Characterization and activity of zinc acetate complex supported over functionalized silica as a catalyst for the production of isopropyl palmitate

Production of isopropyl palmitate in a catalytic distillation column: Experimental studies

“…The catalyst, zinc acetate supported on silica gel, was synthesized using sol gel method. The details for the catalyst preparation, characterization and activity have been reported elsewhere (Chin et al, 2006).…”

Zirconium-containing metal organic frameworks as solid acid catalysts for the esterification of free fatty acids: Synthesis of biodiesel and other compounds of interest

“…For comparison, time-conversions attained with other homogeneous (H 2 SO 4 ) and heterogeneous (zinc acetate supported on succinic acid-modified SiO 2 as reported in [46]) catalysts are also included in the same plot. As it can be seen, the activity of the UiO material is comparable with that of H 2 SO 4 measured in the same conditions in our lab, while it clearly outperform the results obtained with the supported zinc acetate (although in this case the amount of catalyst used was sensibly lower: 0.2 mol% versus 8 mol% in the present study).…”

“…< Insert Figure 4 near here> Another product of interest that can be obtained by esterification of free fatty acids is isopropyl palmitate, obtained from palmitic acid and isopropanol. This compound is a dry and soft emollient with good adsorption characteristics used in cosmetics [45], lubricants and is an excellent solvent for mineral oil, silicone and lanolin [46].…”

Kinetics of the esterification of palmitic acid with methanol catalyzed by 12-tungstophosphoric acid supported on ZrO2

“…In both models, the adsorptions of the polar molecules, water, methanol and palmitic acid were considered to be stronger than the adsorption of methyl palmitate and hence the adsorption term for methyl palmitate was neglected in the LHHW and ER models. As proposed by Chin et al [34], a general rate expression for the three models considered could be written as follows:…”

“…The kinetics of the esterification reaction can be expressed using the simple pseudohomogeneous (PH) model or more complex models based on the LangmuirHinshelwood Hougen Watson (LHHW) mechanism or the Eley-Rideal (ER) mechanism in the absence of any intraparticle diffusional limitation [31][32][33][34]. These models were applied for correlating the kinetic data obtained at different reaction temperatures, catalyst loadings and feed molar ratios of methanol to palmitic acid.…”