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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

A catalyst and polyolefin technology, applied in the application field of catalyst system, can solve the problems of wide molecular weight distribution of polyolefin, unsuitable for use as fiber material, low catalytic activity, etc., and achieve narrow molecular weight distribution, excellent kinetic performance, high The effect of polymerization activity

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 purpose of the present invention is to overcome the method for adopting the existing catalyst component of polyolefin for preparing fiber, the catalyst component obtained when being used for catalyst system to carry out polymerization, catalytic activity is low, the prepared polyolefin The defects of wide molecular weight distribution and low isotacticity, which are not suitable for use as fiber materials, provide a method for preparing catalyst components for preparing 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

Examples

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preparation example Construction

[0031] The invention provides a method for preparing a catalyst component for preparing polyolefin fibers, which may include the following steps: (1) performing a first contact reaction with a magnesium halide and an alcohol compound in the presence of a hydrocarbon solvent to form 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 a titanium compound to obtain a mixture containing solid precipitation; (3) the mixture obtained in step (2) is 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 product; (5) the so...

Embodiment approach

[0061] According to a preferred embodiment of the present invention, the method for preparing the catalyst solid component of polyolefin for fiber provided by the present invention can be carried out according to the following steps:

[0062] (1) Under a hydrocarbon solvent, anhydrous magnesium chloride and an alcohol compound are subjected to the first contact reaction at 30-150° C. (preferably 60-140° C.) for 0.5-10 hours (preferably 0.5-6 hours) to obtain a uniform Alcohol solution, wherein the molar ratio of anhydrous magnesium chloride to alcohol compounds is 1:2-4 (preferably 1:2.5-3.5);

[0063] (2) Add diol ester compound (separation aid a), aliphatic or aromatic carboxylic acid ester compound (separation aid b) and titanate compound (separation aid c) to the above alcohol In the compound solution, the molar ratio of anhydrous magnesium chloride to the glycol ester compound is 1:0.005-0.1 (preferably 1:0.01-0.05), and the molar ratio of anhydrous magnesium chloride to ...

Embodiment 1

[0108] (1) Preparation of Catalyst Component A1

[0109] (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 110°C, the reaction was carried out for 3.0 hours to obtain a stable and uniform alcoholate solution;

[0110] (2) Add 3,5-heptanediol dibenzoate 48mmol (24ml), diisobutyl phthalate 336mmol (90ml) and tetrabutyl titanate 132mmol (45ml) to the above alcoholate solution , stirred for 60 minutes, cooled to room temperature to obtain a homogeneous solution; the above homogeneous solution was added to fully replaced by nitrogen, and equipped with 60mol (6.6L) of titanium tetrachloride and 11.4mol (1.2L) of toluene at -20°C In the reactor, they were fully contacted at -20°C by stirring. After 5 hours, the temperature was raised to 100°C. During t...

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Abstract

The invention discloses a method for preparing a catalyst compound for preparing polyolefin for fibers, wherein the method comprises the steps: carrying out a first contact reaction of magnesium halide with an alcohol compound in the presence of a hydrocarbon solvent, to form a uniform solution; in the presence of a precipitation aid, carrying out a second contact reaction of the uniform solution with a titanium compound, to obtain a mixture containing a solid precipitate; and carrying out a third contact reaction of the obtained mixture with 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 compound and an application thereof in a catalyst system, the catalyst system for preparing the polyolefin for the fibers, an application of the catalyst system in olefin polymerization reaction for preparation of a fiber material, and a polymerization method for preparing the polyolefin for the fibers. A polymer prepared by using the prepared catalyst compound has the advantages of narrow molecular weight distribution and high regularity, and is suitable for production of fiber-graded 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 谭忠周奇龙严立安徐秀东张锐宋维玮李凤奎于金华尹珊珊
Owner CHINA PETROLEUM & CHEM CORP
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