13-18 May 2018
Casino Conference Centre
Europe/Prague timezone

Fluorinated diluents - progress and hope

14 May 2018, 15:30
Red Hall (Casino Conference Centre)

Red Hall

Casino Conference Centre

Invited Separation Methods, Speciation SEP 1


Vasiliy Babain (ITMO University)


Usually extractants have been used as solution in diluents. Diluent influences on properties of extraction mixture very significantly. Hydrocarbons are traditional diluents. Unfortunately, hydrocarbons are low-polar compounds and therefore are not good as diluents for polar extractants.
Fluorinated diluents are possible alternative for hydrocarbons ones. Best studied polar fluorinated diluent: meta- nitrobenzotrifluoride (F-3, MNBTF) was used as diluent for chlorinated cobalt dicarbollide in industrial scale. It was used also for many polar extractants – from carbamoylphosphine oxide to calixarenes and amides of heterocyclic acids. It's disadvantages - rather high solubility in acid solution and toxicity (because it’s nitroaromatic compound), were reduced by use of phenyl trifluoromethyl sulfone (FS-13, PMTS).
Fluorinated diluents without aromatic ring are more promising. Different classes of compounds - fluorinated alcohols, formals, esters and ethers of fluorinated alcohols were studied as diluents for crown-ethers, TBP, carbamoylphosphineoxides, amides of diglycolic acid etc.
The goal of the presented work is the review of history of fluorinated diluents use and discussion of possible ways of its future development.

Primary authors

Vasiliy Babain (ITMO University) Mikhail Alyapyshev (ITMO University) Christian Ekberg (Nuclear Chemistry, Chalmers University of Technology) Jenny Halleröd (Chalmers University of Technology) Terry Todd (Idaho National laboratory)

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