Application of Steapsin lipase for bioconversion of glycerol acetates from glycerol

Britto, Pradima J.; Kulkarni, Rajeswari M.; Veluturla, Sravanthi; Narula, Archna

doi:10.1016/j.bcab.2023.102641

Cited by 3 publications

(1 citation statement)

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“…It is crucial for many industries where glycerol is used as an intermediate compound to obtain added-value products by biochemical, chemical, thermochemical, or catalytic routes. This mainly focuses on the dehydration of glycerol to acrolein (an important chemical intermediate in many industries) [1][2][3], polymerization of glycerol to polyglycerols (surfactants used in the food, detergents, and cosmetics industries) [4][5][6][7], esterification to acylated esters -glyceryl diacetate, glyceryl triacetate (oxygenated fuel additives) [8][9][10], hydrogenolysis of glycerol to propandiol (an important intermediate in the polymer industry) [11][12][13], condensation with carbonyl groups to acetals and ketals (antiknock additives in combustion engines, oxygenated fuel additive, surfactant, and flavoring agent) [14], carboxylation to glycerol carbonate (electrolyte and solvent in batteries) [15,16], and the steam reforming of glycerol to hydrogen (fuel) [17][18][19]. Among them, the condensation of glycerol with carbonyl compounds (ketones and aldehydes) is one of the common glycerol valorization routes described in the literature because valuable cyclic acetals/ketals for various industries are obtained with the formation of H 2 O as a non-toxic co-product.…”

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confidence: 99%

An Evaluation of Glycerol Acetalization with Benzaldehyde over a Ferromagnetic Heteropolyacid Catalyst

et al. 2023

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Tungstophosphoric acid (H3PW12O40) supported on silica-coated magnetite nanoparticles has been prepared and used as a heterogeneous acid catalyst (Fe3O4@SiO2@HPW) in the condensation of benzaldehyde (B) with glycerol (Gly) for the production of cyclic acetals. Physicochemical techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectrometry (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and N2 physisorption were used to characterize the prepared catalyst. The effect of glycerol/benzaldehyde molar ratio (1/1 to 1/1.2), temperature (80–120 °C), and catalyst amount (1–5%) on glycerol conversion and the selectivity in main reaction products: benzoic acid, 2-phenyl-1,3-dioxolan-4-yl)methanol, 2-Phenyl-1,3-dioxan-5-ol, 2-phenyl-1,3-dioxolane, and methyl 2-hydroxy-3-phenylpropanoate was studied to evaluate the catalytic activity of the prepared Fe3O4@SiO2@HPW catalyst. The optimization of these process parameters was conducted using Box–Behnken design (BBD). Using the BBD methodology, the optimal parameters (120 °C, 1:1.15 glycerol: benzaldehyde, 5% catalyst) were determined, for a glycerol conversion of and cyclic acetals yield of 85.95% and 78.36%, respectively. The catalyst also exhibits excellent activity for glycerol acetalization with other aromatic aldehydes such as cinnamaldehyde, p-methyl-benzaldehyde, p-hydroxy-benzaldehyde, and vanillin.

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