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Mutual Solubilities of Ammonium-Based Ionic Liquids with Water and with Water/Methanol Mixture
Machanová, Karolina ; Jacquemin, J. ; Wagner, Zdeněk ; Bendová, Magdalena
This work presents a study on solubility in water and in water/methanol mixture of a set of ILs composed of the bi (trifluoromethylsulfonyl)imide anion and of the N-alkyl-triethyl-ammonium cation (abbrev. [NR222][NTf2]) with the alkyl chain R ranging from 6 to 14 carbons. These ILs were successfully tested for enantioselective hydrogenation of β-ketoesters catalyzed by the chiral complex Ru-BINAP in presence of methanol [1]. From which, it appears that these ILs immobilise the catalyst in the mixture for easier recycling and further re-use and protect it from air/oxygen. The final separation of the product is carried out by rinsing the solution with water, which may also wash out the ILs with catalyst. For this reason, mutual solubilities between ILs and water, as well as between ILs and methanol/water mixture need to be investigated in detail.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22012102414102 - PDF
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Rozpustnost 1-ethyl-3-methylimidazolium ethylsulfátu v superkritickém CO2
Bendová, Magdalena ; Sedláková, Zuzana ; Wagner, Zdeněk
In this contribution was studied by the synthetic method. A Thar Technologies Supercritical Phase Monitor was used to carry out the measurements. To check the accuracy of the synthetic apparatus, phase behavior of the binary mixture MTBE plus CO2 was measured both by means of the synthetic method and using a high-pressure phase equilibrium apparatus built in our laboratory. The acquired data were subsequently modeled by a cubic SRK-based equation of state proposed by Yokozeki and Shiflett.
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