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Olefin polymerization catalyst and preparation method and application thereof

An olefin polymerization and catalyst technology, applied in the field of catalysts, can solve the problems of low specific surface area of ​​catalysts, high initial catalyst activity, short catalytic life, etc., and achieve the effects of concentrated particle size distribution, long catalyst life, and low fine powder content

Active Publication Date: 2013-12-18
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the specific surface area of ​​the final catalyst is very low, at 20m 2 Below / g, this will inevitably cause more active components to be loaded on the surface of the particles, which will cause the disadvantages of high initial activity of the catalyst, severe reaction difficult to control, and short catalytic life.

Method used

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  • Olefin polymerization catalyst and preparation method and application thereof
  • Olefin polymerization catalyst and preparation method and application thereof
  • Olefin polymerization catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Add 100ml of n-heptane, 1.2g of magnesium chloride, 2.88g of ethoxymagnesium and 12.88g of n-butyl titanate into a 250ml five-necked glass reaction flask, then raise the temperature to 110°C and keep the reaction for 8 hours to obtain light yellow magnesium-titanium composite solution. The structural formula is MgCl 2 2Mg(OEt) 2 ·3Ti(OBu) 4 .

[0047] The above solution was cooled to room temperature, 1.17 g of TS-610 fumed silica and 5 ml of tetrahydrofuran were added successively, and the temperature was raised to 40° C. to react for 1 hour.

[0048] A solution formed by 9.62 g of ethylaluminum dichloride and 60 ml of n-hexane was slowly added dropwise using a constant pressure dropping funnel, and the drop was completed within 1.5 hours. Then rise to 55°C and react for 4 hours. After the reaction, keep at this temperature and wash with clean n-hexane for 3 times, then cool down to room temperature and wash with n-hexane for 2 times.

[0049] Finally, 15.07 g of...

Embodiment 2

[0054] Add 100 ml of n-heptane, 1.2 g of magnesium chloride, 1.8 g of isopropoxymagnesium and 12.88 g of n-butyl titanate into a 250 ml five-necked glass reaction flask, then raise the temperature to 100° C., and keep the reaction for 6 hours to obtain shallow Yellow magnesium-titanium composite solution. The structural formula is MgCl 2 ·Mg(i-PrO) 2 ·3Ti(OBu) 4 .

[0055] The above solution was cooled to room temperature, 2.71 g of M-5 fumed silica and 7 ml of tetrahydrofuran were added successively, and the temperature was raised to 40° C. for 3 hours to react.

[0056] A solution formed by 5.13 g of ethylaluminum dichloride and 60 ml of n-hexane was slowly added dropwise using a constant pressure dropping funnel, and the drop was completed in 1.5 hours. Then rise to 55°C and react for 4 hours. After the reaction, keep at this temperature and wash with clean n-hexane for 3 times, then cool down to room temperature and wash with n-hexane for 2 times.

[0057] Finally, 1...

Embodiment 3

[0062] Add 100 ml of n-heptane, 1.2 g of magnesium chloride, 0.72 g of ethoxymagnesium and 8.64 g of ethyl titanate into a 250 ml five-necked glass reaction flask, then raise the temperature to 110°C and keep the reaction for 4 hours to obtain a colorless Magnesium-titanium composite solution. The structural formula is MgCl 2 0.5Mg(OEt) 2 ·3Ti(OEt) 4 .

[0063]The above solution was cooled to room temperature, 0.94 g of M-5 fumed silica and 5 ml of tetrahydrofuran were added successively, and the temperature was raised to 60° C. to react for 3 hours.

[0064] The above solution was cooled to 0° C., and the solution formed by 4.69 g of sesquiethylaluminum chloride and 50 ml of n-hexane was slowly added dropwise with a constant pressure dropping funnel, and the drop was completed in 1.0 hour. Then rise to 65°C and react for 4 hours. After the reaction, keep at this temperature and wash with clean n-heptane for 3 times, then cool down to room temperature and wash with n-hept...

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Abstract

The invention relates to an olefin polymerization catalyst and a preparation method and application thereof. The olefin polymerization catalyst comprises the following main components: magnesium-titanium composite solution with the constitutional formula being MgCl2.xMg(OR<1>)2.yTi(OR2)4, fumed silica, ether compounds, an alkyl aluminium chloride compound with the constitutional formula being R<3>nAlCl(3-n), and a titanium compound with the constitutional formula being Ti(OR<4>)mCl(4-m). The catalyst can be applicable to homopolymerization and copolymerization of ethylene, the specific surface area of catalyst particles is more than or equal to 200m<2> / g, the activity of the catalyst is high, the particle size distribution of the catalyst is concentrated, and fine power is little.

Description

technical field [0001] The present invention relates to a catalyst for olefin polymerization, a preparation method and application of the catalyst in ethylene polymerization or copolymerization. Background technique [0002] Traditional polyethylene has been greatly innovated in recent years. For example, the gas-phase fluidized bed process has widely adopted the condensation operation mode, which makes the gas-phase process overcome the fatal shortcoming of poor heat removal ability, and the production capacity is doubled. Therefore, the original catalysts that used silica as a carrier could not adapt to the requirements of the new process due to the low polymerization yield. New catalysts with low silica content or direct use of active magnesium chloride as carriers continued to appear. Polymerization efficiency is doubled. However, the original silica carrier can easily realize the shape control of catalyst particles, and the catalyst has high mechanical strength, and it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/646C08F4/658C08F110/02C08F210/16
Inventor 肖明威余世炯叶晓峰
Owner CHINA PETROLEUM & CHEM CORP
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