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Catalyst for vinyl polymerization reaction

A technology of ethylene polymerization and catalyst, which is applied in the field of preparation of the catalyst and can solve problems such as unsatisfactory results

Active Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In CN03816816 invention, it is mentioned that adding alcohol compounds to MgCl in the system 2 improved dissolution, but the results are still not satisfactory

Method used

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  • Catalyst for vinyl polymerization reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of catalyst

[0032] Add 1.5 grams of TiCl successively to a 250ml three-neck bottle that has been purged with nitrogen 4 , 4.4 grams of anhydrous MgCl 2 , 0.4 g of methanolamine and 100 ml of tetrahydrofuran, heated to 65° C. under stirring, and reacted at a constant temperature at this temperature for 3 hours. Cool down to 35°C.

[0033] Add 6 grams of silica gel (Cabot Corporation TS-610, particle size 0.02-0.1 micron) into a 250ml three-neck bottle that has been purged with nitrogen, add the mother liquor after cooling down, keep the temperature at 35°C, and stir for 1 hour. The mixed mother liquor is spray-dried with a spray dryer (model of the instrument: BUCHI Mini Spray Dryer B-191), spraying conditions: inlet temperature 195 ° C, outlet temperature 110 ° C, to obtain a solid catalyst component, wherein the titanium content is 2.3 wt%.

[0034] (2) Ethylene slurry polymerization

[0035] Add 1 liter of hexane into the 2 liter polymerization ...

Embodiment 2

[0037] (1) The preparation of the catalyst is the same as in Example 1. Only the amount of methanolamine was 0.8 g, and the titanium content of the resulting solid catalyst component was 2.2 wt%.

[0038] (2) Ethylene slurry polymerization is the same as in Example 1. The aggregation results are shown in Table 1.

Embodiment 3

[0040] (1) The preparation of the catalyst is the same as in Example 1. Only the amount of methanolamine was 0.6 g, and the titanium content of the resulting solid catalyst component was 2.3 wt%.

[0041] (2) Ethylene slurry polymerization is the same as in Example 1. The aggregation results are shown in Table 1.

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Abstract

The invention relates to a catalyst for vinyl polymerization reaction, a method for preparing the same and an application thereof. The catalyst comprises the reaction products of the following components: (1) titaniferous active component: magnesium dihalide, at least one titanium halide, at least one electron donor compound and an amino compound which has a formula of RONH2 are loaded on a superfine inorganic oxide carrier, wherein R is alkyl which has 1-10 carbon atoms, and the electron donor compound is selected from ether, ester or ketone; and (2) activating agent component: organo-alumnium compound which has the formula of AlR'nX3-n, wherein in the formula, R' is alkyl which has 1-20 hydrogen or carbon atoms, X is halogen, and n is not larger than 3 but is larger than 1. The catalyst has higher catalyst activity when being used for vinyl homo-polymerization or the copolymerization of vinyl and other alpha-olefin, and the polymer stacking density is also improved.

Description

technical field [0001] The invention relates to a catalyst for ethylene polymerization, as well as a preparation method and application of the catalyst. technical background [0002] It is well known that in the polymerization of olefins, especially the polymerization of ethylene or the copolymerization of ethylene and α-olefins, catalysts based on magnesium, titanium, halogens and electron donors are mostly used. When this type of catalyst is used in a gas-phase fluidized bed polymerization process, in order to ensure that the shape and particle size distribution of the catalyst particles are more suitable for the operation in a fluidized state, the above-mentioned catalyst components are usually supported on a carrier such as silica gel. Due to the use of silica gel, the catalyst needs to have a higher activity to ensure a certain low amount of ash in the final polyolefin resin. Among such catalysts, MgCl 2 The solubility in the solvent is particularly important, and onl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/646C08F4/654
Inventor 闫力欣张彤暄安京燕
Owner CHINA PETROLEUM & CHEM CORP