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Recent restriction of boron concentration in drinking water has produced some problems in the seawater
desalinization plants because the rejection of boron in most of the plants is inadequate. Three ionic liquids
derived from Cyanex 272 as an anion with different cations (from Aliquat 336, Cyphos IL 101 and
Cyphos IL 167) were prepared to be used as boron extractants. Liquid–liquid extraction experiments were
carried out to evaluate the viability of boron separation from high chloride media. The effect of ILs and
boron concentration and pH were determined. Successive extractions, maintaining the organic phase,
provided satisfactory results in order to implement these ILs on supported liquid membrane technologies.
The use of the ionic liquid as a carrier can overcome the inconvenience associated with the membrane
stability. In this sense, the ionic liquids ALiCY and the mixture of Cyphos IL 101 and Cyphos IL
167 with Cyanex 272 have been tested as liquid carrier for boron separation by using a flat sheet supported
liquid membrane. The results obtained allow us to think about the application of this kind of
ILs on the process intensification to remove boron from chloride solutions.
CitationFortuny, A.; Coll, M.T.; Sastre, A. Use of methyltrioctyl/decylammonium bis 2,4,4-(trimethylpentyl)phosphinate ionic liquid (ALiCY IL) on the boron extraction in chloride media. "Separation and purification technology", 03 Setembre 2012, vol. 97, p. 137-141.
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