Browsing by Author "Casas Orozco, Daniel"
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Publication Diseño de una torre de destilación batch para la recuperación de nopol proveniente de un proceso catalítico(2014) Casas Orozco, Daniel; Villa Holguín, Aída LuzPublication Efecto del solvente en la cinética de producción de nopol con SnMCM-41(2014) Casas Orozco, Daniel; Alarcón Durango, Edwin Alexis; Villa Holguín, Aída LuzPublication Kinetic study of the nopol synthesis by the Prins reaction over tin impregnated MCM-41 catalyst with ethyl acetate as solvent(2014) Casas Orozco, Daniel; Alarcón Durango, Edwin Alexis; Villa Holguín, Aída LuzThe kinetics of the catalytic synthesis of nopol from b-pinene and paraformaldehyde over Sn-MCM-41 catalyst and using ethyl acetate as solvent is presented and compared with previous studies in toluene. Reaction rate data were fitted to a kinetic expression based on the Langmuir–Hinshelwood formalism, using the initial rates method. Reaction rate constant and adsorption constants were determined by regression of experimental data. The highest adsorption constant for nopol respect to reactants (KC = 14.948 M-1) allows to explain the strong inhibition effect of this compound that is experimentally observed. Solvent effects were discussed in terms of formaldehyde solubility, solvation of activated complex and reactants, and competitive adsorption on active sites. Higher solubility of formaldehyde in ethyl acetate respect to toluene, determined with Henry’s law, along with the competitive adsorption of solvent and a more probable solvation of b-pinene and nopol may explain the better selectivity in ethyl acetate. Dependency of reaction constant on temperature was evaluated between 75°C and 90°C, resulting in an apparent activation energy of 98 kJ mol-1, which is higher than in toluene, suggesting stabilization of carbocation intermediates by solvation in the polar ethyl acetate solvent.Publication Modelado de las etapas de reacción y separación en la producción de nopol(2014) Casas Orozco, Daniel; Villa Holguín, Aída Luz; González Rodríguez, Lina María; Ochoa, SilviaPublication Modelado, simulación y optimización de un proceso para la producción de Nopol. Informe de Actividades noviembre 2014 - septiembre 2015(2015) Casas Orozco, Daniel; Villa Holguín, Aída LuzPublication Proyecto “Modeling, simulation and design of a process for the production of nopol” : Informe de actividades(2015) Casas Orozco, Daniel; Villa Holguín, Aída Luz