The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 2016
Filed:
Apr. 18, 2014
Northwestern University, Evanston, IL (US);
J. Fraser Stoddart, Evanston, IL (US);
Zhichang Liu, Evanston, IL (US);
Marco Frasconi, Evanston, IL (US);
Dennis Cao, Evanston, IL (US);
Northwestern University, Evanston, IL (US);
Abstract
Methods for recovering gold from gold-bearing materials are provided. The methods rely upon on the self-assembly of KAuBrand α-cyclodextrin (α-CD) in aqueous solution to form a co-precipitate, a 1:2 complex, KAuBr•(α-CD)('α•Br'), either alone or in an extended {[K(OH)][AuBr]⊂(α-CD)}chain superstructure (FIG.). The co-precipitation of α•Br is selective for gold, even in the presence of other metals, including other square-planar noble metals. The method enables one to isolate gold from gold-bearing materials from diverse sources, as further described.