公开(公告)号：US11041227B2

公开(公告)日：2021-06-22

申请号：US16302204

申请日：2017-05-17

Applicant: BROMINE COMPOUNDS LTD. ,  TENOVA ADVANCED TECHNOLOGIES LTD

Inventor： Keren Larmour-Ship ,  Tal Fabian ,  Alan Miller ,  Sharon Krumbein Rubin ,  Elizabeta Shandalov ,  Mira Bergstein Freiberg

IPC: C22B3/00 ,  C22B3/38 ,  C22B3/26 ,  C22B3/44 ,  C22B3/10 ,  C25B1/24 ,  C22B11/00

Abstract: A process for recovering gold from a gold-containing raw material, comprising leaching the gold-containing material with an aqueous solution comprising elemental bromine and bromide source to form a pregnant leach solution with the gold dissolved therein; separating said pregnant leach solution from the gold-depleted raw material, removing elemental bromine from said pregnant leach solution, extracting the gold from the pregnant leach solution in an acidic environment into an organic extractant, to form a gold-loaded extract and bromide-containing raffinate, stripping the extract with an alkaline aqueous solution to form a gold-bearing aqueous solution, generating gold (Au0) and treating bromide-containing stream(s) to produce recyclable elemental bromine.

公开(公告)号：US09963359B2

公开(公告)日：2018-05-08

申请号：US14763700

申请日：2014-01-27

Applicant: BROMINE COMPOUNDS LTD.

Inventor： Emanuel Korngold ,  Mordechai Cohen ,  Mira Bergstein Freiberg ,  Sharon Krumbein Rubin

IPC: C02F1/42 ,  B01J41/05 ,  C02F101/12 ,  C02F103/18

CPC classification number: C02F1/42 ,  B01J41/05 ,  C02F2001/422 ,  C02F2101/12 ,  C02F2103/18 ,  C02F2303/16 ,  C02F2303/185

Abstract: The invention relates to a process for recovering bromide from a halide-containing aqueous stream, comprising the steps of: providing a feed of halide-containing aqueous stream; contacting an anion-exchange resin with said feed, to form halide-loaded resin; treating said halide-loaded resin with a regenerant and subsequently with a rinse to produce, in succession, a chloride-rich solution, a mixed chloride/bromide solution, a bromide-rich solution and an essentially halide-free solution; directing said mixed chloride/bromide solution to said feed; processing said bromide-rich solution to recover one or more bromide products; and utilizing said essentially halide-free solution for regenerant dilution and/or rinsing of said resin. An apparatus for carrying out the process is also disclosed.