Selective adsorption of organic compounds from solutions on hyper-cross-linked polystyrenes with ultimate degrees of cross linking

Saifutdinov, B.; Davankov, V.; Il'in, M.; Tsyurupa, M.; Blinnikova, Z.
November 2015
Protection of Metals & Physical Chemistry of Surfaces;Nov2015, Vol. 51 Issue 6, p957
Academic Journal
The adsorption selectivities of a series of organic compounds from solutions on hyper-cross-linked polystyrene networks (HPNs) with ultimate degrees of cross linking were studied by high performance liquid chromatography (HPLC). The thermodynamic characteristics of adsorption (TCA) of substances under study from water-organic solutions on such HPNs in the Henry region were determined. The TCAs of organic compounds on the HPNs under study as a function of their molecular structures are discussed. It was established that the magnitude of the Gibbs energy change upon adsorption increases with increasing the number of π-electrons in the adsorbed molecules in a series of both aromatic hydrocarbons and their sulfurcontaining heterocyclic analogs. As an example, a model mixture of organic compounds was separated on HPNs by HPLC. It was shown that middle and heavy oil fractions can be fractionated on HPNs into the groups of mono-, di-, and tricyclic aromatic compounds.


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