Catalyst for polymerization of olefins, preparation method thereof and applications

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization, can solve the problems of difficult to obtain synthetic raw materials, complicated synthetic methods, complex structures, etc., and achieve the effect of simple preparation method, high catalytic activity, and cheap and easy-to-obtain raw materials

Active Publication Date: 2008-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Although the activity of the above-mentioned metallocene and non-metallocene catalysts is very high, they are ligand compounds with complex structures, the synthesis methods are complex, and the synthesis raw materials are not easy to obtain.

Method used

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  • Catalyst for polymerization of olefins, preparation method thereof and applications
  • Catalyst for polymerization of olefins, preparation method thereof and applications

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preparation example Construction

[0018] The preparation method of the solid catalyst component of the present invention comprises that in the presence of halide, ROH and magnesium powder are contacted and reacted at a molar ratio of 2.0 to 4.0:1, and then TiCl is added 4 Continue to react with tetrahydrofuran to form a titanium-magnesium complex solution. Concentrate the solution, lower the temperature until crystallization occurs, and remove the liquid to obtain a solid catalyst component.

[0019] In the above method, in the titanium-magnesium complex solution obtained after the reaction of ROH and magnesium powder, ethylaluminum chloride can also be added for further reaction, and then the reacted solution is concentrated, cooled to crystallization, and the liquid is removed to obtain a solid catalyst components.

[0020] The reaction temperature of each step of preparing the catalyst is preferably 20-200°C, more preferably 40-100°C.

[0021] During the above catalyst preparation process, the added TiCl ...

example 1

[0033] Preparation of the solid catalyst component described in the present invention.

[0034] A three-necked reaction flask with a mechanical stirring device was filled with N 2 fully permuted, and at N 2 Add 0.5g (20.8mmol) magnesium powder under the airflow, 0.05g of I 2 60ml (89g) of chloroform was added under stirring, and 2.4ml (42.0mmol) of ethanol was added, and the temperature was raised to 61°C for 4 hours of reaction. After cooling down to room temperature, add 1.2ml (10.81mmol) TiCl 4and 12.0ml (148.0mmol) of tetrahydrofuran (THF), heated to 61 ° C for 4 hours to form a Ti-Mg complex solution. The temperature of the solution was lowered to room temperature, concentrated to saturation, cooled to 0°C to -3°C to precipitate crystals, filtered, and the liquid was removed to obtain solid catalyst component A, which contained 2.12% by mass of Ti, 10.90% by mass of Mg, and 17.20% by mass of Cl , OC 2 h 5 26.41 mass%, THF 40.51 mass%, the compositional formula of t...

example 2

[0037] Prepare solid catalyst component by the method for example 1, difference is the ethanol that adds 2.7ml (47.2mmol) in the preparation process, the TiCl of 1.4ml (12.61mmol) 4 , 12.0ml (148.0mmol) of THF, the obtained solid catalyst component B contains Ti 2.31 mass%, Mg 9.60 mass%, Cl 18.03 mass%, OC 2 h 5 27.62 mass%, THF 41.12 mass%, the composition formula of solid catalyst component B is: TiMg 7.16 Cl 8.37 (OC 2 h 5 ) 12.53 (MgCl 2 ) 1.0 11.63(THF)

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Abstract

An olefin polymerization catalyst, containing the following ingredients:(1) solid catalyst with general formula of TiAlmMgpClq(OR)s(MgCl2)t*n(THF), wherein R is an alkyl from C2-C4, m is 0-2, p is 0-10, q is 4-10, s is 3-14, t is 0.5-1.5 and n is 2-13; and (2) auxiliary catalyst of alkyl aluminum selected from alkyl aluminum or modified alkyl aluminum. The Moore ratio of aluminium in the auxiliary catalyst to titanium in the solid catalyst is 150-1000:1. The raw materials for preparing olefin polymerization catalyst are cheap and easy to get, the preparation process is simple, and the olefin polymerization catalyst can be applied in olefin polymerization to get polyolefines in appropriate molecular weight range.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst and its preparation method and application, specifically, a catalyst composed of a Ti-Mg complex and an alkyl aluminoxane, a preparation method thereof and a method for using the catalyst in olefin polymerization. Background technique [0002] At present, the homogeneous olefin polymerization catalysts with metal complexes of large ligands as the main catalyst have mainly experienced three development stages: In the early 1950s, Natta et al. and Breslow et al. discovered the earliest metal complexes with large ligands as catalysts. The homogeneous catalyst system Cp 2 TiCl 2 / AlEt 2 Cl. Because this type of homogeneous catalyst has low activity for ethylene polymerization, short catalyst life, needs to be polymerized at low temperature, and cannot catalyze propylene polymerization, it has not attracted more attention. [0003] Since Kaminsky discovered that methylaluminoxane (MAO) could be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/645
Inventor 于鹏荣峻峰周旭华毛国芳张巍林伟国
Owner CHINA PETROLEUM & CHEM CORP
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