The influence of temperature on the ion exchange properties of phenolformaldehyde sorbents |
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Authors: | L A Shelkovnikova O T Gavlina V A Ivanov and V I Gorshkov |
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Institution: | (1) Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Science, P.O. Box 1126, Hefei, 230031, People’s Republic of China |
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Abstract: | The influence of temperature on cation exchange on phenol groups of macroporous materials based on phenolformaldehyde resins
(PFRs) was studied for Amberlit XAD 761 with irregularly shaped grains obtained by breaking up polycondensation resin blocks
and FFS-1.4/0.7 with spherical granules. An increase in temperature caused some decrease in the sorption capacity of PFRs
in the alkaline region, but almost did not influence the selectivity of alkali metal ion exchange. The sorption capacity and
selectivity of PFRs did not change after multiple (dozens of cycles) transfer of phenol groups from the hydrogen to salt form
and back. Ion exchangers of this type can effectively be used for separating mixtures of alkali metal ions containing cesium
and rubidium. |
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