Recovery of platinum-group metals and other metal valuables
CA 1299777 C · Owner: Slabbert, Wickus · Inventors: Davidtz, John C.; Slabbert, Wickus; Klein, Elias M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A froth flotation promotor and/or collector for the recovery of metals from the platinum-group which comprises one or more compounds from the group of compounds including trithiocarbonates or phosphates; alkyl derivatives thereof having 2 to 16 carbon atoms; and the ammonium or alkali me tal salts of any of these compounds. The sodium salt of isopropyl trithiocarbonate was found to be particularly useful as promotor and/or collector. A method of utilizing these compounds in a froth flotation process for the recovery of platinum-group metals is also disclosed. A further feature of the invention is a froth flotation collector for the recovery of a metal valuable comprising a combination of at …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.