Catalyst component used for ethylene polymerization, preparation method and application thereof

A technology for ethylene polymerization and catalyst, which is applied in the field of supported chromium-based catalyst components, and can solve problems such as no disclosure of chromium-based catalyst systems.
CN106467583AActive Publication Date: 2017-03-01CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-03-01

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Abstract

The invention provides a catalyst component used for ethylene polymerization, which comprises a chromium compound, an organic aluminum compound and an organic boron compound loaded on a carrier, and the organic boron compound contains a B-R0-B structure. The invention also provides a preparation method of the catalyst component, and an ethylene polymerization catalyst based on the catalyst component, the catalyst has good polymerization activity when used for ethylene homopolymerization or ethylene and alpha-alkene copolymerization, and can obtain the polyethylene with wide molecular weight distribution.
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Description

technical field

[0001] The invention relates to a supported chromium series catalyst component, a preparation method of the catalyst component and its application in ethylene polymerization. Background technique

[0002] Ethylene polymers have been widely used as various articles, and ethylene polymers are required to have different properties depending on processing methods and purposes. For example, polymers with lower molecular weights and narrow molecular weight distributions are suitable for articles made into films by injection molding. On the other hand, polymers with higher molecular weight and broad molecular weight distribution are suitable for articles made into films by blown or air-filled film processes. Medium to high molecular weight polyethylenes with sufficient strength and good processability are required in many applications such as pipe applications.

[0003] Ethylene polymers with a broad molecular weight distribution can be prepared using chromium-bas...

Claims

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