title: Two solid-phase recycling method for basic ionic liquid [C4mim]Ac by macroporous resin and ion exchange resin from Schisandra chinensis fruits extract.
abstract: In this study, two solid-phase recycling method for basic ionic liquid (IL) 1-butyl-3-methylimidazolium acetate ([C4mim]Ac) were studied through a digestion extraction system of extracting biphenyl cyclooctene lignans from Schisandra chinensis. The RP-HPLC detection method for [C4mim]Ac was established in order to investigate the recovery efficiency of IL. The recycling method of [C4mim]Ac is divided into two steps, the first step was the separation of lignans from the IL solution containing HPD 5000 macroporous resin, the recovery efficiency and purity of [C4mim]Ac achieved were 97.8% and 67.7%, respectively. This method cannot only separate the lignans from [C4mim]Ac solution, also improve the purity of lignans, the absorption rate of lignans in [C4mim]Ac solution was found to be higher (69.2%) than that in ethanol solution (57.7%). The second step was the purification of [C4mim]Ac by the SK1B strong acid ion exchange resin, an [C4mim]Ac recovery efficiency of 55.9% and the purity higher than 90% were achieved. Additionally, [C4mim]Ac as solvent extraction of lignans from S. chinensis was optimized, the hydrolysis temperature was 90°C and the hydrolysis time was 2h.
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, 150040 Harbin, China; College of Material Science and Engineering, Northeast Forestry University, 150040 Harbin, China.
authors.forename: Chun-hui
authors.initials: CH
authors.lastname: Ma
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, 150040 Harbin, China.
authors.forename: Yuan-gang
authors.initials: YG
authors.lastname: Zu
authors.affiliation: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, 150040 Harbin, China. Electronic address: ylmanefu@163.com.
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.affiliation: College of Material Science and Engineering, Northeast Forestry University, 150040 Harbin, China. Electronic address: nefulijian@163.com.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
mesh_terms: D034242:Cyclooctanes / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry*; D007475:Ion Exchange Resins / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D017705:Lignans / Q000737:chemistry*; D032141:Schisandra / Q000737:chemistry*
chemical_list: D034242:Cyclooctanes; D007475:Ion Exchange Resins; D052578:Ionic Liquids; D017705:Lignans
keywords: Basic ionic liquid; Biphenyl cyclooctene lignans; Ion exchange resin; Macroporous resin; Recovery; Schisandra chinensis