95441 20240124152520.0 doi 10.1021/acsomega.9b03147 sideral 116384 ART-2020-116384 eng Angulo, Beatriz Comparison of chemical and enzymatic methods for the transesterification of waste fish oil fatty ethyl esters with different alcohols 2020 Access copy available to the general public Unrestricted Fatty acid esters of 2-ethyl-1-hexanol (EH), 2-hexyl-1-decanol (HD), and isopropanol have been obtained from a mixture of ethyl esters obtained as a fish oil byproduct. Homogeneous base catalysis with alkaline hydroxides and alkoxides has been compared with the use of two commercially available immobilized lipases. The enzymatic methodology is more efficient in the case of the largest alcohol (HD) mainly because of the high stability of the immobilized enzymes upon recovery and reuse. In contrast, the use of a base as a catalyst is highly favorable in the case of isopropanol because of the rather poor activity of the lipases and the low price of the bases. With EH, the activity of lipases is good but the recoverability is not as efficient; hence, basic catalysts are again the most attractive alternative. The mixtures of esters obtained may be useful as hydraulic liquids given their viscosity values. info:eu-repo/grantAgreement/ES/DGA/E37-17R info:eu-repo/grantAgreement/ES/MICINN/RTI2018-093431-B-100 info:eu-repo/grantAgreement/ES/UZ/OTRI-2015-0231 info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 3.512 2020 CHEMISTRY, MULTIDISCIPLINARY 78 / 178 = 0.438 2020 Q2 T2 0.779 2020 Chemistry (miscellaneous) 2020 Q1 Chemical Engineering (miscellaneous) 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Fraile, José M. Universidad de Zaragoza (orcid)0000-0002-0136-5138 Gil, Laura Herrerías, Clara I. Universidad de Zaragoza (orcid)0000-0002-7272-8506 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 5, 3 (2020), 1479-1487 ACS Omega ACS OMEGA 2470-1343 2804424 http://zaguan.unizar.es/record/95441/files/texto_completo.pdf Versión publicada 111404 http://zaguan.unizar.es/record/95441/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:95441 articulos driver 2024-01-24-15:17:02 ARTICLE