Spherical magnesium chloride-supported late-transition non-metallocene catalyst and preparation method thereof

Abstract

The invention belongs to the technical field of transition metal catalysts, and particularly discloses a spherical magnesium chloride-supported late-transition non-metallocene catalyst and a preparation method thereof. The spherical magnesium chloride-supported late-transition non-metallocene catalyst is prepared from the following raw materials: spherical magnesium chloride, a late-transition non-metallocene complex and an aluminum reagent. A preparation process of the catalyst comprises the following steps: S1, enabling the spherical magnesium chloride and the aluminum reagent to undergo a contact reaction, then performing suction filtering, washing and drying to obtain an aluminum reagent treated spherical magnesium chloride supporter; S2, enabling the aluminum reagent treated sphericalmagnesium chloride supporter to contact the late-transition non-metallocene complex, and stirring within a temperature range of -60 DEG C to 100 DEG C for 0.5 to 48 hours; S3, after the reaction ends, filtering, washing and drying an obtained solid, so as to obtain the spherical magnesium chloride-supported late-transition non-metallocene catalyst. The preparation method of the supported catalystdisclosed by the invention is simple and is very suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of spherical magnesium chloride-supported non-late transition metal catalysts, in particular to a spherical magnesium chloride-supported non-late transition metal catalyst and a preparation method thereof. Background technique [0002] The non-metallocene catalysts that appeared in the mid-to-late 1990s are also called "post-metallocene" olefin polymerization catalysts because the non-metallocene catalysts appeared after the metallocene catalysts in time. It has similar characteristics to metallocene catalysts, allows tailor-made polymers on demand, and is less costly. The central courtyard of non-metallocene catalysts includes almost all transition metal elements, and in some respects the performance has reached or even surpassed that of metallocene catalysts. It is called a new generation of olefin polymerization catalysts after Ziegler-Natta and metallocene catalysts. According to the difference of the c...

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Problems solved by technology

[0003] However, homogeneous catalysts have been proved to have shortcomings such as short duration of activity, easy sticking to the kettle, high amount of methyl aluminoxane, and too low or too high molecular weight for polymerization in olefin polymerization, so they can only be used for solution polymerization. process or high-pressure polymerization process, which severely limits its range of industrial applications

[0004] Patent ZL201110126431 discloses an olefin polymerization catalyst system, which has good olefin polymerization performance, but the catalyst system disclosed in this patent requires a relatively high amount of co-catalyst in the polymerization to obtain suitable olefin polymerization activity, and during the polymerization process There are phenomena such as short duration of activity and polymer sticking to the kettle

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