Selective and efficient bifunctional and trifunctional nanoporous catalysts and methods of synthesis thereof

摘要

Selective and efficient multifunctional nanoporous catalysts containing spatially distributed organoamine and silanol groups, and methods of preparation thereof. The catalysts have been observed to be very highly efficient in catalysis of the Henry reaction.

主权项

1. A method of making a catalyst, the method comprising:
a) providing a solid particulate silicate MCM-41 mesoporous substrate having surface silanol groups that define available sites for postgrafting with catalytic functional groups; b) stirring a weight of the solid particulate silicate MCM-41 mesoporous substrate in ethanol in a first vessel; c) heating the weight of the solid particulate silicate MCM-41 mesoporous substrate in ethanol in the first vessel to a reflux temperature of 78° C. and adding a weight of 3-aminopropylsilane with stirring; d) maintaining the first vessel at the reflux temperature of 78° C. for a refluxing duration to cause postgrafting of 3-aminopropyl groups onto a portion of the available sites of the solid particulate silicate MCM-41 mesoporous substrate to form first solid particulate catalyst in the ethanol, the postgrafted 3-aminopropyl groups replacing between 6 and 15 percent of the surface silanol groups defining the available sites, and the remainder of surface silanol groups remaining as available sites.