Electron donor of Ziegler-Natta catalyst and application of electron donor in vinyl polymerization

An electron donor and catalyst technology, applied in the field of ethylene polymerization catalysis, can solve the problems of high price, limited application, etc., and achieve the effects of low production cost, less fine powder of polymer products, good hydrogen-adjusted sensitivity performance and copolymerization performance.

Active Publication Date: 2016-10-12
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese patent CN1958620A adopts tetraethoxysilane as electron donor, and CN2010102089331 adopts a class of siloxane compound (POSS) with organic functional groups as electron donor, but the price of this siloxane compound is very expensive, which limits its Application in catalyst

Method used

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  • Electron donor of Ziegler-Natta catalyst and application of electron donor in vinyl polymerization
  • Electron donor of Ziegler-Natta catalyst and application of electron donor in vinyl polymerization
  • Electron donor of Ziegler-Natta catalyst and application of electron donor in vinyl polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put 4.76 g (50 mmol) of anhydrous MgCl 2 , 75 milliliters of decane and 16.3 grams (125 mmol) of isooctyl alcohol were heated to 125° C., and reacted at a constant temperature for 3 hours to obtain a homogeneous and transparent solution. To this solution was added 15 mmol of di-t-butoxytriethoxysilaluminate and stirred at 50° C. for 2 hours to dissolve di-t-butoxytriethoxysilaluminate in the solution. The homogeneous solution obtained above was cooled to room temperature, and then added dropwise to 150 mL of TiCl with stirring at -10 °C within 1 hour. 4 middle. After dropping, the temperature of the mixture was maintained at -10°C for 1 hour, then the temperature was raised to 120°C at a certain rate of temperature increase under stirring, and the temperature was maintained for 2 hours. After 2 hours of reaction, the resulting solid was separated by hot filtration. The solid catalyst is fully washed with decane and hexane respectively until no precipitated titanium c...

Embodiment 2

[0038] Put 4.76 g (50 mmol) of anhydrous MgCl 2 , 75 milliliters of decane and 16.3 grams (125 mmol) of isooctyl alcohol were heated to 125° C., and reacted at a constant temperature for 3 hours to obtain a homogeneous solution. To this solution was added 15 mmol of diisopropoxytriethoxysilaluminate and stirred at 50°C for 2 hours to dissolve diisopropoxytriethoxysilaluminate in the solution. All the homogeneous solutions obtained above were cooled to room temperature, and then added dropwise to 200 mL of TiCl maintained at -15 °C within 1 hour while stirring 4 middle. After completion of the dropwise addition, the temperature of the mixture was maintained at -15°C for 1 hour, then raised to 120°C over 4 hours with stirring, and maintained at this temperature for 2 hours. After 2 hours of reaction, the resulting solid was separated by hot filtration. The solid catalyst is fully washed with decane and hexane respectively until no precipitated titanium compound can be detecte...

Embodiment 3

[0042] 4.76 g (50 mmol) of anhydrous magnesium chloride, 75 ml of decane and 16.3 g (125 mmol) of isooctyl alcohol were heated to 125° C. and reacted at constant temperature for 3 hours to obtain a homogeneous solution. To this solution was added 15 mmol of diethoxytriethoxysilaluminate and stirred at 50°C for 2 hours to dissolve diethoxytriethoxysilaluminate in the solution. All the homogeneous solutions obtained above were cooled to room temperature, and then added dropwise to 150 mL of TiCl with stirring at 0 °C within 1 hour 4 middle. After completion of the dropwise addition, the temperature of the mixture was maintained at 0°C for 1 hour, then raised to 120°C over 2 hours with stirring, and maintained at this temperature for 2 hours. After 2 hours of reaction, the resulting solid was separated by hot filtration. The solid catalyst is fully washed with decane and hexane respectively until no precipitated titanium compound can be detected in the cleaning liquid, and a so...

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Abstract

The invention relates to an electron donor of a Ziegler-Natta catalyst, a catalyst component comprising the electron donor and the catalyst. The electron donor adopts a Si-Al ester compound; the catalyst prepared from the Si-Al ester compound serving as the electron donor shows higher catalytic activity, better hydrogen response and better copolymerization performance when applied to vinyl polymerization and copolymerization, and can be used for catalyzing vinyl homopolymerization or production of high-performance polyolefin materials with high bulk density, narrow particle size distribution and small fine grain content through copolymerization of vinyl and other alpha-olefins.

Description

technical field [0001] The invention belongs to the field of ethylene polymerization catalysis, and relates to a Ziegler-Natta catalyst, in particular to an electron donor of a Ziegler-Natta catalyst and its application in ethylene polymerization technical background [0002] In recent years, the development of high-end polyolefin special materials has always been the focus in this field, and the research and development of corresponding catalysts is also a difficult point in the field of polyolefin research. Ziegler-Natta titanium series catalysts are still the main catalysts for the industrial production of polyolefins. They have been developed with high catalytic activity, good hydrogen adjustment sensitivity, good copolymerization performance, uniform particle size distribution of polymers, less fine powder, and low polymer wax content. Low-cost, stable and controllable production of polyolefin catalysts is the goal pursued by researchers. There are many literatures and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F110/02C08F4/646C08F4/654C08F4/656
CPCC08F4/6465C08F4/6543C08F4/6565C08F10/02C08F110/02C08F2500/12C08F2500/18C08F2500/24
Inventor 姜涛高金龙李健李明凯张眉邵怀启陈延辉闫冰
Owner TIANJIN UNIV OF SCI & TECH
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