Catalyst for vinyl polymerization and method for preparing same

A technology of ethylene polymerization and catalyst, which is applied in the field of preparation of the catalyst, can solve the problem of low activity, achieve high activity, improve hydrogen adjustment performance, and widen the molecular weight distribution

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

Also, this catalyst has very low activity for ethylene polymerization

Method used

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  • Catalyst for vinyl polymerization and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of catalyst:

[0035] Add 0.4 ml (0.7 g) of TiCl successively to a 250 ml three-neck bottle that has been purged with nitrogen 4 , 4.0 g anhydrous MgCl 2 and 1.0 g of anhydrous AlCl 3 and 100ml of tetrahydrofuran, the temperature was raised to 65° C. under stirring, and the reaction was carried out at this temperature for 3 hours. Cool down to 35°C.

[0036] Add 6 grams of silica gel (Cabot Corporation TS-610 particle size 0.02-0.1 microns) into a 250ml three-neck bottle that has been purged with nitrogen, add the cooled mother liquor, keep the temperature at 35°C, stir for 1 hour, and then mix the silica gel The final mother liquor was spray-dried with a spray dryer, spraying conditions: inlet temperature 190° C., outlet temperature 105° C., to obtain a solid catalyst component, wherein the titanium content was 2.3 wt%.

[0037] 2. Ethylene slurry polymerization:

[0038] Add 1 liter of hexane, 1 mmol of triethylaluminum and 0.03 g of catalyst to th...

Embodiment 2

[0040] 1. Preparation of catalyst

[0041] Add 0.4 ml (0.7 g) of TiCl successively to a 250 ml three-neck bottle that has been purged with nitrogen 4 , 3.6 g anhydrous MgCl 2 and 1.4 g of anhydrous AlCl 3 and 100ml of tetrahydrofuran, the temperature was raised to 65° C. under stirring, and the reaction was carried out at this temperature for 3 hours. Cool down to 35°C.

[0042] Add 6 grams of silica gel (Cabot Corporation TS-610 particle size 0.02-0.1 microns) into a 250ml three-neck bottle that has been purged with nitrogen, add the cooled mother liquor, keep the temperature at 35°C, stir for 1 hour, and then mix the silica gel The final mother liquor was spray-dried with a spray dryer, spraying conditions: inlet temperature 190° C., outlet temperature 105° C., to obtain a solid catalyst component, wherein the titanium content was 2.3 wt%.

[0043] 2. Slurry polymerization

[0044] Same as Example 1, the polymerization results are shown in Table 1.

Embodiment 3

[0046] 1. Preparation of catalyst

[0047] Add 0.4 ml (0.7 g) of TiCl successively to a 250 ml three-neck bottle that has been purged with nitrogen 4 , 3.0 g anhydrous MgCl 2 and 2.0 g of anhydrous AlCl3 and 100ml of tetrahydrofuran, the temperature was raised to 65° C. under stirring, and the reaction was carried out at this temperature for 3 hours. Cool down to 35°C.

[0048] Add 6 grams of silica gel (Cabot Corporation TS-610 particle size 0.02-0.1 microns) into a 250ml three-neck bottle that has been purged with nitrogen, add the cooled mother liquor, keep the temperature at 35°C, stir for 1 hour, and then mix the silica gel The final mother liquor was spray-dried with a spray drier, spraying conditions: inlet temperature 190° C., outlet temperature 108° C., to obtain a solid catalyst component, wherein the titanium content was 2.2 wt%.

[0049] 2. Slurry polymerization

[0050] Same as Example 1, the polymerization results are shown in Table 1.

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Abstract

The invention provides a catalyst for vinyl polymerization. The catalyst contains titanium-containing active components and active agent components (organic aluminum compound), wherein an inorganic oxide carrier is loaded with at least one kind of magnesium dihalide, one kind of aluminum halide, at least one kind of titanium halide and at least one kind of electron donor, and the electron donor compound is ether, ester or ketone; and the general formula of the organic aluminum compound is AlRnX3-n, R is alkyl of which the number of hydrogen or carbon atoms is 1 to 20, X is halogen, and n is a numeral which is more than 1 and less than or equal to 3. When the catalyst is used for the vinyl polymerization, the catalyst has higher polymerization activity and hydrogen-adjusting sensitivity, and simultaneously the molecular weight distribution of the obtained polymers is wider.

Description

technical field [0001] The invention relates to a catalyst for ethylene polymerization or copolymerization, as well as a preparation method and application of the catalyst. technical background [0002] In the polymerization reaction of ethylene or the copolymerization reaction of ethylene and α-olefin, catalysts based on titanium, magnesium, halogen and electron donor compounds are mostly used. When this type of catalyst is applied in industry, the catalyst shows high activity, the catalyst and its polymer have good particle shape and high packing density, but usually the hydrogen adjustment sensitivity of the catalyst is not ideal, and good The sensitivity to hydrogen adjustment makes it easy to adjust the density and molecular weight of the polymer. [0003] As we all know, most catalysts for ethylene polymerization use magnesium halide as a carrier, including magnesium chloride, magnesium bromide and magnesium iodide. [0004] In the published patent CN1041763, a high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/649C08F10/02
Inventor 闫力欣张彤瑄王如恩徐世媛
Owner CHINA PETROLEUM & CHEM CORP
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