Alpha-olefin polymerization catalyst, preparation method thereof and alpha-olefin polymerization method

A technology of olefin polymerization and catalyst, applied in the field of α-olefin polymerization catalyst and its preparation, and α-olefin polymerization, can solve the problems of high polymerization activity, lower product viscosity and performance, and lower polymerization activity, and achieve simple preparation method, The effect of high catalytic activity and low cost

Active Publication Date: 2019-07-23
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 viscos

Method used

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  • Alpha-olefin polymerization catalyst, preparation method thereof and alpha-olefin polymerization method
  • Alpha-olefin polymerization catalyst, preparation method thereof and alpha-olefin polymerization method
  • Alpha-olefin polymerization catalyst, preparation method thereof and alpha-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 for 3 times, and 15.5g of MgCl was added to the reaction vessel. 2 and 50ml of cyclohexane; at 60°C, add 10ml of n-butanol dropwise at a speed of 3 to 4 seconds / drop to form an alcoholate with the carrier;

[0064] After the reaction is completed, reduce the temperature to 25 ° C, take 2.55 ml 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 to 4 seconds / drop under stirring. In the alcohol compound, continue stirring for 1h after the dropwise addition;

[0065] After the reaction of the supported titanium active center is completed, under the protection of an inert gas, the reaction solution is filtered out, the above-mentioned generated materials are subjected to multiple thermal washings with cyclohexane, and the w...

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 for 3 times, and 15.5g of MgCl was added to the reaction vessel. 2 and 50ml of cyclohexane; at 60°C, add 10ml of n-butanol dropwise at a speed of 3 to 4 seconds / drop to form an alcoholate with the carrier;

[0069] After the reaction, reduce the temperature to 25°C, take 3.83 ml 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 to 4 seconds / drop under stirring. In the alcohol compound, continue stirring for 1h after the dropwise addition;

[0070] After the reaction of the supported titanium active center is completed, under the protection of an inert gas, the reaction solution is filtered out, the above-mentioned generated materials are subjected to multiple thermal washings with cyclohexane, and the washed supernata...

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 for 3 times, and 15.5g of MgCl was added to the reaction vessel. 2 and 50ml of cyclohexane; at 60°C, add 10ml of n-butanol dropwise at a speed of 3 to 4 seconds / drop to form an alcoholate with the carrier;

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

[0075] After the reaction of the supported titanium active center is completed, under the protection of an inert gas, the reaction solution is filtered out, the above-mentioned generated materials are subjected to multiple thermal washings with cyclohexane, and the washed supernatant li...

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Abstract

The invention discloses a preparation method of an alpha-olefin polymerization catalyst. The preparation method comprises the following steps: S1, carrier pretreatment: alcoholizing a carrier in cyclohexane with organic alcohol to obtain a carrier alcoholate; S2, active component support: diluting an active component titanium compound by 2-4 times with cyclohexane, and dropwise adding the dilutedtitanium compound to the carrier alcoholate while stirring to obtain a main catalyst; S3, purification of the main catalyst: washing a semi-finished catalyst product with cyclohexane to obtain slurrycontaining the semi-finished catalyst product, and performing vacuum drying to obtain a purified main catalyst; S4, reduction of the main catalyst: reducing the main catalyst with a catalyst promoteras a reducing agent to obtain the finished catalyst product. The invention also discloses the catalyst prepared with the method, an alpha-olefin polymerization method using the catalyst prepared withthe preparation method.

Description

technical field [0001] The present invention relates to an alpha-olefin polymerization catalyst, a preparation method thereof, and an alpha-olefin polymerization method catalyzed by the catalyst, in particular to an alpha-olefin polymerization catalyst used as a base oil for synthesizing lubricating oil, a preparation method thereof, and a The catalyst-catalyzed polymerization method of alpha-olefins. Background technique [0002] Lubricating oil is an oily liquid or semi-solid that is coated on the surface of moving objects such as machine bearings and can play the role of lubrication, cooling, cleaning, sealing, rust prevention, buffering, etc. General lubricating oil is composed of base oil and additives. The base oil is the basis of lubricating oil, and the quality of the 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 oi...

Claims

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Application Information

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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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