Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of olefin polymerization catalyst carrier and its preparation method and application

A catalyst carrier and olefin polymerization technology, applied in the field of preparation of olefin polymerization catalysts, can solve problems such as complex reactions, complex reaction by-products, and difficulty in controlling the shape of the carrier

Active Publication Date: 2018-03-02
CHINA PETROLEUM & CHEM CORP +1
View PDF12 Cites 0 Cited by
  • 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
In addition, alcohol is added to the above-mentioned dissolution system, and 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. influences
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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of olefin polymerization catalyst carrier and its preparation method and application
  • A kind of olefin polymerization catalyst carrier and its preparation method and application
  • A kind of olefin polymerization catalyst carrier and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0047] According to a preferred embodiment of the present invention, the average particle diameter of the olefin polymerization catalyst carrier is 10-100 microns, and the particle size distribution is less than 1.2; preferably, the average particle diameter of the olefin polymerization catalyst carrier is 40-60 microns , the particle size distribution is 0.6-1.1. In this preferred embodiment, the catalyst prepared from the olefin polymerization catalyst support can have higher hydrogen modulation sensitivity and yield olefin polymers with lower bulk density. In the present invention, the average particle diameter and particle size distribution of the olefin polymerization catalyst carrier can be measured by using a Master Sizer 2000 laser particle size analyzer (manufactured by Malvern Instruments Ltd).

[0048] A second aspect of the present invention provides a method for the above-mentioned olefin polymerization catalyst carrier, the method comprising: in the presence of a...

preparation example 1

[0074] This preparation example is used to illustrate the olefin polymerization catalyst carrier provided by the present invention and its preparation method.

[0075] (1) magnesium chloride alcoholate solid is prepared according to the disclosed method of embodiment 1 in CN1718595A, specifically as follows:

[0076] 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 med...

preparation example 2

[0080] This preparation example is used to illustrate the olefin polymerization catalyst carrier provided by the present invention and its preparation method.

[0081] According to the step (1) in the preparation example 1, the magnesium chloride alcoholate solid A2 was prepared.

[0082] 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 olefin polymerization catalyst support Z2.

[0083] The average particle diameter (D50) of the olefin polymerization catalyst 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 polymerizatio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses an olefin polymerization catalyst carrier as well as its preparation method and application. The olefin polymerization catalyst carrier is a product obtained by reacting a compound represented by formula (1) with an oxirane compound represented by formula (2), wherein R is a C1-C12 linear or branched alkyl group ; X and Y are the same or different, each independently halogen; R'1 and R'2 are the same or different, each independently hydrogen, C1-C5 linear or branched alkyl or haloalkyl; p is 1 -5, q is 0.001-0.6. When the catalyst prepared by the carrier is used for the polymerization of olefins (especially propylene), it can reduce the bulk density of polymerization products, improve the hydrogenation sensitivity of the catalyst, and basically have no foreign matter. MgXY·(ROH)p·(H2O)q formula (1) formula (2).

Description

technical field [0001] The invention relates to an olefin polymerization catalyst carrier, a preparation method of the olefin polymerization catalyst carrier and an application of the olefin polymerization catalyst carrier in preparing an olefin polymerization catalyst. 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. The alcoholate system is quenched to form a spherical alcoholate. [0003] However, wh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/06C08F10/00C08F4/02
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