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Loaded method of Non-metallocene catalyst loaded by composite carrier and polymerizing application

A composite carrier and non-metallocene technology, applied in the field of olefin polymerization, can solve the problems of poor polymer shape, no polymer granulation performance, low catalytic activity, etc., and achieve the effect of good particle shape

Active Publication Date: 2004-10-27
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Catalysts supported on anhydrous magnesium chloride show high catalytic activity in olefin polymerization, but such catalysts are very brittle and break easily in the polymerization reactor, resulting in poor polymer morphology
Silica-supported catalysts have good fluidity and can be used in gas-phase fluidized bed polymerization, but silica-supported metallocene and non-metallocene catalysts show lower catalytic activity
[0011] Patent CN1364817 discloses the preparation method and polymerization application of magnesium chloride / silica-supported β-diketone semi-titanium metal catalyst, and its ethylene polymerization activity reaches 7.42×10 6 g polyethylene / mole titanium·hour, but there is no specific data on the granulation performance of the polymer in the patent

Method used

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  • Loaded method of Non-metallocene catalyst loaded by composite carrier and polymerizing application
  • Loaded method of Non-metallocene catalyst loaded by composite carrier and polymerizing application
  • Loaded method of Non-metallocene catalyst loaded by composite carrier and polymerizing application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] 1.1 Preparation of supported catalyst

[0136] 1.1.1 Activation of the carrier

[0137] Take ES70 type silica gel (product of Crosfield Company) and bake it under nitrogen atmosphere. The calcination conditions are: heating rate 5°C / Min, constant temperature at 200°C for 0.5h, constant temperature at 400°C for 0.5h, then constant temperature at 600°C for 4h, and finally natural cooling under nitrogen atmosphere. Recorded as ES70-650 carrier.

[0138] 1.1.2 Preparation of anhydrous magnesium chloride

[0139] Anhydrous magnesium chloride is obtained by calcining analytically pure magnesium chloride at 500°C for 3 hours in an air atmosphere.

[0140] 1.1.3 Preparation of composite carrier

[0141] Under an anhydrous and oxygen-free nitrogen atmosphere (both water and oxygen content are lower than 5ppm), weigh 1.064g of anhydrous magnesium chloride, add 30ml of tetrahydrofuran (THF), stir at 30°C for 16h, and then dropwise add 2.5ml of absolute ethanol (4A molecular s...

Embodiment 2

[0151] 2.1 Preparation of catalyst

[0152] The preparation process of the catalyst is similar to Example 1.1, take 507 mg of the composite carrier in 1.1.3, and only slowly add 5 ml of TiCl 4 hexane solution. Solution impregnation was carried out in 70 mg of non-metallocene olefin polymerization catalyst in 25 ml of toluene solution, and finally washed, filtered, dried and sucked dry.

[0153] 2.2 Aggregation

[0154] 12 mg of supported catalyst, 3 ml of concentrated MAO, and 250 ml of hexane solvent were simultaneously added into a 0.5 L autoclave, and ethylene polymerization was carried out at an ethylene pressure of 3.0 MPa. The stirring speed is 540rpm, the reaction temperature is 60°C, and the reaction time is 1.5h.

[0155] Yield: 61.52 g.

[0156] (Remove) 35.3mg of supported catalyst, 3ml of concentrated MAO and 580ml of hexane solvent were simultaneously added to a 2L autoclave, and ethylene polymerization was carried out at an ethylene pressure of 2.0MPa. The s...

Embodiment 3

[0162] Take ES-70 silica gel and keep it at 300°C for 6 hours, and record it as ES70-300 carrier.

[0163] The preparation of the catalyst is similar to Example 1.1. Among them, only 530 mg of ES70-650 was replaced with 1.0 g of ES70-300 carrier to obtain a composite carrier. Then take 0.5g of it, use 10mlTiCl 4 hexane solution treatment. Finally, 48 mg of the catalyst was weighed and dissolved in 30 ml of toluene, and the catalyst was supported by a solution impregnation method.

[0164] The polymerization process was carried out similarly to Example 1.2. With 13.6mg of supported catalyst, 3ml of concentrated MAO and 250ml of hexane solvent, ethylene polymerization was carried out at ethylene pressure of 2.0MPa, stirring speed of 510rpm and 50°C. The reaction time is 1h.

[0165] Yield: 25.18 g, polyethylene melting point 142.33°C.

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Abstract

A process for carrying the non-metallocene catalyst by composite carrier includes such steps as thermally activating silica gel, reacting on the solution of magnesium chloride in tetrahydrofuran-alcohol solution to obtain composite carrier, reacting on chemical treating agent to obtain modified composite carrier and carrying non-metallocene catalyst by solution method or dipping method. Said catalyst can be used for the homopolymerization or copolymerization of C2-C10 olefin, styrene, or ethylene.

Description

technical field [0001] The present invention is a preparation method of a non-metallocene olefin polymerization catalyst supported by a composite carrier, and its application in the process of olefin polymerization and copolymerization, especially for the homopolymerization of ethylene or the copolymerization of ethylene and other α-olefins, belonging to Catalyst loading technology and technical field of olefin polymerization. Background technique [0002] Homogeneous transition metal catalysts known to be highly active in olefin polymerization, such as unsupported Ziegler-Natta catalysts, metallocene olefin polymerization catalysts, constrained geometry olefin polymerization catalysts or non-metallocene olefin polymerization catalyst. Among them, the Ziegler-Natta catalyst is a multi-active-center olefin polymerization catalyst, and the latter three are single-active-center olefin polymerization catalysts. Metallocene olefin polymerization cataly...

Claims

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Application Information

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IPC IPC(8): C08F4/02C08F10/00
Inventor 戴厚良李传峰李晓强姚小利张玉明唐勇黎地柏基业王亚明马忠林朱维平王兴仁王聪张玉良孙秀丽胡蔚秋
Owner SINOPEC YANGZI PETROCHEM
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