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A kind of double active component olefin polymerization catalyst and preparation method

An olefin polymerization and catalyst technology, which is applied in the field of dual-active component olefin polymerization catalyst and its preparation, can solve the problems of low bulk density and difficult shape control, and achieves the effects of good strength, good material performance and improved comprehensive performance.

Active Publication Date: 2017-08-25
ZIBO XINSU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst is based on active magnesium chloride as a carrier, the shape is not easy to control, and the bulk density is low

Method used

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  • A kind of double active component olefin polymerization catalyst and preparation method
  • A kind of double active component olefin polymerization catalyst and preparation method
  • A kind of double active component olefin polymerization catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) MgCl 2 Dissolve in ethanol solution, add dehydration activated SiO with particle size less than or equal to 1.0μm 2 , fully dispersed and sprayed to obtain a spherical composite carrier with good shape, the obtained spherical composite carrier is dealcoholized in a fluidized bed to make the MgCl in the spherical composite carrier 2 : SiO 2 : The molar ratio of ethanol is 1:1:0.1;

[0046] (2) The spherical composite carrier obtained by step (1) is dispersed in hexane, and the dispersant Ti(OBu) is added 4 , at 30°C, the carrier was pre-dispersed to obtain a suspension, and the dispersant and MgCl 2 The molar ratio is 0.01;

[0047] (3) Add N-(2,6-dimethylphenyl)-2-pyrrolemethimine to the suspension prepared in step (2), and fully react at 30°C for 0.1 hour. The N-(2 ,6-Dimethylphenyl)-2-pyrrolemethimine and MgCl 2 The molar ratio is 0.001;

[0048] (4) Add TiCl to the carrier suspension prepared in step (3) 4 and VCl 4 At 30°C, reacted for 0.5 hours, the Ti...

Embodiment 2

[0050] (1) MgCl 2 Dissolve in propanol solution, add dehydration-activated SiO with particle size less than or equal to 1.0μm 2 , fully dispersed and sprayed to obtain a spherical composite carrier with good shape, the obtained spherical composite carrier is dealcoholized in a fluidized bed to make the MgCl in the spherical composite carrier 2 : SiO 2 : Propanol molar ratio is 1:5:1;

[0051] (2) The spherical composite carrier obtained by step (1) is dispersed in heptane, and the dispersant Ti(OBu) is added 4 , at 80°C, the carrier was pre-dispersed to obtain a suspension, and the dispersant and MgCl 2 The molar ratio is 1.0;

[0052] (3) Add N-(2,6-diethylphenyl)-2-pyrrolemethimine to the suspension prepared in step (2), and fully react at 150°C for 1.5 hours. The N-(2 ,6-diethylphenyl)-2-pyrrolemethimine and MgCl 2 The molar ratio is 0.1;

[0053] (4) Add TiCl to the carrier suspension prepared in step (3) 4 and VCl 4 At 100°C for 12 hours, the TiCl 4 with MgCl 2...

Embodiment 3

[0055] (1) MgCl 2 Dissolve in butanol solution, add dehydration-activated SiO with particle size less than or equal to 1.0 μm 2 , fully dispersed and sprayed to obtain a spherical composite carrier with good shape, the obtained spherical composite carrier is dealcoholized in a fluidized bed to make the MgCl in the spherical composite carrier 2 : SiO 2 : Butanol molar ratio is 1:3:0.5;

[0056] (2) Disperse the spherical composite carrier obtained in step (1) in octane, add dispersant Ti(OBu) 4 , at 60°C, the carrier was pre-dispersed to obtain a suspension, and the dispersant and MgCl 2 The molar ratio is 0.66;

[0057] (3) Add N-(2,6-diisopropylphenyl)-2-pyrrolemethimine to the suspension prepared in step (2), and fully react at 120°C for 1.3 hours. The N-( 2,6-diisopropylphenyl)-2-pyrrolemethimine and MgCl 2 The molar ratio is 0.009;

[0058] (4) Add TiCl to the carrier suspension prepared in step (3) 4 and VCl 4 At 70°C for 11 hours, the TiCl 4 with MgCl 2 The mo...

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Abstract

The application provides a new catalyst for olefin polymerization, which includes a magnesium-containing composite carrier, a dispersant Ti(OBu)4, an electron donor compound containing a pyrrole ring, and active components VCl4 and TiCl4 . The magnesium-containing composite carrier of the catalyst is obtained by spray drying. It has a good shape and high ethylene polymerization activity. It is suitable for gas phase fluidized bed polymerization process and slurry polymerization process. It can prepare bismuth with less oligomers. Linear polyethylene with a peak or broad relative molecular weight distribution, and the obtained linear polyethylene has good material properties. The polyethylene resin prepared by using this catalyst has a bimodal or wide relative molecular weight distribution. When catalyzing the polymerization of ethylene and comonomers, a polyethylene resin containing less oligomers can be obtained. The film material blown by this resin has better properties. Excellent material performance, good strength, and high quality of dart impact damage.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a dual active component olefin polymerization catalyst and a preparation method thereof. Background technique [0002] In the process of producing high-density polyethylene (HDPE) or linear low-density polyethylene (LLDPE), it can be copolymerized with ethylene by adding unsaturated olefin comonomers with more than 3 carbon atoms (such as butene, hexene, etc.) , Reducing the density of the polymer can improve various properties of polyethylene, such as machinability, solubility, heat resistance, corrosion resistance, etc., so as to obtain a polyethylene resin with excellent comprehensive properties. [0003] Small molecule copolymers in polyethylene can provide plasticization and lubrication for polyethylene resin, reduce the crystallinity of polyethylene resin, and improve the processing performance of polyethylene resin, but at the same time it may cause the problem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/685C08F4/646C08F4/645C08F4/02
CPCY02P20/52
Inventor 张志传李德宏苏光马丽军赵晓燕
Owner ZIBO XINSU CHEM