Catalyst components for preparing polyolefins for fiber, methods for their preparation and use, catalyst systems and uses, and methods for polymerizing olefins

A catalyst and polyolefin technology, applied in the application field of the catalyst system, can solve the problems of wide molecular weight distribution of polymers, low catalytic activity, low isotacticity, etc., and achieve narrow molecular weight distribution, high polymerization activity, and chain regularity. high sex effect

Active Publication Date: 2018-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The first object of the present invention is to overcome the low catalytic activity and the wide molecular weight distribution of the prepared polymer when the catalyst component obtained by the method for preparing the catalyst component of the polyolefin used in the fiber is used for the catalyst system to carry out polymerization. , Low isotacticity is not suitable for the preparation of polyolefins for fibers, and the defects of using phthalate compounds provide a new method for preparing catalyst components for the preparation of polyolefins for fibers

Method used

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  • Catalyst components for preparing polyolefins for fiber, methods for their preparation and use, catalyst systems and uses, and methods for polymerizing olefins
  • Catalyst components for preparing polyolefins for fiber, methods for their preparation and use, catalyst systems and uses, and methods for polymerizing olefins
  • Catalyst components for preparing polyolefins for fiber, methods for their preparation and use, catalyst systems and uses, and methods for polymerizing olefins

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preparation example Construction

[0031] The invention provides a method for preparing a catalyst component of polyolefin for fiber, the method comprising the following steps: (1) carrying out a first contact reaction of magnesium halide and an alcohol compound in the presence of a hydrocarbon solvent to form a homogeneous solution; (2) in the presence of a precipitation aid, the homogeneous solution obtained in step (1) is subjected to a second contact reaction with the first part of the titanium compound to obtain a mixture containing solid precipitation; (3) the mixture obtained in step (2) Carry out the third contact reaction with the electron donor compound d in the first part to obtain a suspension; (4) carry out the solid component obtained by solid-liquid separation of the suspension obtained in step (3) and the second part of the titanium compound, the second part The internal electron donor compound d is subjected to the fourth contact reaction, and then the liquid is filtered to obtain a solid produc...

Embodiment 1

[0106] (1) Preparation of Catalyst Component A1

[0107] (1) In the reactor that has been repeatedly replaced with high-purity nitrogen, add 3.150mol (300.0g) of anhydrous magnesium chloride, 19.68mol (2.1L) of toluene, and 8.4mol (1.1L) of 2-ethylhexanol in sequence , under the conditions of a stirring speed of 450rpm and a temperature of 115°C, the reaction was carried out for 3.0 hours to obtain a stable and uniform alcoholate solution;

[0108] (2) Add 124mmol (42ml) of 3,5-heptanediol dibenzoate and 132mmol (45ml) of tetrabutyl titanate to the above alcoholate solution, stir for 60 minutes, and cool to room temperature to obtain a uniform solution; Add the above-mentioned homogeneous solution into a reactor fully replaced by nitrogen and equipped with 60 mol (6.6 L) of titanium tetrachloride and 11.4 mol (1.2 L) of toluene at -20 ° C, and keep them at -20 ° C by stirring. After 5 hours, the temperature was raised to 100°C. During the heating process, solid precipitates w...

Embodiment 2

[0131] (1) Preparation of Catalyst Component A2

[0132] (1) In the reactor that has been repeatedly replaced with high-purity nitrogen, add 3.150mol (300.0g) of anhydrous magnesium chloride, 19.68mol (2.1L) of toluene, and 8.4mol (1.1L) of 2-ethylhexanol in sequence , under the conditions of a stirring speed of 450rpm and a temperature of 115°C, the reaction was carried out for 3.0 hours to obtain a stable and uniform alcoholate solution;

[0133] (2) Add 124mmol (42ml) of 3,5-heptanediol dibenzoate and 132mmol (45ml) of tetrabutyl titanate to the above alcoholate solution, stir for 60 minutes, and cool to room temperature to obtain a uniform solution; Add the above-mentioned homogeneous solution into a reactor fully replaced by nitrogen and equipped with 60 mol (6.6 L) of titanium tetrachloride and 11.4 mol (1.2 L) of toluene at -20 ° C, and keep them at -20 ° C by stirring. After 5 hours, the temperature was raised to 110°C. During the heating process, solid precipitates w...

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Abstract

The invention discloses a preparation method of a catalyst component for preparing fiber polyolefin. The preparation method comprises the following steps: carrying out a first contact reaction on magnesium halide and an alcohol compound in the presence of a hydrocarbon solvent to form a uniform solution; carrying out a second contact reaction on the uniform solution and a titanium compound in the presence of a precipitating aid to obtain a solid precipitate-containing mixture; and carrying out a third contact reaction on the obtained mixture and an internal electron donor compound d to obtain a suspension, wherein the internal electron donor compound d is a 1,3-diether compound. The invention also discloses the prepared catalyst component, an application of the catalyst component in a catalyst system, the catalyst system for preparing the fiber polyolefin, an application of the catalyst system in the olefin polymerization reaction for preparing fibers, and a polymerization method for preparing the fiber polyolefin. A polymer prepared by using the prepared catalyst component has narrow molecular weight distribution and high regularity, so the catalyst component is suitable for producing fiber grade polypropylene.

Description

technical field [0001] The present invention relates to a method for preparing a catalyst component for preparing polyolefin for fiber, the catalyst component prepared by the method, the application of the catalyst component in the catalyst system for preparing polyolefin for fiber; and a method for preparing fiber A catalyst system for polyolefin, the application of the catalyst system in the production of fiber material by olefin polymerization and a polymerization method for polyolefin for fiber. Background technique [0002] Currently, catalyst components based on magnesium, titanium and an electron donor, known in the art as Ziegler-Natta (Z-N) catalysts, are available for CH 2 =CHR Polymerization of olefins, especially in the polymerization of α-olefins with 3 carbon atoms or more, can give polymers with higher yield and higher stereoregularity. One of its preparation methods is to firstly prepare magnesium chloride into a uniform solution, and then crystallize and lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/06C08F4/651C08F4/654C08F4/649
Inventor 周奇龙谭忠徐秀东严立安张锐李凤奎于金华尹珊珊宋维玮
Owner CHINA PETROLEUM & CHEM CORP
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