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A kind of polyolefin catalyst and its preparation method and application

A polyolefin catalyst and compound technology, applied in the field of polyolefin, can solve the problems of increasing the ash content of polypropylene resin, downstream processing, application scope and product performance impact, etc.

Inactive Publication Date: 2019-10-25
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this will inevitably increase the ash content of polypropylene resin, which will affect the downstream processing, application range and product performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) 5g MgCl 2 , 23ml of 2-ethylhexanol, and 30ml of n-decane were mixed and reacted in a 200ml reaction bottle, and the temperature was raised to 130°C with stirring. After the system became transparent, 0.01mol of diisobutyl phthalate and tetrabutyl titanate were added The esters were mixed and stirred in the reaction kettle for reaction, and the temperature was kept at 130°C for 1 hour to obtain a transparent alcoholate, which was cooled to room temperature;

[0028] (2) Take 250ml TiCl 4 Add it into the catalyst reactor and cool down to -20°C and stir at a stirring speed of 150rpm / min. Slowly add the cooled alcoholate in step (1) to the low-temperature TiCl 4 middle;

[0029] (3) After completing the dripping procedure of (2) step, introduce an ultrasonic generating device to provide ultrasonic vibration, and the ultrasonic frequency is maintained at 20KHz;

[0030] (4) Add ultrasonic vibration at -20°C, then slowly increase the temperature, stop the ultrasonic at...

Embodiment 2

[0033] The catalyst was prepared in the same manner as in Example 1, except that the ultrasonic frequency in step (3) was 40KHz.

Embodiment 3

[0035] The catalyst was prepared in the same manner as in Example 1, except that the ultrasonic frequency in step (3) was 60KHz.

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PUM

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Abstract

The invention provides a polyolefin catalyst and preparation method and application thereof. The preparation method comprises the following steps: (1), mixing, stirring and reacting MgCl2, organic alcohol, C9-C20 alkane, alkoxy titanium compound and internal electron donor compound; (2) cooling TiCl4 to -30 to -10 DEG C, and then dropwise adding the alcohol compound obtained in the step (1); (3) placing the obtained alcohol compound obtained in the step (2) in an ultrasonic device with the ultrasonic frequency of 20-350KHz; (4) gradually warming under the ultrasonic oscillation effect, and repeatedly adding the internal electron donor compound; and (5) stirring and reacting at 100-130 DEG C, adding titanium tetrachloride again after filtering, continuously reacting for 1-2 hours under the stirring at 100-130 DEG C. The ultrasonic means is introduced in the preparation process of the catalyst, not only is the porosity of a catalyst carrier added, but also is the catalytic activity of the catalyst added. For the produced polypropylene and related products, the adding amount of the deacidifying agent in the subsequent pelletizing working process, the ash content of the product is lowered, the comprehensive performance of the product is improved, and an application range of the product is broadened.

Description

technical field [0001] The invention belongs to the field of polyolefins, and relates to a polyolefin catalyst, in particular to a polyolefin catalyst with a wide and adjustable particle diameter, its composition, preparation method and application, which are applicable to gas phase polymerization conditions. Background technique [0002] In the production of polypropylene resin, catalyst components will inevitably remain. In order to eliminate the acidic components of the catalyst remaining in the resin, acid scavengers such as calcium stearate and hydrotalcite are generally used. However, this inevitably increases the ash content of the polypropylene resin, which affects the downstream processing, application range and product performance of the product. [0003] In order to reduce the residual catalyst components in polypropylene resin and reduce the amount of acid scavenger added to reduce the ash content of polypropylene resin and broaden the application field of polyp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/618C08F4/611
CPCC08F10/00C08F4/6183C08F4/611
Inventor 李春启杨渊刘学武梅长松李金阁寇志胜
Owner DATANG INT CHEM TECH RESINST