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Catalyst component for vinyl polymerization or copolymerization and catalyst thereof

A technology of ethylene polymerization and catalyst, which is applied in the field of catalyst components, which can solve the problems of expensive catalyst production process equipment, uneven catalyst particles, and difficult particle size control, etc., to achieve reduced dosage, narrow particle size distribution, and improved particle shape Effect

Active Publication Date: 2010-09-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the silica gel particles are too small, they are easy to aggregate and cause inhomogeneity of the catalyst particles. In order to increase the size of the loaded catalyst particles and improve their fluidity, a spray-drying method was used in the catalyst preparation process to fill the mother liquor with silica gel. Mixed materials, and then prepared by spray-drying method, at the same time, the titanium content and catalytic activity of the catalyst are improved, which can meet the requirements of gas-phase fluidized bed condensation and super-condensed state operation technology, but for the combined process that requires a high-activity catalyst, Its particle size is not easy to control and cannot meet its requirements
At the same time, the catalyst production process equipment is expensive and the production efficiency is low

Method used

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  • Catalyst component for vinyl polymerization or copolymerization and catalyst thereof
  • Catalyst component for vinyl polymerization or copolymerization and catalyst thereof
  • Catalyst component for vinyl polymerization or copolymerization and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of catalyst components: in the reactor fully replaced by high-purity nitrogen, add 4.0g magnesium dichloride, toluene 50ml, epichlorohydrin 4.0ml, tributyl phosphate 4.0ml, ethanol 6.4ml successively, The temperature was raised to 70° C. under stirring, and the reaction was carried out at 70° C. for 1 hour when the solid was completely dissolved to form a uniform solution. Cool down to 30°C, add 4.8ml of diethylaluminum chloride with a concentration of 2.2M dropwise, and maintain the reaction at 30°C for 1 hour. The system was cooled to -25°C, 40ml of titanium tetrachloride was slowly added dropwise, and then 3ml of boric acid was added to react for 1 hour. Add 20 grams of the treated silica gel, slowly raise the temperature to 80°C, and react for 2 hours. Stop stirring, let it stand, the suspension will quickly separate into layers, remove the upper clear layer, wash twice with toluene, wash four times with hexane, and blow dry with high-purity nitroge...

Embodiment 2

[0044] (1) The synthesis of catalyst is the same as in Example 1. Only the amount of ethanol was changed from 6.4ml to 5.9ml.

[0045] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

Embodiment 3

[0047] (1) The synthesis of catalyst is the same as in Example 2. Only the dosage of diethylaluminum chloride was changed to 3.8ml.

[0048] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

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Abstract

The invention provides a catalyst component for vinyl polymerization or copolymerization. The catalyst component comprises a magnesium complex, at least one titanium compound, at least one organic alcoholic compound, at least one organic boron compound and an optional organic aluminum reaction product which are loaded on an inorganic oxide carrier. The catalyst has the advantages of high catalytic activity, high hydrogen regulation sensitivity, narrow polymer particle size distribution and the like, and is very suitable for the slurry polymerization process of ethylene and a combination polymerization process needing a catalyst with high activity.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization or copolymerization, a method for preparing the catalyst component and a catalyst for the catalyst component. technical background [0002] As we all know, the catalyst system containing Ti / Mg composite plays a dominant role in the industrial production of polyethylene, and the core of its research is nothing more than the polymerization activity of the catalyst, the particle shape and particle size distribution of the catalyst, the hydrogen adjustment sensitivity and Copolymerization performance and so on. In the ethylene polymerization process, in addition to requiring the catalyst to have high catalytic activity, it is very important to control the particle size and particle size distribution of the produced ethylene polymer. With the application in the condensed ethylene gas phase polymerization process, especially the development and wide application of the combined...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/649C08F10/02
Inventor 张韬毅郭子方周俊领王洪涛苟清强杨红旭李瑞霞徐世媛
Owner CHINA PETROLEUM & CHEM CORP
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