Por favor, use este identificador para citar o enlazar este ítem: doi:10.1016/j.bej.2008.12.007

Título: Influence of the operating conditions on lipase-catalysed synthesis of ricinoleic acid estolides in solvent-free systems
Fecha de publicación: 16-dic-2008
Palabras clave: enzyme
immobilised
bioreactor systems
stirred tank
ricinoleic acid estolide
solvent-free
Resumen: In this work, the synthesis of ricinoleic acid estolides, also named polyricinoleic acid (PR), in two different solvent-free reaction systems, catalysed by immobilised Candida rugosa lipase is described. First, the esterification was performed in an open air jacketed batch reactor and the influence of amount of enzyme, temperature and initial water content was tested. The best results were obtained when 5 g of soaked immobilised derivative was used as biocatalyst, and the reaction was carried out at 40 ◦C. It was observed that environmental relative humidity plays an important role in the enzymatic synthesis of ricinoleic acid estolides and, given that this parameter takes on a wide range of values depending on the season, it is considered the main cause of the poor reproducibility achieved in the open air reactor. To solve this problem, the ricinoleic acid estolides were synthesised under controlled atmosphere in a vacuum reactor with dry air intake. The optimum drying time of 7 h was selected. In these conditions, PR with an acid value of 57.5mgKOH/g was synthesised in 48 h of reaction and the results were entirely reproducible.
Autor/es principal/es: Bódalo, A.
Bastida, J.
Máximo, M.F.
URI: http://hdl.handle.net/10201/113053
DOI: doi:10.1016/j.bej.2008.12.007
Tipo de documento: info:eu-repo/semantics/article
Número páginas / Extensión: 27
Derechos: info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Aparece en las colecciones:Artículos: Ingeniería Química

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