Heterogeneous Catalysis in MCRs

Heterogeneous catalysis is really interesting not only because of multiphasic systems intriguing characteristics but also because the catalysts are easy to recover and reuse. Reusable catalysts bring economic advantages to the table they can reduce the costs of the reaction since they can be reutilized in subsequent reactions. 

The most common strategy for synthesizing reusable catalysts is attaching the desired catalyst to a specific support, such as resin or silica, which makes them insoluble in many solvents. These supports do not degrade in solutions, allowing them to be separated easily by filtration at the end of the reaction and then reused in a subsequent reaction. A similar method is to use catalysts that are not soluble in the reaction media. Where, again, a simple filtration process is all that is required to separate the catalysts. 

SCHEME 1.6 MCR using reusable magnetic particles as the catalyst [63a], 

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