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Catalyst for vinyl polymerization or copolymerization as well as preparation and application thereof

A technology of ethylene polymerization and catalyst, applied in the field of catalysts, can solve the problems of unsatisfactory polymer particle shape and particle size distribution, difficulty in uniform distribution of catalyst active ingredients, unsatisfactory catalyst efficiency, etc., and achieve good industrialization prospects , Avoid agglomeration and wall sticking phenomenon, the effect of moderate particle size

Active Publication Date: 2009-09-02
迈瑞尔实验设备(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in patents such as US302565, US4379759, and CN1064870A, titanium compounds, magnesium compounds, and electron donors are loaded on carriers such as inorganic magnesium compounds and silica gel. Due to the uneven particle size distribution of the carrier itself, the effective components of the catalyst are controlled on the catalyst carrier. The uniform distribution on the surface is difficult, the repeat stability during the catalyst preparation process is poor, and the particle morphology and particle size distribution of the obtained polymer are not satisfactory
[0003] In US4376062, on the basis of the above-mentioned active components of the catalyst, fumed silica is used as a carrier, mixed with the matrix prepared by titanium compound, magnesium compound and electron donor compound, and the catalyst is prepared by spray drying. The catalyst is used for After the ethylene gas phase fluidized bed polymerization process, the particle size of the obtained catalyst and the particle shape of the polymer are easy to control, but the efficiency of the catalyst is not satisfactory and is not suitable for industrial production
[0004] In US501372 and US5081090, alkoxymagnesium reacts with carbon dioxide to form a homogeneous solution, reacts with a halogenating agent at low temperature to form a magnesium halide carrier, or supports titanium to form a solid catalyst while generating a magnesium halide carrier. In the method described in this patent, the form of the catalyst is Difficult to control, the synthesized polymer has poor morphology and low apparent density, which is not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Catalyst Preparation

[0028] Add 3g of ethoxymagnesium chloride to a 250ml there-necked flask blown by nitrogen, add ethanol according to the molar ratio of anhydrous magnesium compound and alcohol compound as 1:15, heat and reflux and stir for 2 hours, cool to room temperature, and filter Add 30ml of heptane to it, add triethylaluminum according to the ratio of anhydrous magnesium compound to organoaluminum compound molar ratio of 2:1, slowly heat up to 60°C and add 2ml of Ti(OC 4 h 9 ) 4 , reacted at constant temperature for 2 hours, cooled, filtered off the supernatant and added TiCl according to the ratio of anhydrous magnesium compound to titanium halide molar ratio of 1:20 4 , heated to 120°C for 2 hours, cooled to room temperature, washed 5 times with hexane, and vacuum-dried to obtain an off-white catalyst. The content of Ti in the catalyst was 3.84wt%, and the content of Mg was 7.86wt%. The slurry catalyst is reserved for future use.

[0029] 2. Polymer...

Embodiment 2

[0032] 1. Catalyst Preparation

[0033] Add 3g of n-butylmagnesium chloride to a 250ml there-necked flask blown by nitrogen, add ethanol according to the molar ratio of anhydrous magnesium compound and oxygen-containing compound as 1:20, heat and reflux and stir for 2 hours, cool to room temperature, and filter Add 30ml of heptane thereafter, add triisobutylaluminum according to the molar ratio of anhydrous magnesium compound and organoaluminum compound as 2:1, slowly heat up to 60°C and add 2ml of Ti(OC 4 h 9 ) 4 , react at constant temperature for 2 hours, cool down, filter off the supernatant and add TiCl according to the ratio of anhydrous magnesium compound to titanium halide molar ratio of 1:20 4 , heated to 120°C to react for 2 hours, cooled to room temperature, washed 5 times with hexane, and vacuum-dried to obtain an off-white catalyst. The content of Ti in the catalyst was 3.46wt%, and the content of Mg was 7.38wt%. The slurry catalyst is reserved for future use. ...

Embodiment 3

[0037] 1. Catalyst Preparation

[0038] Add 3g of ethoxymagnesium chloride to the 250ml there-necked flask blown by nitrogen, add butanol according to the molar ratio of anhydrous magnesium compound and oxygen-containing compound as 1:15, heat and reflux and stir for 2 hours, cool to room temperature, After filtering, add 30ml of heptane therein, add triethylaluminum according to the molar ratio of anhydrous magnesium compound and organoaluminum compound as 2:1, slowly heat up to 60°C and add 2ml of Ti(OC 4 h 9 ) 4 , reacted at constant temperature for 2 hours, cooled, filtered off the supernatant and added Ti(OC 4 h9 ) 4 with TiCl 4 mixture (Ti(OC 4 h 9 ) 4 :TiCl 4 =1:5) heated to 120°C for 2 hours, cooled to room temperature, washed 5 times with hexane, and dried in vacuo to obtain an off-white catalyst. The content of Ti in the catalyst was 2.75wt%, and the content of Mg was 8.42wt%. 1mg / ml of slurry catalyst was reserved for future use.

[0039] 2. Polymerization...

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PUM

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Abstract

The invention relates to a catalyst for alkene, in particular a catalyst for vinyl polymerization or copolymerization and a method for preparing the catalyst and application of the catalyst. A carrier obtained through the treatment on anhydrous magnesium compound by an alcohol compound is added with at least one activator composition, at least one reagent for an electron compound and a titanium content control element in the catalyst and at least one titanium composition to prepare the catalyst. The catalyst can be used for vinyl homopolymerization or copolymerization reaction between vinyl and other alkenes.

Description

technical field [0001] The present invention relates to a catalyst for the polymerization or copolymerization of olefins, especially ethylene, as well as the preparation method and application of the catalyst. Background technique [0002] Most of the existing catalysts for ethylene polymerization use magnesium, titanium, halogen and electron donors as the basic catalyst components. Compounds, silica gel and other carriers. For example, in patents such as US302565, US4379759, and CN1064870A, titanium compounds, magnesium compounds, and electron donors are loaded on carriers such as inorganic magnesium compounds and silica gel. Due to the uneven particle size distribution of the carrier itself, the effective components of the catalyst are controlled on the catalyst carrier. The uniform distribution on the surface is difficult, the repeat stability in the catalyst preparation process is poor, and the particle morphology and particle size distribution of the obtained polymer a...

Claims

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Application Information

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IPC IPC(8): C08F4/649C08F10/02
Inventor 朱博源
Owner 迈瑞尔实验设备(上海)有限公司
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