The dehydration of pentose gives furfural, however, furfural is rapidly decomposed and polymerized under the condition necessary for its formation. High yields of furfural can only be achieved by the rapid and continuous removal of furfural from the aqueous solution. Reaction-extraction coupled process is a process in which dehydration reactions of pentose are carried out in the presence of an immiscible organic solvent so that most of the furfural can be extracted from the aqueous reacting phase almost as ...