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Method for preparing amorphous alkoxy magnesium

A magnesium oxide, amorphous technology, applied in the field of olefin polymerization, can solve the problems of insufficient particle shape, complicated operation, low capacity density, etc., and achieve the effects of perfect particle shape, easy reaction control and high bulk density.

Active Publication Date: 2014-02-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] On the other hand, if the initial addition ratio is set at 1 / 15, so that the reaction occurs under the condition of a relatively large amount of ethanol, when the viscosity rises in the final stage of the reaction, although the stirring can be carried out smoothly, the shape of the obtained particles is not round enough. , and the capacity density is also very low, and the particles satisfying the conditions cannot be obtained
In the various methods of 3-5, other raw materials are required besides Mg and ROH, and the operation is also complicated, so it can be said that it is not suitable as a method for producing the desired fine particles
In addition, considering aspects such as shape and particle diameter, it cannot be said that it is a production method that can meet the requirements.

Method used

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  • Method for preparing amorphous alkoxy magnesium
  • Method for preparing amorphous alkoxy magnesium
  • Method for preparing amorphous alkoxy magnesium

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Embodiment 10

[0052] The alkoxymagnesium particles prepared by the present invention are used to prepare solid catalyst components: in a 300ml reaction kettle repeatedly replaced by high-purity nitrogen, add 10ml of toluene and 90ml of titanium tetrachloride, cool down to -5°C, and add The suspension prepared by the magnesium alkoxide 10g and 50ml of toluene obtained in Example 1 was then slowly warmed up to 80°C, added 2ml DNBP (dibutyl phthalate), continued to heat up to 115°C, kept at a constant temperature for 2 hours, and then The liquid is filtered clean. Then add a mixture of 120ml titanium tetrachloride and 30ml toluene and raise the temperature to 110°C and stir for 1 hour. Treat like this 3 times, filter off the liquid, wash the resulting solid with 150ml hexane at 60°C for 4 times, filter off the liquid and dry , Obtaining 10.5g of solid powder was the solid catalyst component, and the titanium content was determined to be 2.55 (wt)% by spectrophotometry.

[0053] Propylene poly...

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PUM

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Abstract

The invention provides a method for preparing amorphous spherical particle alkoxy magnesium. In the method for preparing the amorphous spherical particle alkoxy magnesium, magnesium powder and mixed alcohol are used as raw materials, halogen monomer and / or inorganic halide are / is used as a halogenating agent, an organic halogen-containing compound is used as a modifier, and one or more inertial organic solvents are used as a dispersing agent; and the obtained spherical particle alkoxy magnesium has higher stacking density, more perfect particle shape and higher particle size distribution uniformity. The alkoxy magnesium is particularly suitable to be used as an olefin polymerization catalyst carrier. The obtained catalyst has high activity, higher stacking density, good particle shape and uniform distribution and is suitable for devices for producing polypropylene by gas-phase processes.

Description

technical field [0001] The invention provides a method for preparing a carrier for an olefin polymerization catalyst, spherical particles with high bulk density and excellent particle shape, and belongs to the field of olefin polymerization. Background technique [0002] With the increasing demand for polyolefins, the requirements for olefin polymerization catalysts are also increasing, and Ziegler-Natta catalysts supported by magnesium chloride are currently the most widely used. For example, the preparation methods of catalysts disclosed in patents such as CN85100997A and CN1453298A generally consist of a solid catalyst component composed of magnesium, titanium, halogen and an electron-donating organic compound. However, it is not a catalyst that can meet the requirements of various properties, such as suitable particle size and shape, uniform particle distribution, minimization of particles, high packing density, etc., as well as high catalyst activity and stereoregularit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/30C07C29/70C08F4/02C08F4/654C08F110/06
CPCY02P20/52
Inventor 谭忠徐秀东严立安宋维玮李凤奎尹珊珊于金华
Owner CHINA PETROLEUM & CHEM CORP
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