Resumen-Se pretende añadir valor agregado a las algas pardas (Pheophyta/Padina) ecuatorianas empleándolas como recursos para la producción de ácidos orgánicos y alginato de sodio de manera que se evidencie una fuente alternativa de materia prima en la petroquímica. Basado en el trabajo de Mazumder se determinaron las condiciones para la extracción alginato de sodio empleando agua de mar y concentración de catalizador (Na2CO3) al 0% ,1.5% y 3%; el valor del mejor rendimiento fue de 27,34%. Así como también para la obtención de ácidos orgánicos (ácido láctico y acético) basado en el trabajo de Jeon, se empleó metodología de superficie de respuesta (MSR); para lo cual se empleó agua de mar para dos rutas: con alginato de sodio procedente de Sigma Aldrich y con algas pardas ecuatorianas pre-tratadas. El diseño experimental de Box Behken tiene como factores a la temperatura, tiempo de digestión, salinidad del agua y cantidad de catalizador (CaO). El mayor rendimiento obtenido en el estudio para ácido láctico y acético fue del 30,54% y 5,872% respectivamente. Los productos extraídos se analizaron mediante: Espectroscopia infrarroja con transformada de Fourier (IFTR-ATR), Análisis Termogravimétrico (TGA) y el Escaneo Calorimétrico Diferencial (DSC), para el alginato de sodio; así como para los ácidos orgánicos, Espectrofotometría de Movilidad Iónica (GC-IMS). Palabras Claves-Ácidos Orgánicos, Agua de Mar, Algas Pardas, Alginato de Sodio.Abstract-It is intended to add added value to Ecuadorian brown algae (Pheophyta / Padina) by using them as resources for the production of organic acids and sodium alginate in order to demonstrate an alternative source of raw material in the petrochemical industry. Based on the work of Mazumder, the conditions for the extraction of sodium alginate using seawater and concentration of catalyst (Na2CO3) at 0%, 1.5% and 3% were determined; the value of the best performance was 27.34%. As well as for obtaining organic acids (lactic and acetic acid) based on Jeon's work, surface response methodology (MSR) was used; for which seawater was used for two routes: with sodium alginate from Sigma Aldrich and with pre-treated brown seaweed from Ecuador. The experimental design of Box Behken has as factors the temperature, digestion time, water salinity and amount of catalyst (CaO). The highest yield obtained in the study for lactic acid and acetic acid was 30.54% and 5.872% respectively. The extracted products were analyzed by: Fourier transform infrared spectroscopy (IFTR-ATR), Thermogravimetric Analysis (TGA) and Differential Calorimetric Scanning (DSC), for sodium alginate; as well as for organic acids, Ion Mobility Spectrophotometry (GC-IMS).
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