Evaluación de una propuesta para la obtención de cafeína partiendo de residuos de café generados por la industria cafetera

The main objective of this work was to develop a conceptual design proposal for the extraction of caffeine in order to take advantage these wastes that have great economic potential. Initially, 4 types of coffee waste (spent coffee, green coffee, cherry husk and coffee pulp) were collected. After its collection, properties such as humidity, ash, particle size, density, polyphenol content and caffeine were estimated in order to select two of the 4 coffee waste using a multicriteria matrix, taking into account the concentration of polyphenols, the concentration of caffeine, its value, availability and ease of extraction as evaluation criteria. Subsequently, according to the results obtained from the matrix, coffee pulp and spent coffee were selected as waste to be evaluated. Then the extraction agent and the extraction and purification method were chosen based on a Pugh matrix to extract the caffeine by means of an ultrasonic assisted extraction using a composite central design experiment, evaluating the effect of the temperature and the extraction time, finding that the optimal values were at 37 ° C and 312 minutes, achieving an extraction yield for spent coffee and coffee pulp of 90.04% and 83.30% respectively. After that, the extracted caffeine was purified by means of column chromatography to obtain a purity for coffee pulp and spent coffee of 98.43% and 98.76% respectively.

• Fecha de publicación: 2020
• Institución: Universidad de América
• Repositorio: Lumieres
• Idioma: spa
• OAI Identifier: oai:repository.uamerica.edu.co:20.500.11839/7785
• Acceso en línea: https://hdl.handle.net/20.500.11839/7785
• Palabra clave: Cafeína; Parámetros de operación; Extracción; Purificación; Caffeine; Operation parameters; Extraction; Purification; Tesis y disertaciones académicas
• License: Atribución – No comercial