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Process for preparing catalyst solid component of olefin polymerization

A solid component and olefin polymerization technology, which is applied in the field of preparation of Ziegler-Natta type high-efficiency catalyst solid components, can solve the problems of olefin polymerization activity to be improved, and achieve the effect of simplifying the preparation and improving the activity

Active Publication Date: 2008-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carrier can directly support titanium compounds to obtain solid catalyst components without dealcoholization treatment, but its olefin polymerization activity still needs to be improved

Method used

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  • Process for preparing catalyst solid component of olefin polymerization

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Get 1.0 g (10.5 mmol) of anhydrous magnesium chloride powder (produced by Fushun Petroleum No. 3 Plant), put it into a glass bottle with a reflux condenser and a stirring blade, add 30 milliliters of n-hexane under nitrogen protection, and heat up to 60 ° C. At a stirring speed of 300 rpm, slowly drop in 0.15 ml (0.441 mmol) of tetrabutoxytitanium [Ti(OBu) 4 ] (produced by Beijing Reagent Factory) to generate uniform solid particles and form a suspension, and continue stirring for 1.0 hour. Then 0.4 ml (4.32 mmol) of n-butanol (produced by Beijing Reagent Factory) was added. React at 60°C for 1 hour, add 1.0 ml (4.1 mmol) diphenyldimethoxysilane and 1.5 ml (13.7 mmol) TiCl 4 , react at 60°C for 2 hours, then wash with 300 milliliters of hexane in 6 times, and dry at 60°C for 1 hour to obtain a catalyst solid component A with an average particle diameter of 15 microns and 10 to 100 micron particles accounting for 90% by mass. Coupled plasma atomic emission spectrometry...

example 2

[0026] Prepare catalyst solid component B by the method for example 1, and difference is that the n-butanol that adds is 0.3 milliliters (3.24 millimoles), and the catalyst solid component B that makes is the particle that flows easily, and average particle diameter is 16 microns, 10-100 micron particles account for 93% by mass, including 5.84% by mass of titanium.

example 3

[0028] Prepare catalyst solid component C by the method for example 1, difference is the Ti(OBu) that adds 4 The prepared catalyst C is 0.1 ml (0.294 mmol), and the prepared catalyst C is a flowable particle with an average particle diameter of 17 microns, 10-100 micron particles account for 95% by mass, and 5.88% by mass of titanium is contained therein.

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Abstract

A method for preparing a solid component of an olefin polymerization catalyst, comprising suspending anhydrous magnesium chloride in an inert hydrocarbon solvent, adding a dispersant with a general formula of Ti(OR)4 at 30 to 200°C for dispersing treatment, and then using a general formula of R1OH Alcohol is activated, then adding a titanium chloride compound with the general formula Ti(OR)4-nCln, and simultaneously adding an electron donor compound without active hydrogen for reaction, then washing with an inert hydrocarbon solvent and drying, in the general formula , R and R1 are respectively selected from C2-C8 alkyl groups, n is an integer of 1-4, the molar ratio of the anhydrous magnesium chloride to the dispersant is 10-200, and the molar ratio of the alcohol to the anhydrous magnesium chloride is 0.05-2.5 , the molar ratio of the electron donor compound to the titanium chloride compound is 0.01-1.0. The method omits the carrier dealcoholization step, the preparation method is simple, and the activity of the obtained catalyst solid component is improved.

Description

technical field [0001] The invention relates to a method for preparing a solid component of an olefin polymerization catalyst, in particular to a method for preparing a Ziegler-Natta type high-efficiency catalyst solid component. Background technique [0002] Supported high-efficiency polyolefin catalysts are prepared by supporting transition metal compounds on solid inorganic substances such as magnesium chloride, and the nature of the support is very important. In the early days, the magnesium chloride carrier was prepared by grinding, but the disadvantage of this method is that the shape of the catalyst particles is not good, so the polymer prepared with this catalyst also has a bad particle shape, a lot of fine powder, and a low apparent density. [0003] Later, people used chemical methods to dissolve the magnesium compound in some solvents, and then let it precipitate to obtain a carrier with uniform particle distribution. For example, CN1085569A discloses a method fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/643
Inventor 荣峻峰张魏周旭华毛国芳
Owner CHINA PETROLEUM & CHEM CORP