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Selective Enantiomer Separation by Pertraction
Izák, Pavel ; Kačírková, Marie ; Vychodilová, Hana ; Červenková Šťastná, Lucie ; Žitka, Jan ; Brožová, Libuše ; Storch, Jan ; Randová, A. ; Hovorka, Š.
Membrane processes are not commonly used in enantiomer separation due to insufficiency explication of separation mechanisms and because the results of chiral membrane separation are not quite satisfying, especially in comparison with other separation technics, namely HPLC. A new method for selective separation of enantiomers by membrane processes taking advantage of ionic liquids is present. The supported chiral room temperature ionic liquid membrane is used for separation of enantiomers. Volatile enantiomers are separated by pervaporation and non-volatile enantiomers by pertraction.
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Organic Vapour Sorption and Permeation in Polymer Gel Membrane Containing Imidazolium Based Ionic Liquid
Morávková, Lenka ; Vopička, O. ; Vejražka, Jiří ; Vychodilová, Hana ; Sedláková, Zuzana ; Friess, K. ; Izák, Pavel
In this work, vapour sorption and transport properties were studied for the aliphatic hydrocarbon (hexane), branched hydrocarbon (isooctane), and alcohol (ethanol) using a gravimetric sorption apparatus and a home-made laboratory-scale apparatus, respectively. The ionic liquid polymer gel membrane based on poly(vinylidene fluoride-cohexafluoropropylene) (abbreviated p(VDF-HFP)) was prepared by solvent casting from a solution in acetone. The used membrane contains 80 wt. % of the imidazolium basedionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf2N]).
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22014090110397 - PDF
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Liquidation of Brominated Flame Retardants from Waste Water
Vajglová, Zuzana ; Vychodilová, Hana ; Kotas, Petr ; Jiřičný, Vladimír
In this work we focused on the degradation method with a high potential for degradation of polybrominated diphenyl ethers from liquid waste. Very good results were achieved with the chemical degradation methods using nanostructured iron. Electrochemical method gave the best results of degradation of PBDE. Within the frame of this work we have used for the first time an electrochemical microreactor whose application in this context has not been described in the literature. The obtained original experimental results confirm the significantly higher efficiency and speed of degradation in comparison with the classic electrochemical reactor and chemical methods of PBDE degradation.
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