Chemicals from biomass: Synthesis of lactic acid by alkaline hydrothermal conversion of sorbitol

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dc.contributor.authorRamírez-López, Camilo A.
dc.contributor.authorOchoa-Gómez, José R.
dc.contributor.authorGil-Río, Silvia
dc.contributor.authorGómez-Jiménez-Aberasturi, Olga
dc.contributor.authorTorrecilla-Soria, Jesús
dc.contributor.institutionTecnalia Research & Innovation
dc.contributor.institutionLaboratorio Químico
dc.contributor.institutionBIOECONOMÍA Y CO2
dc.contributor.institutionSG
dc.date.accessioned2024-07-24T12:09:50Z
dc.date.available2024-07-24T12:09:50Z
dc.date.issued2011-06
dc.description.abstractBACKGROUND: Currently, the 'green chemistry' philosophy is being increasingly adopted by the chemical industry and, therefore, new production procedures of valuable chemicals from biomass-derived raw materials are being sought. In this work, the synthesis of lactic acid from sorbitol under alkaline hydrothermal conditions is investigated by analyzing the influence on conversions and yields of temperature, NaOH/sorbitol molar ratio (MR), initial sorbitol concentration (SC) and reaction time. RESULTS: A 100% sorbitol conversion and a maximum 39.5% yield of lactic acid on a carbon basis are obtained at 280 °C, 50 min, 1.0 mol L-1 SC and 2.0 MR. Glyceraldehyde was the only identified intermediate while formic acid, acrylic acid, acetic acid, oxalic acid and sodium carbonate were identified as over-oxidation products, all of them in very low yields with the exception of formic acid (16% yield at a MR of 4 and 280 °C). Several plausible conversion routes of sorbitol involving dehydrations, keto-enol tautomerisms, reverse aldol condensations, aldol condensations, Cannizzaro reactions and oxidations are proposed. CONCLUSIONS: Considering the high number of parallel conversion routes as a consequence of high functionality of sorbitol, the 39.5% lactic acid yield obtained is a good result. Total carbon mass in all identified products only justifies, at most, 50% of that in sorbitol due to the coexistence of several conversion routes resulting in a large number of products other than lactic acid.en
dc.description.statusPeer reviewed
dc.format.extent8
dc.identifier.citationRamírez-López , C A , Ochoa-Gómez , J R , Gil-Río , S , Gómez-Jiménez-Aberasturi , O & Torrecilla-Soria , J 2011 , ' Chemicals from biomass : Synthesis of lactic acid by alkaline hydrothermal conversion of sorbitol ' , Journal of Chemical Technology and Biotechnology , vol. 86 , no. 6 , pp. 867-874 . https://doi.org/10.1002/jctb.2602
dc.identifier.doi10.1002/jctb.2602
dc.identifier.issn0268-2575
dc.identifier.urihttps://hdl.handle.net/11556/4015
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=79955978048&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofJournal of Chemical Technology and Biotechnology
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsChemicals from biomass
dc.subject.keywordsHydrothermal conversion
dc.subject.keywordsLactic acid
dc.subject.keywordsSorbitol
dc.subject.keywordsBiotechnology
dc.subject.keywordsGeneral Chemical Engineering
dc.subject.keywordsRenewable Energy, Sustainability and the Environment
dc.subject.keywordsFuel Technology
dc.subject.keywordsWaste Management and Disposal
dc.subject.keywordsPollution
dc.subject.keywordsOrganic Chemistry
dc.subject.keywordsInorganic Chemistry
dc.subject.keywordsSDG 7 - Affordable and Clean Energy
dc.titleChemicals from biomass: Synthesis of lactic acid by alkaline hydrothermal conversion of sorbitolen
dc.typejournal article
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