Determinación de los parámetros Cinéticos en la síntesis de resina alquídica a partir de policondensación con anhidrido Ftálico y Etilenglicol.

Abstract

Palm oil (Elais guineensis) is used in the food industry and biofuel production, although it is not limited to these two purposes. There is now a tendency to give added value and one of the options is the production of alkyd resins, as a source of fatty acids in the production of monoglycerides. Obtaining alkyd resins it is given by the polyesterification reaction between polybasic acids with polyhydric alcohols, with the use of oils as modifiers. Bibliographically data on the kinetics of reactions of this type are rare and very difficult to access. In this project the kinetic parameters were determined in alkyd resin production of palm oil from the polycondensation with ethylene glycol, phthalic anhydride and monoglycerides. The process for determining these parameters followed a protocol to the next character: oil characterization, formulation of alkyd resin synthesis of the alkyd resin, characterization of the resin and final determination of kinetic and modeling parameters in Matlab ®. In the synthesis process, the sampling for determination of rate constants and reaction orders, was consecutively every 5 minutes during the first 15 minutes from time 0 reaction after this a final sample was taken at the end the reaction since past the first 15 minutes the reaction tends to a linear behavior. In turn the acid value measurements to have control progress of the reaction were conducted. Once this process determined quantities of ethylene glycol, phthalic anhydride, fatty acids and glycerol in each sample, from these data is stoichiometrically calculated production of monomers A and B, and the production of alkyd resin from the water generated experimentally. Calculations order reaction rate constants were performed using the general equation for order n involving both parameters. The order of reaction for phthalic anhydride was 2 at the beginning of the reaction and decreases to an order of 1.5 at the end of this. Ethylene glycol and monoglyceride had similar behaviors as the reaction orders were 1.8 and 1.7 respectively of the beginning of the reaction and a final order of 1 for both reagents are proposed. The modeling algorithm kinetic Monte Carlo method, from these data, resulted in a prediction of behavior that fits the experimental data. The use of this method in the verification of kinetic parameters makes it a powerful tool and easily understood.