Da Silva, Marcio Jose published the artcileEsterification of levulinic acid over Sn(II) exchanged Keggin heteropolyacid salts: An efficient route to obtain bioadditives, HPLC of Formula: 539-88-8, the main research area is esterification levulinate tin exchanged Keggin heteropolyacid bioadditive.
In this paper, we describe a process to add value to the biomass derivatives (i.e., levulinic acid), converting it to bioadditives over solid Sn(II) exchanged Keggin heteropolyacid salts. These solid catalysts are an attractive alternative to the traditional soluble and corrosive Bronsted acid catalysts. Among Sn(II) heteropoly salts, the Sn1.5PW12O40 was the most active and selective catalyst, achieving high conversions (ca. 90%) and selectivity (90-97%) for alkyl esters and angelica lactone, the main reaction products. The impacts of the main reaction parameters (i.e., catalyst load, temperature, and the molar ratio of alc. to acid) were investigated. The use of renewable raw material, and an efficient and recyclable catalyst are the main pos. features of this process. The Sn1.5PW12O40 catalyst was easily recovered and reused without loss activity.
Molecular Catalysis published new progress about Esterification. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, HPLC of Formula: 539-88-8.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics