Catalyst carrier for olefin polymerization and its preparation method and application

A catalyst carrier and olefin polymerization technology, which is applied in the field of olefin polymerization, can solve problems such as increased operating costs, increased costs, and adverse effects of by-product recovery and treatment, and achieves the effect of saving raw material costs and saving operating costs

Active Publication Date: 2019-02-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yet adopt this method to prepare the catalyst carrier to have the unstable preparation process, easily take place carrier adhesion, and the shortcoming that the carrier molding effect is not good, therefore, need to add other surfactants in the preparation process, as stearic acid, Span, quaternary Ammonium compounds, etc.
The addition of these substances not only increases the cost, but also has an adverse effect on the recovery and treatment of by-products. In addition, in the post-treatment recovery of by-products, the recovery of ethanol and epoxy compounds is relatively difficult, which also increases operating costs.

Method used

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  • Catalyst carrier for olefin polymerization and its preparation method and application
  • Catalyst carrier for olefin polymerization and its preparation method and application
  • Catalyst carrier for olefin polymerization and its preparation method and application

Examples

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preparation example Construction

[0027] In a first aspect, the present invention provides a method for preparing a catalyst carrier for olefin polymerization, the method comprising:

[0028] 1) the magnesium halide shown in the general formula MgXY and the general formula R 1 The compound represented by OH is mixed with the oxirane compound and an optional inert liquid medium at a temperature not exceeding 35°C to obtain a mixture solution;

[0029] 2) heating the mixture solution obtained in step 1) to not lower than 40° C. under stirring;

[0030] Wherein, in the general formula MgXY, X is a halogen element, and Y is selected from halogen elements, C 1 -C 14 Alkyl, C 1 -C 14 Alkoxyl, C 6 -C 14 Aryl or C 6 -C 14 A group consisting of aryloxy groups;

[0031] In general formula R 1 OH, R 1 for C 1 -C 8 Alkyl or C 3 -C 8 Cycloalkyl;

[0032] The oxirane compound has a structure shown in formula (I):

[0033] Formula (I),

[0034] In formula (I), R 2 and R 3 each independently hydrogen, C ...

preparation example 1

[0086] This preparation example is used to prepare the catalyst carrier for olefin polymerization of the present invention.

[0087] In a 0.6L reaction kettle, add 0.08mol magnesium chloride, 1.7mol ethanol, and 0.3mol epichlorohydrin, and control the temperature at 25°C under stirring. After 1 hour of constant temperature reaction, start to heat up at a rate of 2°C / min. After reaching 60°C, maintain it for 20 minutes. Press filtration, wash the press filtration product 5 times with hexane, and vacuum dry to obtain catalyst support Z1 for olefin polymerization.

[0088] The average particle diameter (D50) of the catalyst carrier Z1 for olefin polymerization is 60 microns, and the particle size distribution ((D90-D10) / D50) is 0.9. The particle morphology observed by optical microscope is as follows figure 1 shown. It can be seen from the figure that the particle shape of the catalyst carrier Z1 for olefin polymerization is relatively regular, the surface is smooth, basically...

preparation example 2

[0093] This preparation example is used to prepare the catalyst carrier for olefin polymerization of the present invention.

[0094] In a 0.6L reaction kettle, add 0.16mol magnesium chloride, 3.4mol ethanol, and 0.6mol epichlorohydrin, and control the temperature to 30°C under stirring. After 1 hour of constant temperature reaction, start to heat up at a rate of 1°C / min. After reaching 60°C, maintain it for 20 minutes. Press filtration, wash the press filtration product with hexane for 5 times, and vacuum-dry to obtain catalyst carrier Z2 for olefin polymerization.

[0095] The average particle diameter (D50) of the catalyst carrier Z2 for olefin polymerization is 55 microns, and the particle size distribution ((D90-D10) / D50) is 0.8. The particle morphology observed by optical microscope is as follows figure 2 shown. It can be seen from the figure that the particle shape of the catalyst carrier Z2 for olefin polymerization is relatively regular, the surface is smooth, basi...

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Abstract

The invention relates to the field of olefin polymerization, and discloses a catalyst carrier for olefin polymerization and a preparation method and application of the catalyst carrier. The method includes the steps that (1) magnesium halide shown in the general formula MgXY, a compound shown in the general formula R1OH, an ethylene oxide compound and an optional inert liquid medium are mixed under the condition that the temperature is not higher than 35 DEG C, and a mixture solution is obtained; and (2) the mixture solution obtained in the step (1) is heated to the temperature not lower than 40 DEG C under the stirring condition. By means of the method, the catalyst carrier which is used for olefin polymerization and obtained through the above method is better in feature; and when a catalyst prepared through the carrier is used for olefin (in particular to propylene) polymerization, the polymerizate bulk density can be improved, and basically no anisotropic material is generated.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a method for preparing a catalyst carrier for olefin polymerization, the catalyst carrier for olefin polymerization prepared by the above method and its application. Background technique [0002] It is well known that the Ziegler-Natta catalyst supported by magnesium chloride alcoholate is significantly better than catalysts supported by other supports when it is used for the polymerization of olefins (especially propylene). Therefore, most of the catalysts currently used for olefin polymerization are prepared by loading titanium halide on magnesium chloride alcoholate. In order to obtain a spherical carrier, it can be prepared by spray drying, spray cooling, high-pressure extrusion, high-speed stirring, emulsifying machine method, and high-gravity rotating bed method. For example, WO1999044009A1 and US4399054 all disclose that magnesium chloride alcohol can be emulsified by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/02C08F4/646C08F110/06
Inventor 凌永泰夏先知刘月祥李威莅彭人琪任春红赵瑾谭扬高富堂张志会张天一马长友万真段瑞林
Owner CHINA PETROLEUM & CHEM CORP
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