Magnetic palladium composite catalyst, and preparation method and use thereof

A composite catalyst and magnetic technology, applied in organic chemistry methods, carbon-based compound preparation, chemical instruments and methods, etc., can solve the problems of low catalytic performance and recycling efficiency of materials, and achieve the effect of improving separation efficiency.
CN104785301AInactive Publication Date: 2015-07-22SUZHOU TOKIND CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU TOKIND CHEM CO LTD
Publication Date
2015-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a magnetic palladium composite catalyst, and a preparation method and a use thereof. The magnetic palladium composite catalyst adopts superparamagnetic Fe3O4@SiO2 microspheres as a carrier, the surface is covalently modified with supported amino Pd (II) particles, and the catalyst is obtained through the steps of sequentially preparing Fe3O4 nanoparticles, preparing core-shell structured magnetic nanometer microspheres Fe3O4@SiO2 and preparing a Fe3O4@SiO2 supported amino ligand. The magnetic amino palladium composite catalyst can be applied in a Suzuki reaction, can realize approaching equal conversion of halobenzene with an electron donating group or an electron withdrawing group, and has unobvious decreasing activity after the catalyst is continuously used 5 times due to no obvious decrease of the supported amount of an active ingredient.
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Description

technical field

[0001] The invention relates to a nanometer precious metal catalyst, in particular to a magnetic recyclable palladium composite catalyst and its preparation method and application, belonging to the technical field of precious metal catalysts in material science. Background technique

[0002] Homogeneous noble metal catalysts have the advantages of high reactivity, strong controllability, and good catalytic selectivity. They are widely used in organic coupling reactions such as Suzuki and Heck reactions, but they are difficult to recycle, easy to deactivate, and easy to cause environmental pollution. Disadvantages such as pollution, this is an urgent problem to be solved in industrial production. It is a feasible way to use heterogeneous noble metal catalysts instead of homogeneous catalysts to achieve catalyst recovery, but how to improve the catalytic performance and recovery efficiency of heterogeneous catalysts is the key point. Magnetic nanoparticle cata...

Claims

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