Guo, Haixin published the artcileHydrogen gas-free processes for single-step preparation of transition-metal bifunctional catalysts and one-pot γ-valerolactone synthesis in supercritical CO2-ionic liquid systems, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is carbon transition metal bifunctional catalyst valerolactone one pot synthesis.
Hydrothermal carbonization of glucose (180 °C, 4 h) with 5-sulfosalicylic acid and nickel or copper sulfate afforded transition-metal (Ni/NiO, Cu/CuO) functional carbon (FC) catalysts in a single-step without hydrogen gas. Hydrogenation of levulinic acid to γ-valerolactone (GVL) in supercritical carbon dioxide (scCO2)-ionic liquid ([BMIM]Cl) systems with formic acid as H-donor source and Ni/NiO-FC catalysts gave 97% GVL yields (170 °C, 3 h). The Ni/NiO-FC catalysts (d = 50 to 200 nm) had well-dispersed Ni/NiO particles (<5 nm) with -SO3H, COOH and phenolic -OH functional groups; Ni/NiO-FC catalysts were more effective than Cu/CuO-FC catalysts. Ni/NiO-FC catalysts were active for conversion of substrates (Et levulinate, fructose, cellobiose or cellulose) to resp. products (GVL, 5-HMF, sugars). The role of scCO2 in the reaction system is one of improving mass transport and suppressing side-reactions via GVL product removal. Proposed methods for catalyst synthesis and substrate hydrogenation do not require hydrogen gas and are widely applicable to processing biomass. Journal of Supercritical Fluids published new progress about Adsorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Recommanded Product: Ethyl 4-oxopentanoate.
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