Extractive Recovery of Gold(I) from Cyanide-containing Aqueous Alkali with Guanidine Derivatives

Abstract

Extractive recovery of gold(I) from cyanide-containing aqueous alkali with guanidine dialkyl and diaryl derivatives was studied.According to recent studies, alkyl guanidines show promise for extraction and sorption of dicyanoaurate(I) anions from aqueous solutions [1,2]. To elucidate how the guanidine structure affects the efficiency of extractive recovery of gold(I) from aqueous cyanide solutions, we prepared and tested several guanidine derivatives R-NH-C-NH-R,

Synthesis of guanidine-containing copolymers and their applications in the sorption of transition metals

“…The guanidine‐containing compounds are stable to heat, which are the good additives for polymer materials. Moreover, such alkylguanidines attract the attention of researchers as extraction agents and sorbents of dicyanoaurate ions from aqueous and alkaline solutions . Chemical modification of the polymers by ligands containing the guanidine moiety leads to the formation of ion exchangers, applied to the sorption of organic compounds as well as to the complexation of transition metals .…”

“…Moreover, such alkylguanidines attract the attention of researchers as extraction agents and sorbents of dicyanoaurate ions from aqueous and alkaline solutions. [5,6] Chemical modification of the polymers by ligands containing the guanidine moiety leads to the formation of ion exchangers, applied to the sorption of organic compounds as well as to the complexation of transition metals. [7] That is why guanidine group introduction into high molecular weight compounds is undoubtedly of interest.…”