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Olefin polymerization catalyst, as well as combined catalyst containing same and application thereof

A technology for olefin polymerization and catalysts, which is applied to olefin polymerization catalysts and combined catalysts containing it and its application fields, and can solve problems such as inconvenience, narrow molecular weight distribution of propylene homopolymer, and inconvenient processing

Active Publication Date: 2015-03-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MgCl prepared by spray drying 2 / SiO 2 When a spherical composite carrier and a diether are used as an internal electron donor to prepare a Z-N catalyst, although the resulting catalyst shows high catalytic propylene polymerization activity, sensitive hydrogen tuning performance and high stereospecificity, the molecular weight of the obtained propylene homopolymer The distribution is narrow, which brings inconvenience to the post-processing process; in addition, the obtained propylene polymer has a low bulk density, which is not convenient for actual industrial production

Method used

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  • Olefin polymerization catalyst, as well as combined catalyst containing same and application thereof
  • Olefin polymerization catalyst, as well as combined catalyst containing same and application thereof
  • Olefin polymerization catalyst, as well as combined catalyst containing same and application thereof

Examples

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Effect test

Embodiment 1

[0089] This embodiment provides an olefin polymerization catalyst, which is prepared by the following method:

[0090] Spherical MgCl 2 / SiO 2 The preparation of the composite carrier is carried out in two steps:

[0091] 1) preparation of spray-dried mother liquor: after passing through N 2 Add 200mL of dehydrated ethanol to the fully replaced 400mL reactor with stirring; at room temperature, add 20g of anhydrous magnesium chloride while stirring, and control the adding speed of magnesium chloride to keep the system temperature below 40°C; the addition of magnesium chloride is complete Finally, the temperature of the mixed system was raised to 70°C, and kept at this temperature for 4 hours to obtain a uniform ethanol solution of magnesium chloride; Mother liquor;

[0092] 2) Preparation of MgCl by spray drying 2 / SiO 2 Spherical carrier: use a spray dryer to prepare a composite carrier; use a peristaltic pump to introduce the obtained mother liquor into a two-fluid nozz...

Embodiment 2

[0096] This example provides an olefin polymerization catalyst, the preparation method of which is basically the same as that in Example 1, the only difference is that in addition to adding 1,8-binaphthol di-p-toluenesulfonate, at the same time adding o-benzene Dibutyl diformate, its use amount is 1.24g.

Embodiment 3

[0098] This example provides an olefin polymerization catalyst whose preparation method is basically the same as that in Example 1, the only difference being that 1,8-binaphthol di-p-toluenesulfonate is replaced by 9,9-bis (P-toluenesulfonate methyl) fluorene, the usage amount is 3.20 g, and 9,9-bis(methoxymethyl) fluorene is added at the same time, the usage amount is 1.16 g.

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Abstract

The invention provides an olefin polymerization catalyst, as well as a combined catalyst containing the same and an application thereof. The olefin polymerization catalyst contains reaction products of the following raw materials: a composite carrier prepared by spray-drying magnesium halide and silicon dioxide, at least one compound selected from a group composed of dihydric alcohol sulphonate compounds, at least one compound selected from a group composed of a monohydric fatty group carboxylic ester compound, a dihydric fatty group carboxylic ester compound, a monohydric aromatic carboxylic ester compound, a dihydric aromatic carboxylic ester compound and a diether compound, and a titanium halide compound. The combined catalyst contains the olefin polymerization catalyst, an alkyl aluminium compound and the like. The olefin polymerization catalyst adopts two kinds of internal electron donor compounds, and can guarantee the stereoregularity of a prepared polymer while guaranteeing the catalyst activity.

Description

technical field [0001] The invention relates to a solid catalyst for olefin polymerization, a combined catalyst containing it and the application of the combined catalyst, more particularly, to a composite carrier and a composite catalyst prepared by spray-drying magnesium halide and silicon dioxide. The catalyst prepared from the electron donor, the composite catalyst containing it and the application of the composite catalyst in olefin polymerization belong to the technical field of olefin polymerization catalysts. Background technique [0002] As is well known, Ziegler-Natta catalysts used for olefin polymerization, especially α-olefin polymerization with three or more carbon atoms, generally include two parts: a main catalyst and a co-catalyst. The main catalyst is mostly composed of MgCl 2 Support, titanium compound (usually TiCl 4 ) reacts with an internal electron donor. It is generally believed in the industry that MgCl 2 The support acts as a skeleton, and the s...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/02
Inventor 尹宝作义建军齐越飞刘淑娟鞠万庆王永刚张明革朱百春李红明袁苑王仪森高克京
Owner PETROCHINA CO LTD
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