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Catalyst component for olefin polymerization, and preparation method thereof, and catalyst for olefin polymerization, and applications thereof

An olefin polymerization and catalyst technology, applied in the field of olefin polymerization, can solve the problems of reducing the yield of the carrier in a single kettle, poor stereo-orientation ability, low isotacticity of polypropylene, etc.

Active Publication Date: 2018-01-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] CN1580034A, CN1580035A, CN1580033A, CN1436766A and CN1552740A disclose the use of glycol ester compounds as electron donors for propylene polymerization Ziegler-Natta catalysts, which are characterized in that the molecular weight distribution is wider and the polymerization activity is higher, but when containing carboxylic acid When the spherical catalyst of the electron donor in the glycol ester is used for the polymerization of propylene, the stereospecificity is poor, and the isotacticity of the obtained polypropylene is low.
[0008] Disclosed in CN1974612A is the application of a kind of phosphoric acid ester in polypropylene catalyst as internal electron donor, but the existence of a large amount of phosphoric acid esters in the catalyst will finally bring the problem of aftertreatment
Although the technical solutions disclosed by them reduce the raw material cost of carrier preparation and simplify the carrier preparation process, due to the need to use a large amount of inert dispersion medium in the carrier preparation process, the single-pot yield of the carrier is reduced, and the inert dispersion medium Recycling increases the cost of solvent recovery; in addition, the stereoregularity of the polymer obtained in the olefin polymerization process using the olefin polymerization catalyst supported by the patent application needs to be further improved

Method used

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  • Catalyst component for olefin polymerization, and preparation method thereof, and catalyst for olefin polymerization, and applications thereof
  • Catalyst component for olefin polymerization, and preparation method thereof, and catalyst for olefin polymerization, and applications thereof
  • Catalyst component for olefin polymerization, and preparation method thereof, and catalyst for olefin polymerization, and applications thereof

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Experimental program
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preparation example Construction

[0080] The present invention also provides a method for preparing a catalyst component for olefin polymerization, the method comprising the following steps:

[0081] (1) preparing solid component, its process comprises:

[0082] (a) In a closed container, in the presence of at least one polymer dispersion stabilizer, the magnesium halide MgX 2 and organic alcohol R 1 The mixture of OH reacts at 30-160°C to form a magnesium halide alcoholate solution;

[0083] (b) reacting the magnesium halide alcoholate solution with the alkylene oxide compound represented by formula (2) at 30-160°C to generate a solid component;

[0084] Among them, X is a halogen, R 1 for C 1 -C 12 straight-chain or branched-chain alkyl;

[0085]

[0086] Among them, R 2 and R 3 same or different, each independently hydrogen or C 1 -C 5 A linear or branched alkyl group, wherein the hydrogen on the alkyl group is optionally substituted by halogen;

[0087] Wherein, in terms of per mole of magnes...

Embodiment approach

[0089] According to a preferred embodiment of the present invention, the amount of the solid component, the titanium compound and the internal electron donor is such that, based on the total weight of the catalyst component, the phosphorus content in the catalyst component calculated as phosphorus element It is 0.002-0.05% by weight, preferably 0.005-0.04% by weight.

[0090] In step (1), preferably, the organic alcohol is used in an amount of 4-20 moles per mole of magnesium; the amount of the alkylene oxide compound shown in formula (2) is 2-6 moles; the The amount of the polymer dispersion stabilizer is 0.2-5% by weight of the total amount of the magnesium halide and the organic alcohol.

[0091] In magnesium halide MgX 2 Among them, X is preferably bromine, chlorine or iodine. More preferably, the magnesium halide is selected from at least one of magnesium dichloride, magnesium dibromide and magnesium diiodide, most preferably magnesium dichloride.

[0092] in organic a...

Embodiment 1

[0132] This example is used to illustrate the catalyst component for olefin polymerization and its preparation method, catalyst for olefin polymerization and application of the present invention.

[0133] (1) Preparation of catalyst components

[0134] Into a 300mL glass reaction bottle, add 90ml (820mmol) of titanium tetrachloride, cool to -20°C, add 8g (45mmol) of the above solid component A1, and heat up to 110°C. Add 0.3mmol of tributyl phosphate and 7.3mmol of 2-isopropyl-2-isopentyl-1,3-dimethoxypropane during the heating process, filter the liquid after maintaining at 110°C for 30min, and use Titanium tetrachloride was washed twice, washed five times with hexane, and vacuum-dried to obtain the solid catalyst component Cat-1.

[0135] As measured by X-ray fluorescence spectrometry, the phosphorus content in the catalyst component Cat-1 for olefin polymerization, calculated as phosphorus element, is 0.01% by weight.

[0136] (2) Propylene liquid phase bulk polymerizatio...

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Abstract

The present invention relates to the field of olefin polymerization, and particularly provides a catalyst component for olefin polymerization, and a preparation method thereof, and a catalyst for olefin polymerization, and applications thereof. The catalyst component for olefin polymerization contains the product obtained by carrying out a reaction on a solid component, at least a titanium compound and an internal electron donor, wherein the internal electron donor contains a phosphate compound and a diether compound, the phosphorus content (calculated as the phosphorus element) in the catalyst component is not more than 0.06 wt% by using the total weight of the catalyst component as the reference, and the solid component contains a magnesium compound represented by a formula (1) and an alkylene oxide compound represented by a formula (2). According to the present invention, the catalyst component does not contain phthalate compounds (plasticizers), has high hydrogen response sensitivity and high stereospecificity, and can be used in olefin polymerization so as to obtain the polymer having narrow molecular weight distribution. The formulas (1) and (2) are defined in the specification.

Description

technical field [0001] The present invention relates to the field of olefin polymerization, in particular to a catalyst component for olefin polymerization, a preparation method for the catalyst component, a catalyst component for olefin polymerization prepared by the method, and a catalyst component containing the catalyst component for A catalyst for olefin polymerization, and the application of the catalyst for olefin polymerization in olefin polymerization. Background technique [0002] In plastic processing, melt flow rate is an important index used to measure the fluidity of plastic melt, and it is also an important reference for selecting plastic processing materials and grades. The melt flow rate depends largely on the molecular weight of the polymer, with low molecular weight polymers having a high melt flow rate. In order to obtain an olefin polymer with a high melt flow rate, it is generally necessary to add a large amount of hydrogen during polymerization, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/654C08F4/651
Inventor 夏先知赵瑾刘月祥任春红谭扬李威莅凌永泰高富堂彭人琪陈龙
Owner CHINA PETROLEUM & CHEM CORP
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