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Solid catalyst component and catalyst system used for olefin polymerization, and olefin polymerization method

A solid catalyst and olefin polymerization technology, applied in the field of olefin polymerization, can solve problems such as difficult to tie molecules, lack of copolymerization units, insufficient product performance, etc., to achieve the effect of improving copolymerization performance and polymerization activity

Active Publication Date: 2019-01-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, some low-molecular-weight components become low-molecular-weight waxes with low melting points, while high-molecular-weight components are difficult to become tie molecules due to the lack of copolymerization units, resulting in insufficient product performance

Method used

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  • Solid catalyst component and catalyst system used for olefin polymerization, and olefin polymerization method
  • Solid catalyst component and catalyst system used for olefin polymerization, and olefin polymerization method
  • Solid catalyst component and catalyst system used for olefin polymerization, and olefin polymerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0168] (1) Preparation of solid catalyst component a

[0169] Mix 50mL of di-n-butylmagnesium in heptane (1M) with 0.1g of cyclotriveratrol (M 1 = M 2 = M 3 = M 4 = M 5 = M 6 =OCH 3 ) were mixed at room temperature, and then slowly dropped into 50 mL of titanium tetrachloride at -10°C, and kept at constant temperature for 1 hour after the addition was completed. The temperature of the system was gradually raised to 80°C, and the temperature was kept constant for 2 hours. Stirring was stopped, and the suspension was left to stand. The suspension was quickly separated into layers, and the supernatant liquid was removed, washed with toluene and hexane several times, and then dried to obtain solid catalyst component a with good fluidity. The composition is shown in Table 1.

[0170] (2) homopolymerization reaction

[0171] ① Polymerization with low hydrogen / ethylene ratio

[0172] A stainless steel reaction kettle with a volume of 2L is fully replaced by high-purity nitro...

Embodiment 2

[0188] (1) Preparation of solid catalyst component b

[0189] 4.0 grams of magnesium chloride, 50 mL of toluene, 3.0 mL of epichlorohydrin, 9 mL of tri-n-butyl phosphate, 4.4 mL of ethanol, and 0.3 g of cyclotriveratrol derivatives (M 1 = M 2 = M 3 = M 4 = M 5 = M 6 =OCH 2 CH 3 ) was added into the reaction kettle, and the reaction was carried out at a constant temperature for 2 hours under the condition that the temperature was 70°C. The system was cooled down to -10°C, 70 mL of titanium tetrachloride was slowly added dropwise, and then 5 mL of tetraethoxy silicon was added, the temperature was gradually raised to 85°C, and the temperature was kept constant for 1 hour. Stirring was stopped, and the suspension was left to stand. The suspension was quickly separated into layers, and the supernatant was extracted, washed with toluene and hexane several times, and then dried to obtain a solid catalyst component b with good fluidity. The composition is shown in Table 1.

...

Embodiment 3

[0208] (1) Preparation of solid catalyst component c

[0209]Add 4.0 g of magnesium chloride, 50 mL of toluene, 3.0 mL of epichlorohydrin, 9 mL of tri-n-butyl phosphate, and 4.4 mL of ethanol into the reaction kettle, and react for 2 hours at a temperature of 70°C. The system was cooled down to -10°C, 70 mL of titanium tetrachloride was slowly added dropwise, and then 5 mL of tetraethoxy silicon was added, the temperature was gradually raised to 85°C, and the temperature was kept constant for 1 hour. Add 0.2g cyclotriveratrol derivative (M 1 = M 3 = M 5 =OCH 3 ; 2 = M 4 = M 6 =OCH 2 CH 3 ), and continue to hold the temperature for 1 hour. Stirring was stopped, and the suspension was left to stand. The suspension was quickly separated into layers, and the supernatant was removed, washed with toluene and hexane several times, and then dried to obtain a solid catalyst component c with good fluidity. The composition is shown in Table 1.

[0210] (2) homopolymerization re...

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Abstract

The invention relates to the field of olefin polymerization catalysts, and specifically relates to a solid catalyst component and catalyst system used for olefin polymerization, and an olefin polymerization method. The solid catalyst component includes reaction products of the following components: 1) a liquid component containing magnesium, 2) a titanium compound, 3) an internal electron donor compound, and optionally selected 4) an assistant precipitating agent. The internal electron donor compound is selected from at least one of cyclotriveratrylene and derivatives thereof shown as a formula (I), and M1-M6 are selected from hydrogen, hydroxy, amino, an aldehyde group, a carboxyl group, an acyl group, halogen atoms. Through the introduction of the cyclotriveratrylene and derivatives thereof as internal electron donors, the polymerization activity, hydrogen response and copolymerization performance of the polyolefin catalyst can be enhanced. The structure of the cyclotriveratrylene and the derivatives thereof is shown as the formula (1).

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, in particular to a solid catalyst component for olefin polymerization, a solid catalyst component for olefin polymerization, and an olefin polymerization method. Background technique [0002] Since the advent of Ziegler-Natta polyolefin catalysts, after nearly 60 years of development, resins such as polyethylene and polypropylene produced through it have become the most important resin products in the world. During this period, due to the continuous development of technology, various types of polyolefin catalysts, such as supported type, post-treatment type, dissolution type and spray drying type, were gradually produced. Due to the advantages of short preparation process and easy control of particle size, the dissolution-elution catalyst has gradually become a research hotspot. In the prior art, certain types of dissolution catalysts have the advantages of high polymerization acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/02C08F210/16C08F210/08C08F4/649
CPCC08F10/00C08F110/02C08F210/16C08F4/6494C08F210/08
Inventor 黄庭孙竹芳郭子芳周俊领谢伦嘉苟清强杨红旭朱孝恒李秉毅黄廷杰
Owner CHINA PETROLEUM & CHEM CORP
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