A kind of method of ethylene polymerization and polyethylene

A technology of ethylene polymerization and polymerization reaction, applied in the field of polyethylene, which can solve the problems of low ethylene polymerization activity, poor thermal and hydrothermal stability, and pore wall collapse, and achieve high catalytic activity, stable mesoporous structure, and not easy to break Effect

Active Publication Date: 2020-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason for the low ethylene polymerization activity of the mesoporous material MCM-41 after loading the catalyst is that the thermal and hydrothermal stability of the pore wall structure of MCM-41 is poor, and the pore wall partially collapses during the loading process, which affects the loading. effect, so that it affects the catalytic activity

Method used

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  • A kind of method of ethylene polymerization and polyethylene
  • A kind of method of ethylene polymerization and polyethylene
  • A kind of method of ethylene polymerization and polyethylene

Examples

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preparation example Construction

[0025] In a preferred case, the preparation method of the catalyst may include: in the presence of an inert gas, impregnating the carrier in a mother liquor containing magnesium salt and / or titanium salt, and then successively filtering and drying; wherein, the carrier The spherical double mesoporous structure composite material provided by the present invention.

[0026] According to the present invention, the impregnating conditions may include: a temperature of 25-100° C., and a time of 0.1-5 hours; preferably, the impregnating conditions include: a temperature of 40-60° C., and a time of 1-3 hours.

[0027] In the present invention, the amount of the magnesium salt and the titanium salt is not particularly limited, and preferably, the amount of the carrier, the magnesium salt, and the titanium salt is such that in the prepared supported polyethylene catalyst, the Based on the total weight of the catalyst, the content of the carrier is 90-99% by weight, and the sum of the con...

Embodiment 1

[0094] This embodiment is used to illustrate the ethylene polymerization method provided by the present invention.

[0095] (1) Preparation of spherical double mesoporous structure composites

[0096] Add 1g (0.00017mol) of template agent P123 and 1.69g (0.037mol) of ethanol into 28mL of acetic acid and sodium acetate buffer solution with pH = 4.4, stir at 15°C until the template agent is completely dissolved, and add 6g (0.05mol) of three Add methylpentane to the above solution, stir at 15°C for 8h, then add 2.13g (0.014mol) tetramethoxysilane to the above solution, stir at 15°C for 20h, then transfer the solution to the agate lining After crystallization in an oven at 60°C for 24 hours in a reaction kettle, filter and wash with deionized water for 4 times, and then suction filter to obtain a filter cake A1 of mesoporous molecular sieve material with a hollow spherical structure.

[0097] 1.46g (0.0001mol) template agent F108, 5.24g (0.03mol) K 2 SO 4 Stir with 60g of hydr...

Embodiment 2

[0121] This embodiment is used to illustrate the ethylene polymerization method provided by the present invention.

[0122] (1) Preparation of spherical double mesoporous structure composites

[0123] Add 1g (0.00017mol) template agent P123 and 1.4g (0.03mol) ethanol to 28mL of acetic acid and sodium acetate buffer solution with pH = 4.4, stir at 10°C until the template agent is completely dissolved, add 4.56g (0.04mol) Add trimethylpentane to the above solution, stir at 10°C for 8h, then add 1.83g (0.012mol) tetramethoxysilane to the above solution, stir at 10°C for 30h, then transfer the solution into agate In a lined reactor, after crystallization in an oven at 80°C for 20 hours, filter and wash with deionized water for 6 times, and then suction filter to obtain filter cake A2 of mesoporous molecular sieve material with a hollow spherical structure.

[0124] 1.46g (0.0001mol) template agent F108, 6.96g (0.04mol) K 2 SO 4 Stir with 60g of hydrochloric acid solution with a...

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Abstract

The invention relates to the field of ethylene polymerization, and particularly relates to an ethylene polymerization method and polyethylene produced through the method. The ethylene polymerization method includes the step of performing a polymerization reaction to ethylene under polymerization reaction conditions in the presence of a catalyst. The catalyst contains a spherical double-mesoporous composite material and magnesium and / or titanium supported on the spherical double-mesoporous composite material; the spherical double-mesoporous composite material contains a mesoporous molecular sieve material having a hollow spherical structure, a mesoporous molecular sieve material having a three-dimensional cube-cage structure, and silica gel. The invention also discloses polyethylene which is produced through the method. The supported catalyst, when being applied to the ethylene polymerization reaction, is high in catalytic activity and can be used for producing high-performance polyethylene products.

Description

technical field [0001] The invention relates to the field of polymerization reaction, in particular to a method for ethylene polymerization and polyethylene prepared by the method. Background technique [0002] Polyethylene is a polymer produced by polymerization of ethylene as a monomer. Due to its excellent low temperature resistance and good chemical stability, polyethylene is widely used in the chemical industry. In the process of preparing polyethylene, the use of polyethylene catalyst is one of the key factors affecting the yield and quality of polyethylene products. [0003] The development and application of polyethylene catalysts is another major breakthrough in the field of olefin polymerization catalysts after the traditional Ziegler-Natta catalysts, which makes the research on polyethylene catalysts enter a stage of rapid development. Because the homogeneous polyethylene catalyst requires a large amount of catalyst to achieve high activity, high production cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/02C08F4/643C08F4/02
CPCC08F110/02C08F4/643C08F4/02
Inventor 亢宇张明森周俊领吕新平徐世媛张志会
Owner CHINA PETROLEUM & CHEM CORP
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