The physicochemical properties of a room-temperature liquidus binary ionic liquid mixture of [HNMP][CH3SO3]/[Bmim]Cl and its application for fructose conversion to 5-hydroxymethylfurfural. Issue 34 (23rd May 2018)

• Record Type: Journal Article
• Authors: Xiao, Yuyan; Huang, Xirong
• Is Part Of: RSC advances. Volume 8:Issue 34(2018)
• Page Start: 18784
• Page End: 18791
• Publication Date: 2018-05-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra03604g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A liquidus mixture of [HNMP][CH3 SO3 ]/[Bmim]Cl has been characterized and tried as medium for room-temperature conversion of fructose into HMF. Abstract : Via heating first and then cooling, binary ionic liquid (IL) mixture of N -methyl-2-pyrrolidonium methylsulfonate ([HNMP][CH3 SO3 ]) and 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) could form a liquid at room temperature. The glass-transition temperature ( T g ) characterized by DSC depends on its composition with T g being as low as −63 °C. The physicochemical properties of the binary IL mixtures also vary with the composition. With the increase of the mole fraction of [Bmim]Cl, the hydrogen-bond accepting ability ( β ) of the binary IL mixture increases, but the hydrogen-bond donating ability ( α ) deceases. In this binary IL mixture, fructose could be effectively converted into 5-hydroxymethylfurfural (HMF) at room temperature. The HMF yields at a given time are found to be well correlated with the physicochemical properties of the binary mixture, especially the α and β values. Under specified conditions, the present IL mixture as medium for fructose dehydration into HMF is comparable to the medium formed by ILs and alcohol, where the alcohols have negative effect on the HMF formation.