Process for recovering platinum group metals from ores and concentrates
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United States of America Patent
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Issued Date -
Jun 14, 2007
app pub date -
Jul 20, 2004
filing date -
Jul 22, 2003
priority date (Note) -
Abandoned
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Abstract
A method for recovering at least one platinum group metal (PGM) species from a feed product selected from the group consisting of chromite ore, chromite ore concentrate and PGM concentrate comprising the steps of: mixing the feed with at least one salt so as to produce a mixture, whereby the concentration of salt in the mixture is sufficient to convert at least one PGM species into a corresponding PGM chloride salt; and contacting the mixture with gaseous chlorine and CO at a temperature between about 240.degree. C. and 800.degree. C. to induce the conversion of at least one species of PGM into a corresponding PGM chloride salt, whereby said chloride salt of at least one PGM species can be recovered.
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