Abstract
The reaction of crosslinked polyepichlorohydrin (PECH) with either thioglycolic acid (TGA), KSH, NaSH or thiourea (TU) to give resins in which most of the pendent chloromethyl groups in the crosslinked PECH have been replaced by sulfur-containing groups is described. Despite the high sulfur content of the resins obtained by reaction with NaSH, no evidence for the formation of free thiol groups was found and their capacity for mercury(II) ions was low. On the other hand, the resins obtained by reaction with TGA had capacities for mercury(II) ions of greater than 2 mmol / g, while the best capacity for mercury of 4.2 mmol / g was found for a resin obtained by the TU reaction. The resins obtained by the TGA or TU reactions were difficult to regenerate, but could be completely regenerated with at least 1:1 HCl.
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