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Catalyst containing ether-based ester and application of the catalyst and ether-based ester in olefin polymerization

An olefin polymerization and catalyst technology, applied in the field of olefin polymerization, can solve problems such as catalyst difficulties, and achieve the effects of improving hydrogen modulation sensitivity and isotacticity, high activity and simple polymerization method

Active Publication Date: 2019-02-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, it is difficult to effectively adjust the comprehensive performance of the catalyst through the external electron donor or the composition of the external electron donor compound, that is, to obtain a catalyst with superior orientation ability and hydrogen tuning sensitivity.

Method used

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  • Catalyst containing ether-based ester and application of the catalyst and ether-based ester in olefin polymerization
  • Catalyst containing ether-based ester and application of the catalyst and ether-based ester in olefin polymerization
  • Catalyst containing ether-based ester and application of the catalyst and ether-based ester in olefin polymerization

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0103] This preparation example is used to illustrate the preparation of the titanium-containing solid catalyst component

[0104] The titanium-containing solid catalyst was prepared according to the method disclosed in CN201010548601.8. Specifically, 4.8 g of magnesium chloride, 70 ml of toluene, 4 ml of epichlorohydrin, and tributyl phosphate were sequentially added to the reactor fully replaced by high-purity nitrogen. (TBP) 12.5ml, 1.0ml tetraethoxysilane, the temperature was raised to 60°C with stirring, and maintained for 1.0 hours, the solid was completely dissolved. 1.4 g of phthalic anhydride and 30 ml of toluene were added and maintained for 1 hour. Cool the solution to below -28°C and add TiCl dropwise within 1 hour 4 56ml (5ml / min), slowly heat up to 85°C (5°C / min), gradually separate out solids during the heating process, add 1.1ml of di-n-butyl phthalate, maintain the temperature at 85°C for 1 hour, after filtration, Washed twice with toluene to obtain a solid ...

Embodiment 1-16 and comparative example 1-4

[0106] According to the types of external electron donors, the addition ratio and the amount of hydrogen added in Examples 1-16 and Comparative Examples 1-4 in Table 1, and with reference to the following conditions, the polymerization of propylene was carried out

[0107] In a 5-liter autoclave, purged with nitrogen flow at 70°C for 1 hour, then replaced the polymerization autoclave three times with gas-phase propylene, and introduced 5 ml of a hexane solution of an alkylaluminum compound (triethylaluminum) under nitrogen protection. concentration of 0.5 mmol / ml), 1 ml of the hexane solution of the external electron donor compound (the concentration of the external electron donor is 0.1 mmol / ml), 10 ml of anhydrous hexane and 8-12 mg of the titanium-containing compound prepared in the preparation example Solid catalyst component. The autoclave was closed, and a certain volume of hydrogen (at 25° C., normal pressure) (L) and 1.0-1.2 Kg of liquid propylene were introduced; the ...

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Abstract

The invention relates to the field of olefin polymerization and discloses application of an external electron donor containing an ether ester compound as shown in a formula (I), i.e., R<5>-O-R<4>(R<3>(COOR<1>)COOR<2>), to an olefin polymerization reaction. Moreover, the invention also discloses a catalyst containing the ether ester compound as shown in the formula (I) and application of the same to the olefin polymerization reaction. According to the invention, the ether ester compound is applied as the external electron donor to the olefin polymerization reaction, and in particular, a composition of the ether ester compound and a dialkoxysilane compound is applied to the olefin polymerization reaction; so the catalyst can maintain high activity and has improved hydrogen response, a finally prepared polymer has high activity and isotacticity, and a polymerization method is simple.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular, the invention relates to the application of ether-based ester compounds as external electron donors in olefin polymerization reactions, a catalyst containing the ether-based esters, and the application of the catalyst in olefin polymerization reactions. Background technique [0002] As we all know, the catalyst system used in the polymerization of α-olefins and their mixtures generally consists of three parts, which are: (1) main catalyst (solid catalyst), (2) co-catalyst (usually alkyl aluminum compounds) and (3) an external electron donor compound added during polymerization. [0003] The use of one or several external electron donor compounds to control the stereoregularity and morphology of polymers during polymerization is well known to those skilled in the art. In addition to affecting the stereoregularity of the polymer, the external electron donor often affects the cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/649C08F4/646C08F110/06
Inventor 张天一夏先知郭正阳
Owner CHINA PETROLEUM & CHEM CORP
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