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Catalysts for Hydrogenation and Hydrosilylation

Stage: Prototype

Homogeneous catalysts are usually more selective than heterogeneous catalysts, but they are often difficult to recycle. This organometallic complex containing molybdenum or tungsten and not containing a precious metal can be used to catalyze the hydrogenation and/or hydrosilylation of an organic compound. At the end of the reaction, the molybdenum or tungsten precipitates and can be recovered. Mild process conditions can be used to generate the catalyst, in line with the objectives of “green chemistry.”



An organometallic complex contains Mo or W and does not contain a precious metal. The complex is capable of catalyzing hydrogenation and/or hydrosilylation of an organic compound. The catalyst precipitates from solution at the end of the reaction and can be recovered by decanting. The process of preparing the organometallic complex uses mild conditions: about 1 atm pressure and 100°C or less. The process may be performed under a range of conditions from about 1 atmosphere to about 5000 psi and between -95°C and 120°C.

Applications and Industries

Hydrogenation of aldehydes and ketones; hydrosilylation of aldehydes, ketones, and esters.

Benefits

These catalysts use less costly materials instead of precious metals, reducing catalyst cost. They are also recyclable. The catalysts have broad applicability, catalyzing hydrogenation of aldehydes and ketones and hydrosilylation of aldehydes, ketones, and esters.

Patents