Carrier used for olefin polymerization catalyst and preparation method thereof

A technology of olefin polymerization and catalyst, which is applied in the field of carrier preparation, can solve problems such as instability in the preparation process of catalyst carrier, difficulty in forming spherical particles of small and large sizes, poor carrier molding effect, etc., and achieve improved hydrogen adjustment sensitivity and bulk density Moderate effect with good particle shape
CN106608941AActive Publication Date: 2017-05-03营口风光新材料股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
营口风光新材料股份有限公司
Publication Date
2017-05-03

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Abstract

The invention relates to a carrier used for an olefin polymerization catalyst and a preparation method thereof. The carrier is (MgXY)m.[Mg(OR')Z]p.(ROH)n. The preparation method comprises the following steps: mixing magnesium halide as shown in MgXY, a compound as shown in ROH and a first inert medium; carrying out heating at 90 to 150 DEG C for 0.5 to 5 h; then emulsifying a liquid-state mixture obtained in the previous step; introducing an emulsification product to a second inert medium which has been cooled to -40 to 10 DEG C for rapid cooling and forming; carrying out solid-liquid separation so as to obtain a spherical carrier; and carrying out washing and drying so as to obtain the carrier. According to the invention, a forming agent and a grain-shape controlling agent are added during formation of an alcohol adduct of magnesium halide, so the obtained carrier has more concentrated particle size distribution; the catalyst prepared from the carrier has improved activity and hydrogen sensitivity when applied to olefin polymerization, especially to propylene polymerization; and an obtained polymerization product has moderate bulk density and is almost free of special-shaped materials.
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Description

technical field

[0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for preparing a carrier for olefin polymerization catalysts. Background technique

[0002] As we all know, the carrier of Ziegler-Natta catalyst commonly used for olefin polymerization is magnesium chloride alcoholate, and its overall performance is superior to other carrier catalysts. At present, catalysts for olefin polymerization are basically prepared by loading titanium halide on magnesium chloride alcoholate. The preparation method of carrier magnesium chloride alcoholate can generally be adopted by spray drying, spray cooling, high-pressure extrusion, high-speed stirring, emulsification, etc. Forming and supergravity rotating bed and other methods. However, the problem with the alcoholate carrier prepared by these methods is that the catalyst prepared with this kind of alcoholate carrier is prone to breakage of polymer particles in the process of cat...

Claims

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