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Main catalyst of olefin polymerization catalyst, preparation method thereof, and olefin polymerization catalyst

A main catalyst, a technology for olefin polymerization, applied in the field of efficient olefin polymerization catalyst and olefin polymerization, can solve the problems of low catalyst activity and easy adhesion to the container wall, etc., and achieve high catalyst activity, good particle shape, and low environmental pollution. Effect

Active Publication Date: 2017-03-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst activity is low, and the main catalyst particles are easy to adhere to the container wall

Method used

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  • Main catalyst of olefin polymerization catalyst, preparation method thereof, and olefin polymerization catalyst
  • Main catalyst of olefin polymerization catalyst, preparation method thereof, and olefin polymerization catalyst
  • Main catalyst of olefin polymerization catalyst, preparation method thereof, and olefin polymerization catalyst

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preparation example Construction

[0069] The preparation method of olefin polymerization catalyst provided by the present invention comprises the following steps:

[0070] 1) Dispersing the magnesium compound carrier in an inert organic solvent, adding an alcohol with 2 to 15 carbon atoms, stirring and dissolving at 90 to 150° C. for 1 to 5 hours;

[0071] 2) Cool the solution of 1) to 30°C to 80°C, add a star-shaped organic azaether compound, and react for 0.5 to 3 hours;

[0072] 3) At -25 to 30°C, contact the system obtained in step 2) with a transition metal halide, and react at -25 to 30°C for 0.5-5h, then raise the temperature of the system to 50-120°C, and react for 0.5- 5h, during the heating process, solid particles were gradually precipitated, after the reaction, the product was washed with toluene or n-hexane for 4-6 times, and unreacted substances were removed by filtration;

[0073] Vacuum drying to obtain a powdery solid procatalyst. The vacuum drying temperature is 40° C. to 90° C.; the vacuum d...

Embodiment 1

[0077] In the reactor fully replaced by nitrogen, add 1g of magnesium dichloride, 20ml of n-decane, 0.2ml of ethanol, and 6.5ml of isooctyl alcohol, stir and heat up to 120°C, and react for 2h. The temperature was lowered to 50°C, and 2.5 g of the star-shaped organic azaether compound (1) conforming to the general formula (3) was sequentially added, and the temperature was kept at 50°C for 2 hours. Lower the system to -15°C, add 30ml of titanium tetrachloride dropwise, react for 1h, then raise the temperature to 110°C for another 2h. Stop stirring, stand still, separate layers, filter, wash with hexane four times (30 ml each time), and vacuum dry at 70°C for 2 hours to obtain a spherical powder with good fluidity, non-stick container wall, uniform particle size distribution solid catalyst.

Embodiment 2

[0079] In the reactor fully replaced by nitrogen, add 1g of magnesium dichloride, 30ml of n-decane, 0.25ml of ethanol, and 7ml of iso-octanol, stir and heat up to 120°C, and react for 2h. The temperature was lowered to 60°C, and 1.5 g of the star-shaped organic azaether compound (2) conforming to the general formula (3) was sequentially added, and the temperature was kept at 60°C for 2 hours. Lower the system to -10°C, add 40ml of titanium tetrachloride dropwise, react for 1 hour, then raise the temperature to 100°C for another 3 hours. Stop stirring, stand still, separate layers, filter, wash with hexane four times (30 ml each time), and dry in vacuum at 60°C for 3 hours to obtain a spherical powder with good fluidity, uniform particle size distribution, non-stick container wall solid catalyst.

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Abstract

A main catalyst of an olefin polymerization catalyst comprises the following components: a magnesium compound carrier, transition metal halides, C2-C15 alcohols, and asteroid organic aza-ether compounds. The preparation method of the main catalyst comprises the following steps: (1) dispersing a magnesium compound carrier into an inert organic solvent, adding C2-C15 alcohols into the solvent, and stirring to dissolve the alcohols; (2) cooling the solution obtained in the step (1), and adding asteroid organic aza-ether compounds to carry out reactions; and (3) contacting the system obtained in the step (2) with transition metal halides at a temperature of -25 to 30 DEG C, after reactions, washing the reaction products by toluene or n-hexane, filtering to remove unreacted substances, and carrying out vacuum drying to obtain the main catalyst. An olefin polymerization catalyst comprises the abovementioned main catalyst and an auxiliary catalyst, which is one of trimethyl aluminum, triisobutyl aluminum, tri-n-hexyl aluminum, aluminum diethyl mono-chloride, and methyl aluminoxane (MAO).

Description

technical field [0001] The invention belongs to the fields of high-efficiency olefin polymerization catalysts and olefin polymerization, and in particular relates to a main catalyst for olefin polymerization catalysts, a preparation method thereof and an olefin polymerization catalyst. Background technique [0002] Olefin polymerization catalysts are the core of polyolefin polymerization technology. From the perspective of the development of olefin polymerization catalysts, there are two main aspects: (1) the development of polyolefin resin catalysts that can prepare special or better performance, such as metallocene catalysts (2) For the production of general-purpose polyolefin resins, on the basis of further improving catalyst performance, simplify the catalyst preparation process, reduce catalyst costs, and develop environmentally friendly technologies to improve efficiency ,Increase competitiveness. Before the 1980s, the focus of polyethylene catalyst research was on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/02C08F210/16C08F4/649C08F4/02
Inventor 张明革李殿军王硕李红明袁苑义建军孙天旭毛静门林黄启谷聂言培王静张润聪
Owner PETROCHINA CO LTD
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