Treatment of ores or metallurgical by-products containing arsenic and antimony
CA 1069316 A · Owner: Metallurgie Hoboken-Overpelt · Inventors: Hiemeleers, Jozef; De Schepper, Achille; Van Peteghem, Antoine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for treating a metal bearing material containing arsenic and antimony by leaching in an acid solution with an oxygen containing gas under pressure at a temperature of between 20 and 200°C, the improvement which consists in adding at least one element chosen from the group consisting of arsenic and phosphorous in such an amount to the leach mixture that the molar ratio (As + 4P) : Sb therein shall be at least equal to 8 thus, dissolving at least the major part of the arsenic and antimony contained in the starting material.
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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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.