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Ethylene tetramerization catalyst composition and application thereof

A technology of ethylene tetramerization and composition, which is applied in the field of ethylene tetramerization catalyst composition containing double phosphorus ligands, can solve the problems of poor reaction initiation repeatability, harsh process requirements, high production cost and other problems in the reaction process, and achieve rapid reaction initiation , high reactivity, selectivity improvement effect

Active Publication Date: 2017-10-24
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 and oxygen are 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 reaction process

Method used

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  • Ethylene tetramerization catalyst composition and application thereof
  • Ethylene tetramerization catalyst composition and application thereof
  • Ethylene tetramerization catalyst composition and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A 300mL stainless steel polymerization kettle is used. Heat the autoclave to 80°C, evacuate and replace with nitrogen several times, then fill with ethylene once, and drop to the set temperature. At 40°C, 1 μmol of bisphosphine ligands (wherein R 1 , R 2 , R 3 and R 4 Both are phenyl, R 5 is methyl), 1 μmol chromium trichloride, quantitative cocatalyst triethylaluminum, tert-butyl hydroperoxide and organic solvent methylcyclohexane, the total volume of the mixed solution is 100mL, calculated by the weight of the organic solvent As a standard, the weight content of tert-butyl hydroperoxide is 25 ppm, and the molar ratio of aluminum compound to chromium compound is 300. Control the reaction pressure to 4.0MPa, feed ethylene to carry out ethylene tetramerization reaction. After reacting for 0.5 hour, the temperature of 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...

Embodiment 2

[0038] With embodiment 1, difference is that the weight content of tert-butyl hydroperoxide is 150ppm. See Table 1 for the data.

Embodiment 3

[0040] With embodiment 1, difference is that the weight content of tert-butyl hydroperoxide is 250ppm. See Table 1 for the data.

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Abstract

The invention relates to an ethylene tetramerization catalyst composition which comprises diphosphorus ligand shown in formula I, a transition metal compound, an aluminum-containing promoter and tert-butyl hydroperoxide. The invention further provides an ethylene tetramerization method. The catalyst composition provided by the invention is applied to ethylene tetramerization, is high in reaction activity, is capable of producing 1-octylene with high selectivity, and the selectivity of 1-octylene is 74% or higher.

Description

technical field [0001] The invention relates to the field of ethylene oligomerization, in particular to an ethylene tetramerization catalyst composition containing a double phosphorus ligand. 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] The traditional 1-octene production method is the ethylene oligomerization method. The ethylene oligomerization technology...

Claims

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Application Information

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IPC IPC(8): B01J31/24C07C2/36C07C11/02
CPCB01J31/24B01J2231/20B01J2531/62C07C2/36C07C2531/24C07C11/02
Inventor 吴红飞郑明芳刘珺韩春卉王霄青栗同林
Owner CHINA PETROLEUM & CHEM CORP
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