title: Influence of organic solvent on the separation of an ionic liquid from a lignin-ionic liquid mixture.
abstract: Sixteen solvents added in lignin-ionic liquid mixture provide four types of solubility characteristics. The distinct characteristics can be classified by considering solubility parameters including ET Scale, Kamlet-Taft parameters and solubility parameters. Group 1 solvent shows promising solvents for lignin-ionic liquid separation, contributing full dissolution of ionic liquid with lignin precipitation. Isopropanol, the most potential solvent has solubility properties as following normalized molar electronic transition energies (ET(N))=0.57, hydrogen-bond acidity (α)=0.76 and Hildebrand solubility parameter (δT)=23.58. This study examines potential solvents for ionic recovery, provides simple method of separation and leads to the feasibility of using ionic liquids in industrial applications.
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore.
authors.forename: Piyarat
authors.initials: P
authors.lastname: Weerachanchai
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore.
authors.forename: Kok Hwa
authors.initials: KH
authors.lastname: Lim
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore. Electronic address: jmlee@ntu.edu.sg.
authors.forename: Jong-Min
authors.initials: JM
authors.lastname: Lee
mesh_terms: D006860:Hydrogen Bonding; D052578:Ionic Liquids / Q000302:isolation & purification*; D008031:Lignin / Q000302:isolation & purification*; D009930:Organic Chemicals / Q000737:chemistry*; D012995:Solubility; D012996:Solutions; D012997:Solvents / Q000737:chemistry*
chemical_list: D052578:Ionic Liquids; D009930:Organic Chemicals; D012996:Solutions; D012997:Solvents; D008031:Lignin
keywords: Ionic liquid; Lignin; Organic solvents; Solubility parameter