1, the difference is that the weight content of water is 50 ppm. See Table 1 for the data.

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Abstract

The present invention discloses an ethylene tetrapolymerization catalyst composition, which comprises a diphosphine ligand represented by a formula I, a transition metal compound, an aluminum-containing co-catalyst, water and an organic solvent, wherein R1 and R2 are respectively and independently selected from alkyl, cycloalkyl and aryl, and R3, R4, R5 and R6 are respectively and independently selected from aryl and cycloalkyl. The invention further discloses a method for carrying out ethylene tetrapolymerization by using the catalyst composition. The formula I is defined in the specification.

Description

technical field [0001] The present invention relates to the field of ethylene oligomerization, in particular to a catalyst composition for ethylene tetramerization. The present invention also relates to a method for the tetramerization of ethylene. Background technique [0002] As an important organic raw material and chemical intermediate, 1-octene is mainly used to produce high-quality polyethylene (PE). Linear low density polyethylene (LLDPE) produced by copolymerization of 1-octene and ethylene can significantly improve the properties of PE, especially the mechanical properties, optical properties, tear strength and impact strength of polyethylene. , It is very suitable for packaging films and agricultural cover films such as greenhouses and greenhouses. At the same time, 1-octene is also used as an intermediate for plasticizers, fatty acids, alcohols for detergents and lubricant additives. [0003] The traditional 1-octene production method is the ethylene oligomeriza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/24C07C11/02C07C2/34
Inventor 吴红飞王霄青韩春卉张立超刘珺祁彦平栗同林郑明芳
Owner CHINA PETROLEUM & CHEM CORP
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