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:
Sep. 21, 2021
Filed:
Aug. 27, 2019
Flsmidth A/s, Valby, DK;
David J. Chaiko, Quakake, PA (US);
Abstract
A method for removing sulfate iron-containing compounds from a low- to moderate-temperature metal sulfide leach circuit () is disclosed. A reactor () within a chloride leach circuit () and which is preferably maintained at a temperature between 20 and 150 degrees Celsius may be provided with a catalyst () comprising a material selected from the group consisting of: colloidal hematite, colloidal goethite, particulate containing FeOOH, particulate containing α-FeOOH, particulate containing γ-FeOOH, particulate containing FeO, particulate containing α-FeO, particulate containing γ-FeO, particulate containing FeO, particulate containing Fe(OH)SO, and a combination thereof. The catalyst () may also be used with heap leach and/or dump leach circuits (), without limitation. Methods for using and generating the catalyst () are also disclosed. In some embodiments, the catalyst () may be used as an anti-frothing agent (e.g., for zinc leaching, without limitation).