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Catalyst for vinyl polymerization and preparation method thereof

A technology of ethylene polymerization and catalyst, which is applied in the field of ethylene polymerization catalyst and its preparation method, which can solve the problems of high toxicity and high requirements for operating conditions, and achieve simplification of raw materials and processes, shortening of washing and filtration time, and shortening of the preparation cycle Effect

Active Publication Date: 2013-03-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the above-mentioned co-catalyst system is relatively toxic, such as phthalic anhydride is also carcinogenic, and requires high operating conditions

Method used

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  • Catalyst for vinyl polymerization and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: After high-purity N 2 In the fully replaced reactor, sequentially add 0.0210mol anhydrous MgCl 2 , 0.246mol n-decane, add 0.0765mol 2-ethylhexanol under stirring, raise the temperature to 115°C, maintain for half an hour, add 0.00119mol nano-nickel powder, maintain for half an hour, cool down to 50°C, add 0.0131mol SiCl 4 , the solution was cooled to -10°C, and then 0.448mol of titanium tetrachloride was dropped into it, maintained for 1 hour, then heated to 120°C, maintained for 1 hour, filtered, washed with hexane for 4 times, and dried in vacuum to obtain solid catalyst.

Embodiment 2

[0030] Embodiment 2: After high-purity N 2 In the fully replaced reactor, sequentially add 0.0210mol anhydrous MgCl 2 , 0.295mol n-decane, add 0.0765mol 2-ethylhexanol under stirring, raise the temperature to 115°C, maintain for half an hour, add 0.000852mol nano nickel powder, maintain for half an hour, cool down to -10°C, add 0.0175mol SiCl 4 , maintained for half an hour, then 0.358 mol of titanium tetrachloride was dropped into it, maintained for half an hour, then raised to 110°C, maintained for 1 hour, filtered, washed with hexane four times, and vacuum-dried to obtain a solid catalyst.

Embodiment 3

[0031] Embodiment 3: After high-purity N 2 In the fully replaced reactor, sequentially add 0.0210mol anhydrous MgCl 2 , 0.295mol n-decane, add 0.0765mol 2-ethylhexanol under stirring, raise the temperature to 115°C, maintain for half an hour, add 0.000852mol nano-nickel powder, maintain for half an hour, cool down to -10°C, and dissolve 0.358mol tetrachloride Titanium is dropped into it, maintain for half an hour, add 0.00902mol Si(OEt) 4 , maintained for half an hour, then raised the temperature to 110° C., maintained for 1 hour, filtered, washed with hexane four times, and dried in vacuum to obtain a solid catalyst.

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Abstract

The invention relates to a catalyst for vinyl polymerization and a preparation method thereof, wherein a nickel-contained titanium solid catalyst component is obtained through the steps of firstly enabling magnesium halide and organic alcohol to react so as to form a uniform solution, then, mixing with metal nickel powder, and then, acting with a mixture solution of a halide of transition metal titanium or a derivative thereof; an electron donor can also be added in the preparing process so as to improve the performance; and the catalyst shows high activity and sensitivity to hydrogen regulation used in olefinic polymerization. With the adding of the metal nickel powder, the metal nickel powder can serve as a crystal nucleus so as to facilitate the precipitation of catalyst solids; and with the adoption of the method, the settlement and the separation for a mother liquor system of the catalyst are facilitated, the time for washing and filtering the catalyst can be remarkably shortened, and therefore, the preparation cycle of the catalyst is remarkably shortened.

Description

field of invention [0001] The present invention relates to a catalyst for ethylene polymerization and its preparation method. Background technique [0002] Since its invention in the 1930s, polyethylene has been widely used in industry, agriculture, packaging and daily industry due to its abundant raw materials and excellent product performance. occupies an important position. [0003] During the development of polyethylene, the research on catalysts has always been the core of polyethylene synthesis research, and plays an important role in the synthesis and production of polyethylene. Before the 1980s, the focus of polyethylene catalyst research was on the pursuit of catalyst efficiency. After nearly 30 years of hard work, the catalytic efficiency of polyethylene catalysts has increased by orders of magnitude, thereby simplifying the production process of polyolefins and reducing energy and material consumption. The traditional Z-N catalyst started from the classic titani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/70
Inventor 王毅张立伟黄廷杰王丽莎
Owner CHINA PETROLEUM & CHEM CORP
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