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A kind of ethylene tetramerization catalyst composition and ethylene tetramerization method

An ethylene tetramerization and composition technology, which is applied to the catalyst composition of ethylene tetramerization and the field of ethylene tetramerization, can solve the problems of high cost, cumbersome preparation steps, harsh process requirements, etc. Impact strength improvement effect

Active Publication Date: 2017-12-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technology only discloses the substituent structure of the ligand containing the P-N-P or P-C-C-P skeleton structure to a limited extent, and the ligands containing the P-N-P or P-C-C-P skeleton structure used in the above technology have complex structures, cumbersome preparation steps, and high costs
The cocatalyst aluminum alkoxide (including methylalumoxane, modified methylalumoxane, etc.) used in the above patents 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 high production costs
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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  • A kind of ethylene tetramerization catalyst composition and ethylene tetramerization method
  • A kind of ethylene tetramerization catalyst composition and ethylene tetramerization method
  • A kind of ethylene tetramerization catalyst composition and ethylene tetramerization method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A stainless steel polymerization kettle is used. The autoclave was heated to 80°C, evacuated and replaced with nitrogen several times, and then filled with ethylene for replacement and then lowered to room temperature. Then add aqueous toluene at 30 ° C, while adding 10 μmol ligand compound 1 (such as formula I, where R 1 =R 2 =R 3 =R 4 = H, R 5 =Ph) and chromium acetylacetonate and cocatalyst triethylaluminum, the total volume of the mixed solution is 100mL, wherein the mol ratio of ligand compound, chromium salt and cocatalyst is 2:1:300; take the weight of toluene as calculation basis , the weight content of water contained in the catalyst composition is 150ppm; the reaction pressure is controlled to 2.0MPa, and ethylene is introduced to carry out ethylene tetramerization reaction.

[0035] 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 coll...

Embodiment 2

[0037] With embodiment 1, difference is that water content is 5ppm. The data results are shown in Table 1.

Embodiment 3

[0039] With embodiment 1, difference is that water content is 30ppm. The data results are shown in Table 1.

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Abstract

The present invention relates to a kind of ethylene tetramerization catalyst composition, comprises catalyst ligand shown in formula I, transition metal compound, aluminum-containing cocatalyst, water and organic solvent; Wherein R1, R2, R3 and R4 are same or different, each independently selected from hydrogen, alkyl, alkoxy, cycloalkyl or halogen; the two R5 present may be the same or different, each independently selected from monocyclic or polycyclic aryl. The present invention also provides a method for ethylene tetramerization, comprising performing ethylene tetramerization in the presence of the catalyst composition for ethylene tetramerization.

Description

technical field [0001] The 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 ethylene tetramerization. Background technique [0002] As an important organic raw material and chemical intermediate, 1-octene is mainly used to produce high-quality polyethylene (PE). The linear low-density polyethylene (LLDPE) produced by the 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. , very suitable for packaging films and agricultural covering films such as greenhouses and sheds. At the same time, 1-octene is also used as an intermediate for plasticizers, fatty acids, alcohols for detergents, and lubricating oil additives. [0003] Although the value of 1-octene is well known, the art is currently not producin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/24C07C2/36C07C11/02
Inventor 吴红飞王霄青韩春卉刘珺郑明芳祁彦平栗同林
Owner CHINA PETROLEUM & CHEM CORP
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