US 11,654,443 B2
Mineral processing
Warrick James David Allen, Hilversum (NL); Simon David Childs, Droitwich (GB); Andrea Duffy, Atherstone (GB); Nicholas Horrocks, Dusseldorf (DE); Elizabeth Lakin, Long Eaton (GB); Paul Edward Young Milne, Worcester (GB); and James Leonard Rolfe, London (GB)
Assigned to CIDRA MINERALS PROCESSING INC., Wallingford, CT (US)
Filed by CiDRA Minerals Processing Inc., Wallingford, CT (US)
Filed on Mar. 30, 2020, as Appl. No. 16/834,406.
Application 16/834,406 is a continuation of application No. 14/344,490, granted, now 10,603,676, previously published as PCT/GB2012/052269, filed on Sep. 13, 2012.
Claims priority of application No. 1115823 (GB), filed on Sep. 13, 2011.
Prior Publication US 2020/0316613 A1, Oct. 8, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. B03D 1/016 (2006.01); B03D 1/012 (2006.01); B03D 1/02 (2006.01); B03D 1/008 (2006.01); B03D 1/014 (2006.01); B03D 1/004 (2006.01)
CPC B03D 1/016 (2013.01) [B03D 1/008 (2013.01); B03D 1/012 (2013.01); B03D 1/023 (2013.01); B03D 1/0046 (2013.01); B03D 1/014 (2013.01); B03D 2201/02 (2013.01); B03D 2203/025 (2013.01)] 26 Claims
 
1. A method of processing a mixture of minerals including the steps of:
(a) providing a mixture of minerals which includes a metal containing mineral and one or more unwanted gangue minerals;
(b) achieving a contact between the mixture of minerals and polymeric material that includes a mineral binding moiety which selectively binds to the metal containing mineral;
(c) separating the gangue minerals and the polymeric material which has the metal containing mineral bound thereto; and
(d) releasing the metal containing mineral from the polymeric material, wherein step b) includes the substeps of:
i) introducing a collector compound to the mixture of minerals, wherein the collector compound includes the mineral binding moiety and a polymer attachment moiety;
ii) selectively binding the collector compound to the metal containing mineral; and
iii) attaching the collector compound to a polymer using the polymer attachment moiety; in which in sub-step iii) the collector compound is attached to the polymer by a covalent bond formed by a SN2 nucleophilic reaction between the polymer attachment moiety and a surface group of the polymer;
wherein the polymeric material includes either a methacrylate polymer or a silane polymer.