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Catalyst component used for olefin polymerization and preparation method thereof and catalyst used for olefin polymerization and application

A technology of olefin polymerization and catalyst, which is applied in the application field of catalyst in olefin polymerization reaction, and can solve problems such as unstable preparation process, poor carrier molding effect, and difficult control of carrier shape

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst carrier prepared by this method has the disadvantages of unstable preparation process, easy carrier adhesion, and poor carrier molding effect.
[0005] In US4861847, epoxy compounds and tributyl phosphate compounds are used to dissolve magnesium chloride to form a uniform solution, and then titanium tetrachloride is used to precipitate the carrier and carry out titanium loading. The reaction products are very complicated, and the generated by-products are difficult to handle. During the precipitation of titanium tetrachloride, some precipitation aids are also used, which makes the reaction by-products more complicated and the shape of the carrier is difficult to control
There is also a technology to add alcohol to the above dissolution system. The addition of alcohol accelerates the dissolution of tributyl phosphate and epoxy, but it can interact with titanium tetrachloride and affect the subsequent catalyst morphology and performance. have an impact
These technologies all use titanium tetrachloride to precipitate the carrier to prepare the catalyst. As mentioned above, the reaction is complicated and the waste liquid cannot be recovered. Especially after alcohol is introduced into the solution system, the shape of the carrier is more difficult to control.

Method used

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  • Catalyst component used for olefin polymerization and preparation method thereof and catalyst used for olefin polymerization and application
  • Catalyst component used for olefin polymerization and preparation method thereof and catalyst used for olefin polymerization and application
  • Catalyst component used for olefin polymerization and preparation method thereof and catalyst used for olefin polymerization and application

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Embodiment approach

[0056] According to a preferred embodiment of the present invention, the average particle diameter of the magnesium-containing carrier is 10-100 microns, and the particle size distribution is less than 1.2; preferably, the average particle diameter of the magnesium-containing carrier is 40-60 microns, the particle size distribution is less than 1.2; The diameter distribution is 0..6-1.1. In this preferred embodiment, the catalyst prepared from the magnesium-containing support is capable of higher hydrogen modulation sensitivity and yields olefin polymers with lower bulk density. In the present invention, the average particle diameter and particle size distribution of the magnesium-containing carrier can be measured by using a MasterSizer 2000 laser particle size analyzer (manufactured by Malvern Instruments Ltd).

[0057] According to the present invention, the magnesium-containing carrier is prepared by the following method, which includes: in the presence of a third inert me...

preparation example 1

[0120] This preparation example is used to illustrate the magnesium-containing carrier provided by the present invention and its preparation method.

[0121] (1) magnesium chloride alcoholate solid is prepared according to the disclosed method of embodiment 1 in CN1718595A, specifically as follows:

[0122] In a 150L reactor with a stirring device, 10kg (105mol) of magnesium chloride and 12.6kg of ethanol (273mol) were added into 60L of white oil with a viscosity of 30 centipoise (20°C) and reacted at 125°C for 2 hours. Then transfer the mixture of molten adduct and white oil to the medium of methyl silicone oil that has been preheated to 125°C. The viscosity of the methyl silicone oil is 300 centipoise (20°C), and the amount of methyl silicone oil is 120L ; Stir at a speed of 200 rpm for 10-30 minutes to obtain a mixed solution. Introduce the mixed solution into a high-gravity rotating bed for dispersion, and introduce the dispersed mixed solution into a hexane medium that h...

preparation example 2

[0126] This preparation example is used to illustrate the magnesium-containing carrier provided by the present invention and its preparation method.

[0127] According to the step (1) in the preparation example 1, the magnesium chloride alcoholate solid A2 was prepared.

[0128] In a 0.6L reactor, add 200mL of hexane, 60g (0.279mol) of magnesium chloride alcoholate solid A2, 3.9mL (0.05mol) of epichlorohydrin, react at 10°C for 6 hours, and press filter. The resulting press-filtered product was washed 5 times with hexane. Finally, the product was vacuum-dried at 50° C. for 2 hours to obtain the magnesium-containing carrier Z2.

[0129] The average particle diameter (D50) of the magnesium-containing carrier Z2 is 52 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 olefin polymerization catalyst carrier Z2 is ...

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Abstract

The present invention discloses a catalyst component used for olefin polymerization and a preparation method thereof, a catalyst used for the olefin polymerization, which contains the catalyst component, and application of the catalyst used for the olefin polymerization in the olefin polymerization. The catalyst component comprises the following reaction products: 1, a magnesium-containing carrier; 2, at least one titanium compound; and 3, at least one internal electron donor, wherein the magnesium-containing carrier is a product obtained by reaction of a compound shown as a formula (1) and an oxirane compound shown as a formula (2). When the catalyst component prepared by the carrier is used for olefin (particularly propylene) polymerization, bulk density of a polymerization product can be reduced, hydrogen regulation sensitivity of the catalyst is improved, and the polymerization product is substantially free of heterogeneous materials. The formula (1) is shown as MgXY.(ROH)p.(H2O)q, and the formula (2) is as shown in the specification.

Description

technical field [0001] The invention relates to a catalyst component for olefin polymerization, a preparation method thereof, a catalyst for olefin polymerization containing the catalyst component, and an application of the catalyst for olefin polymerization in olefin polymerization. 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 methods such as spray drying, spray cooling, high-pressure extrusion, high-speed stirring, emulsifying machine method, and high-gravity rotating bed method. After quenching the alcoholate system, a spherical alcoholate is formed. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/649C08F4/645C08F10/06
Inventor 凌永泰夏先知刘月祥李威莅高富堂赵瑾张纪贵谭扬彭人琪高平张天一张志会
Owner CHINA PETROLEUM & CHEM CORP
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