Catalysis with Doped Sol-Gel Silicates

Silicates doped with catalytic species have only been slowly adopted by the fine chemicals and pharmaceutical industries, in spite of their remarkable and unique properties such as pronounced physical and chemical stability; high (enantio)selective activity and ease of materials production and application. This is now changing thanks to stricter safety regulations and to concomitant success of the first commercial catalysts. In this account we tell the story of these materials and identify some deficiencies in the innovation process that may serve as lesson in guiding the future management of innovation in these relevant industries

Enhanced Heterogeneous Catalytic Conversion of Furfuryl Alcohol into Butyl Levulinate

We study the catalytic condensation of furfuryl alcohol with 1‐butanol to butyl levulinate. A screening of several commercial and as‐synthesized solid acid catalysts shows that propylsulfonic acid‐functionalized mesoporous silica outperforms the state‐of‐the‐art phosphotungstate acid catalysts. The catalyst is prepared via template‐assisted sol‐gel polycondensation of TEOS and MPTMS. It gives 96 % yield (and 100 % selectivity) of butyl levulinate in 4 h at 110 °C. Reaction profiles before and after a hot filtration test confirm that the active catalytic species do not leach into the solution. The catalyst synthesis, characterization, and mode of operation are presented and discussed