Iron‐Catalyzed Furfural Production in Biobased Biphasic Systems: From Pure Sugars to Direct Use of Crude Xylose Effluents as Feedstock

Working with real samples: Aqueous solutions of FeCl3–NaCl (or seawater) dehydrate xylose to afford furfural, which can extracted in situ into 2-MTHF as second phase. Furfural is successfully obtained when aqueous nonpurified xylose effluents directly from lignocellulose fractionation are tested.