Tropine alkenyl rare earth metal catalyst, preparation method and application thereof

Abstract

The invention discloses a tropine alkenyl rare earth metal catalyst, a preparation method and application thereof, belonging to the field of catalysts. The catalyst has two structural formulas. The preparation method comprises the steps of firstly, heating and reacting a mixed solution of tropine, glacial acetic acid and concentrated sulfuric acid for a period of time in the atmosphere of nitrogen or argon, regulating pH value to 13-14, adding a good solvent, drying and filtering an organic phase; taking liquid, distilling at normal pressure and collecting fraction at 165-170 DEG C, or distilling at reduced pressure, collecting fraction at 80-100 DEG C so as to obtain a tropine alkenyl ligand; then dropwise adding the tropine alkenyl ligand into a solution in which a metal source is dissolved, stirring and reacting for a period of time at room temperature; filtering, concentrating and recrystallizing so as to obtain the tropine alkenyl rare earth metal catalyst. The raw materials of the catalyst are easily available, the catalyst can be used for homopolymerization and copolymerization of olefin, alkyne and polar monomers, or copolymerization of each of olefin, alkyne and polar monomers with CO2; and the preparation method is simple, economical and environment-friendly, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a tropine alkenyl rare earth metal catalyst, a preparation method and an application, and belongs to the technical field of catalysts. Background technique [0002] At present, the catalytic systems used in industry for directional polymerization of olefins can be mainly divided into three categories, namely lithium-based catalysts, titanium-based catalysts and rare earth-based catalysts. Compared with traditional lithium-based and titanium-based catalysts, rare earth metal catalysts react in a homogeneous phase, and are easy to add to the system and easy to measure accurately; the process is simple and does not require catalyst deactivation and removal; the catalyst has high activity, less dosage and is easy to disperse; The relative molecular mass distribution is easy to adjust; the polymer gel content is low, the ash content is low, etc. Therefore, rare earth metal catalysts are the mainstream development direction of polyme...

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Problems solved by technology

Although 1-trimethyltintropine reacts easily with transition metal halides, the reaction is also accompanied by the generation of toxic volatile trimethyltin halides, and the overall reaction takes a long time, making this method unsuitable. Possess the possibility of adapting to the large-scale industrialization process, therefore, those skilled in the art urgently need to find a more economical, environmentally friendly and suitable method for the preparation of tropine-based metal complexes

At present, there are no reports on tropine alkenyl rare earth metal catalysts, preparation methods and their applications in polymerization reactions.

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