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Granular catalyst component, and preparation method and application thereof

A catalyst and particle-type technology, applied in the field of olefin polymerization catalysts, can solve problems such as unsatisfactory, unsatisfactory catalyst component production, and achieve the effect of good fluidity

Active Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] CN1258683A discloses a method for obtaining larger particles by increasing the addition of solvent toluene in the magnesium chloride dissolution system, and mentions that when the particle size is large, non-spherical particles such as rods, needles, and jujube seeds are likely to appear, and discloses In order to solve these problems, the patented method can be used to prepare particles below 25 microns, but when the particle size is made larger by adding toluene, the probability of non-spherical particles will increase greatly, so this method cannot be used to prepare 25 microns particles above
[0011] In summary, the preparation of granular catalyst components with a particle size above 50 microns by the existing technology is not satisfactory at present, and the production of catalyst components in this particle size range cannot meet the requirements.

Method used

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Examples

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preparation example Construction

[0023] In a first aspect, the present invention provides a method for preparing a granular catalyst component, wherein the method comprises:

[0024] (1) Carrying out the first contact of magnesium compound, organic epoxy compound, organic phosphorus compound and organic alcohol compound in a solvent to form a uniform solution;

[0025] (2) In the presence of a precipitation aid, react the homogeneous solution with the titanium compound at a first temperature under stirring to obtain a mixture;

[0026] (3) Mix the mixture obtained in step (2) with the ester and heat up to a second temperature under standing conditions, and react at the second temperature to obtain a solid-liquid mixture;

[0027] (4) Optionally, the solid-liquid mixture obtained in step (3) is contacted with an internal electron donor compound to obtain the particulate catalyst component.

[0028] The inventors of the present invention have found in the process of research that in the process of preparing th...

Embodiment 1

[0082] This embodiment is used to illustrate the granular catalyst component provided by the present invention and its preparation method

[0083] In the reaction kettle that has been repeatedly replaced by high-purity nitrogen, add 4.8 grams of anhydrous magnesium chloride, 145 milliliters of toluene, 4.0 milliliters of epichlorohydrin, 12.5 milliliters of tributyl phosphate, and 1.0 milliliters of butanol at a temperature of 60 ° C. After 2 hours of reaction, 1.4 g of phthalic anhydride was added, the reaction was continued for one hour, the temperature was lowered to -28°C, 56 ml of titanium tetrachloride was added dropwise, and 1.1 ml of di-n-butyl phthalate (DNBP) was added. Then, stop stirring and stand still, heat up to 0°C for 1 hour, start stirring after constant temperature for 1 hour, heat up to 30°C within 3 hours, heat up to 80°C within 0.5 hour after constant temperature, add 1.1 ml of di-n-phthalic acid Butyl ester (DNBP), constant temperature for one hour, filt...

Embodiment 2

[0085] This embodiment is used to illustrate the granular catalyst component provided by the present invention and its preparation method

[0086] Carry out the preparation of particle-type catalyst component according to the method for Example 1, difference is, after stopping to stir and stand still for 1 hour (at-28 ℃), be warming up to-5 ℃ with the rate of temperature rise of 29 ℃ / hour, constant temperature 1 hour Afterwards, stirring was started, and the temperature was raised to 25° C. at a heating rate of 9° C. / hour. After constant temperature under stirring conditions for 1 hour, the temperature was raised to 60° C. at a heating rate of 99° C. / hour. The particle size, distribution coefficient and particle shape of the obtained granular catalyst components are shown in Table 1.

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Abstract

The invention relates to the field of olefin polymerization catalyst components and discloses a granular catalyst component, and a preparation method and an application thereof. The method includes: 1) performing a first contact to a magnesium compound, an organic epoxy compound, an organic phosphorus compound and an organic alcohol compound in a solvent to obtain a homogeneous solution; 2) in thepresence of a co-precipitation agent, performing second contact on the homogeneous solution and the titanium compound in a dropwise manner to obtain a mixture; 3) performing third contact on the mixture obtained in the step 2) with ester to prepare a solid-liquid mixture; 4) optionally, contacting the solid-liquid mixture with an internal electron donor compound to prepare the granular catalyst component; wherein the temperature in the third contact is higher than that in the second contact; under a standing condition, the temperature in the second contact is increased to the temperature in the third contact.

Description

technical field [0001] The present invention relates to the field of olefin polymerization catalysts, in particular to a method for preparing a granular catalyst component, the granular catalyst component prepared by the method, and the performance of the granular catalyst component in olefin polymerization or copolymerization application. Background technique [0002] The currently disclosed methods for preparing solid titanium catalyst components for olefin polymerization are divided into two categories, one is supported catalyst components, that is, active components containing titanium are loaded on a carrier with a certain shape, and the main raw materials used for the carrier are generally It is magnesium chloride or silica gel, and its shape is mostly spherical, such as the methods disclosed in patents such as US4399054 and EP-B-65700; the other is a granular catalyst component, which is prepared into a uniform solution by magnesium chloride powder, and then precipita...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646
Inventor 郭正阳王迎雷世龙刘萃莲
Owner CHINA PETROLEUM & CHEM CORP