Goda, Mohamed Nady published the artcileMineral acid-activated sugarcane bagasse ash as solid acid catalyst for the liquid phase esterification of acetic acid with n-amyl, benzyl, and n-butyl alcohols, Formula: C9H10O2, the main research area is acetic acid amyl benzyl butyl alc sugarcane bagasse esterification.
Liquid phase esterification of carboxylic acids with alcs. is an important organic synthesis process in the petrochem. and fine chem. industries. These reactions required mineral acid catalysts, which are corrosive and difficult to be separated from the reaction mixture Therefore, the use of solid acid catalysts is economically viable, reusable, and environmentally amicable. In this study, sugarcane bagasse ash (SCBA) was impregnated with 1-10 weight% of sulfuric acid (H2SO4) or perchloric acid (HClO4) for the liquid-phase esterification of acetic acid with n-amyl, benzyl, and Bu alcs. under various reaction conditions. The catalysts were characterized using X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier-transform IR (FTIR), N2 sorption, and SEM. Their acidities were measured through the dehydration of iso-Pr alc. and pyridine adsorption FTIR. The effects of the acid activation of SCBA on its texture properties (such as surface area and the nature of the surface functional groups), acidity, and catalytic activity were studied in detail. FTIR of the pre-saturated catalysts with pyridine reflected the presence of Bronsted and Lewis acid sites. The concentrations of the acid sites were improved by increasing the percentages of acid loading. All the catalysts showed high catalytic activity with 100% selectivity to ester formation. The catalyst pretreated with H2SO4 showed the higher ester yields compared to that of treated with HClO4. The optimum reaction conditions were a reaction time of 2 h, an alc.-to-acid molar ratio of 1:3, and catalyst loading of 0.5 g. The highest yields of n-amyl acetate, benzyl acetate, and Bu acetate of 98, 90.8, and 70.5%, resp., were achieved over the SCBA pretreated with 10 weight% H2SO4 catalyst. The high catalytic performance of this catalyst is due to the high surface acidity generated by the inductive effect of the S=O bond.
Journal of Environmental Chemical Engineering published new progress about Adsorption. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Formula: C9H10O2.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics