Process for preparing catalyst solid component of olefin polymerization

A technology for polymerizing solid components and olefins, which is applied in the field of preparation of solid components of olefin polymerization catalysts, can solve problems such as the decrease of catalyst activity, and achieve the effects of simplifying the preparation method, simple preparation method and reducing preparation cost.

Active Publication Date: 2008-06-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If 2-ethylhexanol is not used to dissolve ethoxymagnesium chloride during the prepa

Method used

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  • Process for preparing catalyst solid component of olefin polymerization
  • Process for preparing catalyst solid component of olefin polymerization

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preparation example Construction

[0018] The preparation method of the magnesium-containing complex of the present invention comprises in the presence of methyl halide, making C 1 ~C 5 The alcohol and the magnesium powder are reacted at 20-200° C. at a molar ratio of 1.5-4.0:1, then saturated hydrocarbon is added, solid particles are collected and dried, and the mass ratio of the methyl halide to the magnesium powder is 10-500:1.

[0019] The preferred dichloromethane, trichloromethane or tetrachloromethane of described methyl halide, C 1 ~C 5 The alcohol is preferably methanol, ethanol, propanol, isopropanol, butanol or isobutanol, more preferably ethanol. The mass ratio of the methyl halide to the magnesium powder is preferably 10-500:1, more preferably 50-120:1.

[0020] The reaction temperature of the alcohol and magnesium powder is preferably 40-100°C, and the molar ratio of alcohol / magnesium should be controlled at 1.5-4.0:1 during the reaction. If the ratio is too low, the amount of alcohol added is ...

example 1

[0037] Prepare the magnesium complex carrier of the present invention.

[0038] Get 1.0g (41.7mmol) magnesium powder, put into there-necked flask under nitrogen protection, add 0.1gI 2 , and 60ml (80g) CH 2 Cl 2 , at 41°C (CH 2 Cl 2 Boiling point) stirring in an oil bath for 5 minutes, slowly adding 5ml (86.1mmol) of ethanol dropwise, the reaction proceeded vigorously and produced a large number of bubbles. After the dropwise addition was completed, stir at this temperature for 10 hours, and the magnesium powder reacted completely. The reaction product was cooled to 25°C to obtain a colorless transparent solution. Add 60ml of hexane to the colorless transparent solution under stirring, and white crystals will precipitate out. Continue to stir for 60 minutes, filter, and dry the solid at 25°C to obtain white powdery crystals. This is carrier a, and its expression is ClMg(OC 2 h 5 )·0.63(C 2 h 5 OH).

[0039] The content of each component of carrier a is: Mg, 17.52% by...

example 2

[0041] Prepare carrier by the method for example 1, difference is to use 60ml (89g) CHCl 3 instead of CH 2 Cl 2 , and at 61°C (CHCl 3 boiling point) magnesium powder is reacted with ethanol, and the expression of the carrier b obtained is ClMg(OC 2 h 5 )·0.81(C 2 h 5 OH).

[0042] The content of each component of carrier b is: Mg, 16.67% by mass; Cl, ​​20.92% by mass; (OC 2 h 5 ), 56.40% by mass. Its melting point was determined to be 142.9°C by DSC method, and the characteristic peak of its alcoholic hydroxyl group appeared at 3400cm by infrared spectroscopy. -1 nearby.

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Abstract

The invention relates to a preparation of olefin polymerization catalyst solid constituent, and comprises the steps: magniferous composition with general formula C l Mg (OR) . n (ROH) reacts with electron donor compound and tetrahalogen titanium respectively in the presence of unreactive hydrocarbons; solid is collected, washed and dried. R in the general formula is selected from C1-C5 alkyl while n is 0.1-1.0. The method has simple preparation; the produced catalyst solid constituent is used for propylene polymerization and has relatively high activity and tacticity.

Description

technical field [0001] The invention relates to a method for preparing a solid component of an olefin polymerization catalyst, specifically, a method for preparing a solid component of an olefin polymerization catalyst from a complex containing magnesium. Background technique [0002] The Ziegler-Natta catalyst system includes a catalyst solid component and a cocatalyst, and the catalyst solid component is composed of a titanium compound loaded on a carrier, and the carrier can be a magnesium compound or other solid compound, such as silica gel or alumina, etc., commonly used The carrier is anhydrous magnesium chloride. The cocatalyst is an organoaluminum compound. [0003] When magnesium chloride is used as a carrier to prepare high-efficiency Ziegler-Natta catalyst solid components, anhydrous magnesium chloride is generally activated and then loaded with titanium tetrachloride and other titanium-containing compounds, otherwise the activity of the prepared catalyst is not ...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/654
Inventor 荣峻峰周旭华李刚费建奇吴炳印忻海袁春海黄绪耕白文涛林伟国于鹏
Owner CHINA PETROLEUM & CHEM CORP
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