Conversion of dihydroxyacetone to methyl lactate catalyzed by highly active hierarchical Sn-USY at room temperature

Abstract

Hierarchical Sn-USY zeolites are highly active and selective for the conversion of dihydroxyacetone to methyl lactate.

High‐Yield Synthesis of Ethyl Lactate with Mesoporous Tin Silicate Catalysts Prepared by an Aerosol‐Assisted Sol–Gel Process

“…A direct comparison with other active catalysts reported previously is difficult because of the different reaction conditions in terms of temperature, reaction time, loading of active sites, alcohol used, substrate to catalyst ratio and so on. However, SnSi‐74 displays a better performance in terms of TON than other basic Sn catalysts such as Sn‐USY (TON=58, calculated for the reaction between DHA and methanol, at 90 °C, conversion after 5 h) and Sn‐beta (TON=120, calculated for the reaction between DHA and methanol at 80 °C, conversion after 24 h). As indicated by the characterisation data, the superior activity of the aerosol catalyst may be attributed to the good Sn dispersion and its effective incorporation in the silica network, which generates abundant surface acid sites.…”

Tin-containing silicates: identification of a glycolytic pathway via 3-deoxyglucosone

“…29,30 This approach, which can also include deboronation or desilication, has expanded the accessible framework types, in which tin can successfully and with relative ease be incorporated (Sn-MWW, Sn-USY, etc.). [31][32][33][34] Changes in pore dimensions of various silicates can result in a complete change in product selectivity as recently shown by De Clercq et al 35 Despite of the great interest in catalytic glucose conversion to produce lactates, mechanistic details of the conversion and its modulation by co-solutes have remained sparse. The catalytic cascade involved in the conversion of sugars using Sn-Beta can be compared to its biological counterpart, the Embden-Meyerhof-Parnas glycolysis (EMP).…”

Catalytic Upgrading of Biomass‐Derived Sugars with Acidic Nanoporous Materials: Structural Role in Carbon‐Chain Length Variation

“…In addition to beta‐type zeolites, the incorporation of Sn into H‐USY, as reported by Yang et al., yielded Sn‐USY‐8 with a 0.05 molar ratio of Brønsted to Lewis acid sites, giving a 97 % yield of ML from DHA at 40 °C after 5 h (Table , entry 14). Likewise, an extrasmall porous Sn‐containing silicate catalyst (i.e., XS‐Sn‐MCM‐41) was prepared and developed for DHA‐to‐EL conversion.…”