Sol gel functionalized silicate catalyst and scavenger

A catalyst, silicate technology, applied in physical/chemical process catalysts, molecular sieve catalysts, catalyst activation/preparation, etc., can solve problems such as economic infeasibility, metal removal, product loss, etc.
CN101166573AInactive Publication Date: 2008-04-23QUEENS UNIV OF KINGSTON
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QUEENS UNIV OF KINGSTON
Publication Date
2008-04-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to materials suitable as metal scavengers and catalysts. The materials are prepared by functionalizing silicate materials such as silica or SBA-15 with a thiol or amine, or other functionalizing agent, in a sol gel process. In a preferred embodiment, the metal is palladium and the functionalizing agent is a thiol. The material may be used as a catalyst for the Suzuki-Miyaura and Mizoroki-Heck coupling reactions. The catalyst materials have extremely low metal leaching, are very stable, and are completely recyclable.
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Description

[0001] related application

[0002] This application claims priority from US Patent Application Serial No. 60 / 658,579, filed March 7, 2005, the entire contents of which are hereby incorporated by reference. technical field

[0003] The present invention relates to a class of metal catalysts and scavengers for removing metals in aqueous and organic solutions. More particularly, the present invention relates to a class of metal catalysts based on functionalized solid phase supports, which are prepared by a sol-gel method. Background technique

[0004] Metal-catalyzed reactions have become part of the standard approach to the synthesis of organic chemicals (see Diederich et al., 1998). For example, palladium catalysts are used to catalyze coupling reactions like the Mizoroki-Heck reaction and the Suzuki-Miyaura reaction, and provide a one-step method for constructing complex structures, such as those employed in pharmaceutical products. Metal-catalyzed reactions can also be u...

Claims

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