High-efficiency gold recovery by additive-induced supramolecular polymerization of cyclodextrin
OwnerHuang Wu, Yu Wang +1inventors
InventorsHuang Wu, Yu Wang, James Fraser Stoddart
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Abstract
Disclosed herein are composition and methods for gold recover based on precisely controlling the reciprocal transformation and instantaneous assembly of the second-sphere coordinated adducts formed between cyclodextrin and gold anions optionally in the presence of an additive.
Claims20
An adduct formed from a cyclodextrin, a gold halide anion, and an additive, wherein the gold halide anion occupies a space between primary faces of the cyclodextrin and the additive occupies a space between secondary faces of the cyclodextrin and/or within an internal cavity of the cyclodextrin.
A method for preparing an adduct comprising contacting a cyclodextrin, a gold halide anion, and an additive in solution.
A method for recovering gold comprising contacting a gold-bearing material with a hydrogen halide to form a gold halide anion, contacting the gold halide anion with a cyclodextrin and an additive to form an adduct, and reducing the adduct.
Dependencies are inferred from the claim text.