Hardwood lignosulfonates for separating gangue materials from metallic sulfide ores
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United States of America Patent
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Jul 17, 2012
Grant Date -
Sep 16, 2010
app pub date -
Aug 29, 2008
filing date -
Aug 31, 2007
priority date (Note) -
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Abstract
Disclosed are compositions and methods for separating gangue material from metallic sulfide ores. The compositions typically include a lignosolfonate and do not include a cyanide salt. Suitable lignosulfonates may include lignosulfonates, for example hardwood lignosulfonate having a weight average molecular weight of about 3 kDa to about 12 kDa and having a relatively low sulfur content and a relatively low sulfonate content.
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