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A kind of α-olefin polymerization catalyst and its preparation method, α-olefin polymerization method

A technology for olefin polymerization and catalyst, which is applied in the field of α-olefin polymerization catalyst and its preparation, and the field of α-olefin polymerization, and can solve problems such as difficulty in controlling the degree of reduction of active centers, reduction in product viscosity and performance, and reduction in polymerization activity. , to achieve the effect of easy separation of catalyst and product, increase of viscosity index and low cost

Active Publication Date: 2022-03-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] Common similar Ziegler-Natta catalysts mostly use an alkylaluminum as a cocatalyst, and it is difficult to control the reduction degree of the active center well. If only triethylaluminum is used as a cocatalyst, the product viscosity index can be guaranteed, but The polymerization activity will decrease; if only diethylaluminum chloride is used as a cocatalyst, the polymerization activity will be high, and the viscosity and performance of the product will decrease

Method used

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  • A kind of α-olefin polymerization catalyst and its preparation method, α-olefin polymerization method
  • A kind of α-olefin polymerization catalyst and its preparation method, α-olefin polymerization method
  • A kind of α-olefin polymerization catalyst and its preparation method, α-olefin polymerization method

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0062] Preparation of main catalyst 1

[0063] A three-necked reaction flask equipped with a stirrer and a thermometer was replaced with high-purity nitrogen three times, and 15.5gMgCl was added to the reaction vessel 2 With 50ml of cyclohexane; at 60°C, add 10ml of n-butanol dropwise at a rate of 3-4 seconds / drop to form an alcoholate with the carrier;

[0064] After the reaction, lower the temperature to 25°C, take 2.55ml of titanium tetrachloride, add cyclohexane twice the volume ratio to make a titanium tetrachloride solution, and add it to the carrier at a rate of 3-4 seconds / drop while stirring In the alcoholate, continue to stir for 1h after the dropwise addition;

[0065] After the reaction of the supported titanium active center is completed, the reaction liquid is filtered out under the protection of an inert gas, and the above-mentioned generated material is subjected to multiple thermal washings with cyclohexane, and the washing supernatant is transferred to obtai...

preparation example 2

[0067] Preparation of main catalyst 2

[0068] A three-necked reaction flask equipped with a stirrer and a thermometer was replaced with high-purity nitrogen three times, and 15.5gMgCl was added to the reaction vessel 2 With 50ml of cyclohexane; at 60°C, add 10ml of n-butanol dropwise at a rate of 3-4 seconds / drop to form an alcoholate with the carrier;

[0069] After the reaction, lower the temperature to 25°C, take 3.83ml of titanium tetrachloride, add cyclohexane with twice the volume ratio to make a titanium tetrachloride solution, and add it to the carrier at a rate of 3-4 seconds / drop while stirring In the alcoholate, continue to stir for 1h after the dropwise addition;

[0070] After the reaction of the supported titanium active center is completed, the reaction liquid is filtered out under the protection of an inert gas, and the above-mentioned generated material is subjected to multiple thermal washings with cyclohexane, and the washing supernatant is transferred to ...

preparation example 3

[0072] Preparation of main catalyst 3

[0073] A three-necked reaction flask equipped with a stirrer and a thermometer was replaced with high-purity nitrogen three times, and 15.5gMgCl was added to the reaction vessel 2 With 50ml of cyclohexane; at 60°C, add 10ml of n-butanol dropwise at a rate of 3-4 seconds / drop to form an alcoholate with the carrier;

[0074] After the reaction, lower the temperature to 25°C, take 5.1ml of titanium tetrachloride, add cyclohexane with twice the volume ratio to make a titanium tetrachloride solution, and add it to the carrier at a rate of 3-4 seconds / drop while stirring In the alcoholate, continue to stir for 1h after the dropwise addition;

[0075] After the reaction of the supported titanium active center is completed, the reaction liquid is filtered out under the protection of an inert gas, and the above-mentioned generated material is washed with cyclohexane for several times, and the supernatant liquid is transferred to obtain a high-ef...

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Abstract

The invention discloses a preparation method of an α-olefin polymerization catalyst, comprising the following steps: S1 carrier pretreatment: alcoholizing the carrier with organic alcohol in cyclohexane to obtain a carrier alcoholate; S2 active component loading: adding The active component titanium compound is diluted 2-4 times with cyclohexane, and then added dropwise to the carrier alcoholate for stirring to obtain the main catalyst; S3 main catalyst purification: wash the semi-finished catalyst with cyclohexane to obtain a semi-finished product containing the catalyst The slurry is dried in vacuum to obtain the purified main catalyst; S4 main catalyst reduction: the co-catalyst is used as the reducing agent, and the finished catalyst is obtained after reduction. Polymerization of alpha-olefins. The invention also discloses a catalyst prepared by the above-mentioned method, and a method for polymerizing α-olefin, which uses the catalyst prepared by the above-mentioned preparation method as the catalyst.

Description

technical field [0001] The present invention relates to a kind of α-olefin polymerization catalyst and its preparation method and the polymerization method of α-olefin catalyzed by the catalyst, especially relate to a kind of α-olefin polymerization catalyst used as synthetic lubricating oil base oil and its preparation method and by The catalyst catalyzes the polymerization method of α-olefin. Background technique [0002] Lubricating oil is an oily liquid or semi-solid that is applied to the surface of moving objects such as machine bearings to lubricate, cool, clean, seal, prevent rust, and buffer. Generally, lubricating oil is composed of base oil and additives. Base oil is the foundation of lubricating oil. The quality of base oil has a great influence on the performance of the product. The source of base oil is divided into three categories: mineral lubricating oil, animal and vegetable oil and synthetic lubricating oil. At present, most of the lubricating oil base o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/14C08F4/64
CPCC08F110/14C08F4/64
Inventor 孙恩浩王海英蒋岩闫义彬曹媛媛刘通赵铁凯王力搏马克存赵仲阳王斯晗褚洪岭王桂芝徐显明王玉龙高晗徐婷婷王紫东孙维霍宏亮马立莉黄付玲林如海王亚丽韩云光王秀绘白玉洁衣学飞刘丽军
Owner PETROCHINA CO LTD
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