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DESs composed of cholinium chloride ([Ch]Cl) and malic acid or glycolic acid at different molar ratios, and the effects of water and \u03b3\u2010valerolactone (GVL) contents, solid\/liquid (S\/L) ratio, and microwave heating are investigated. The best furfural yields are obtained with the DES [Ch]Cl:malic acid (1:3 molar ratio)+5\u2005wt\u2009% water, under microwave heating for 2.5\u2005min at 150\u2009\u00b0C, a S\/L ratio of 0.050, and GVL at a weight ratio of 2:1. Under these conditions, a remarkable furfural yield (75\u2009%) is obtained. Direct distillation of furfural from the DES\/GVL solvent and distillation from 2\u2010methyltetrahydrofuran (2\u2010MeTHF) after a back\u2010extraction step enable 89\u2009% furfural recovery from 2\u2010MeTHF. This strategy allows recycling of the DES\/GVL for at least three times with only small losses in furfural yield (&gt;69\u2009%). This is the fastest and highest\u2010yielding process reported for furfural production using bio\u2010based DESs as solvents and catalysts, paving the way for scale\u2010up of the process.<\/jats:p>","DOI":"10.1002\/cssc.201902848","type":"journal-article","created":{"date-parts":[[2019,12,17]],"date-time":"2019-12-17T10:48:05Z","timestamp":1576579685000},"page":"784-790","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":89,"title":["Enhanced Conversion of Xylan into Furfural using Acidic Deep Eutectic Solvents with Dual Solvent and Catalyst Behavior"],"prefix":"10.1002","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6759-8102","authenticated-orcid":false,"given":"Eduarda S.","family":"Morais","sequence":"first","affiliation":[{"name":"CICECO\u2014Aveiro Institute of Materials, Chemistry Department University of Aveiro  3810-193 Aveiro Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8895-0614","authenticated-orcid":false,"given":"Mara G.","family":"Freire","sequence":"additional","affiliation":[{"name":"CICECO\u2014Aveiro Institute of Materials, Chemistry Department University of Aveiro  3810-193 Aveiro Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6320-4663","authenticated-orcid":false,"given":"Carmen S. 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