A simple and efficient synthesis of 5-hydroxymethylfurfural from carbohydrates using acidic ionic liquid grafted on silica gel.

30 Despite such promising benefits, ILs' popular utilization was restricted by various limitations: (i) a high viscosity, resulting in only an IL amount participating in the catalysis process, (ii) homogeneous reaction, which made the separation of products and catalyst difficult, and (iii) subsequently expensive for the application of ILs in fairly significant quantities. 31,32 To address these issues, catalysts that combined the beneficial properties of ILs and solid acids were suggested. 33 With all of these in mind, and as part of our ongoing study into designing effective heterogeneous catalysts for 5-HMF generation, we present the design and manufacture of a new catalyst, SiO 2 -Imi-SO 3 H, via an accessible pathway, and the catalyst physicochemical characteristics were studied.

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