Nano magnetic microsphere supported tempo catalyst and its synthesis method and application

A nano-magnetic and synthetic method technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of increased reaction costs, instability of inorganic magnetic nanoparticles, Issues such as reunion and aggregation
CN104096593BActive Publication Date: 2016-04-13ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Publication Date
2016-04-13

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Abstract

The invention discloses a nano magnetic microsphere supported TEMPO catalyst and a synthetic method and application thereof. The structure of the catalyst is shown as a formula (I-1) or formula (I-2); the catalyst (I-1) is composed of a nano magnetic microsphere (II), a linking group A and a catalyst TEMPO; one end of the linking group A is connected with C* of the nano magnetic microsphere II, and the other end is connected with the catalyst TEMPO; the linking group A is selected from the groups shown as A (1), (2), (3) and (4); the cationic part (III) of the catalyst (I-2) is obtained by connecting the linking group (IV) and the C* of the nano magnetic microsphere (II); the nano magnetic microsphere (II) is formed by wrapping a polystyrene-poly p-chloromethyl styrene copolymer coating layer outside the nano Fe3O4 magnetic core. The catalyst involved in the invention can be used in the oxidation of alcohols. The catalyst provided by the invention does not agglomerate or coagulate in the preparation and reaction process, has significantly increased catalytic activity and phase transfer catalytic function.
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Description

technical field

[0001] The invention relates to a nano-magnetic microsphere-loaded TEMPO catalyst, a synthesis method and application thereof. technical background

[0002] The selective oxidation of alcohols to corresponding carbonyl compounds such as ketones and aldehydes is one of the most important chemical reactions in industrial synthesis and laboratory research. Traditional alcohol oxidation methods mainly use stoichiometric high-valence transition metal salts (such as Collin’s reagent Cr(IV)) or organic oxides. This type of oxidant has high cost, low selectivity, and heavy metal pollutants will be generated during the reaction process. As resource and environmental issues become increasingly prominent, the research and development of green and efficient non-heavy metal oxidants and catalysts has become a hot spot in alcohol oxidation reactions.

[0003] 2,2,6,6-Tetramethylpiperidine-nitrogen-oxide (TEMPO) is used as free radical scavenger, polymerization inhibitor, ...

Claims

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