Subbotina, Elena published the artcileZeolite-Assisted Lignin-First Fractionation of Lignocellulose: Overcoming Lignin Recondensation through Shape-Selective Catalysis, Computed Properties of 539-88-8, the main research area is zeolite catalyst lignin fractionation lignocellulose wood hemicellulose; biomass; depolymerization; heterogeneous catalysis; lignin; zeolites.
Organosolv pulping releases reactive monomers from both lignin and hemicellulose by the cleavage of weak C-O bonds. These monomers recombine to form undesired polymers through the formation of recalcitrant C-C bonds. Different strategies were developed to prevent this process by stabilizing the reactive monomers (i.e., lignin-first approaches). To date, all reported approaches rely on the addition of capping agents or metal-catalyzed stabilization reactions, which usually require high pressures of hydrogen gas. Herein, a metal- and additive-free approach is reported that uses zeolites as acid catalysts to convert the reactive monomers into more stable derivatives under organosolv pulping conditions. Experiments with model lignin compounds showed that the recondensation of aldehydes and allylic alcs. produced by the cleavage of β-O-4′ bonds was efficiently inhibited by the use of protonic β zeolite. By applying a zeolite with a preferred pore size, the bimol. reactions of reactive monomers were effectively inhibited, resulting in stable and valuable monophenolics. The developed methodol. was further extended to birch wood to yield monophenolic compounds and value-added products from carbohydrates.
ChemSusChem published new progress about Birch wood. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics