Application Type
Patents
Application SubType
PCT
(10) Registration Number and Date
Status
Filed-Formality Examination
(180) Expiration Date
(20) Filing Number and Date
PG P/2023/000040 2022.04.12
(40) Publication Number and Date
(86) PCT Filing Number and Date
(87) PCT Publication Number and Date
(85) National Entry Date
(30) Priority Details
US 63/174,409
2021.04.13
(71/73) Applicant
(72) Inventor
(EN) MELASHVILI, Mariam : 991 Glebemount Crescent, Peterborough, Ontario K9H 6M1 (CA)
(EN) SMOLIK, Theodore James : 8013 Chinook Way, Blaine, Washington 98230 (US)
(74) Representative Name
(EN) SPRUSON & FERGUSON : C/- REMARKS PACIFIC LIMITED, P.O BOX 75, GORDONS, NATIONAL CAPITAL DISTRICT
(54) Title
(EN) IN-SITU GENERATION OF THIOSULPHATE LIXIVIANT SYSTEMS AND METHODS FOR PRECIOUS METAL LEACHING AND RECOVERY
(57) Abstract
(EN)
A method of extracting precious metal values from a starting material using thiosulphate as a lixiviant. The precious metal values can be recovered from solution using a reductant. The reductant may be a naturally occurring ore including as a component pyrite, chalcopyrite, marcasite and/or pyrrhotite, or can be ferrous sulphate. Sodium hydrosulphide can be added as a scavenging precipitant after the reductant to regenerate thiosulphate. The thiosulphate can be recycled to leach additional precious metal values
(58) Citations