Reverse froth flotation of calcite ore
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United States of America Patent
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Jan 15, 2013
Grant Date -
Aug 20, 2009
app pub date -
Apr 18, 2007
filing date -
Apr 21, 2006
priority date (Note) -
Expired
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Abstract
The invention relates to a reverse froth flotation process for treating a calcium carbonate ore containing silicates. The process comprises the use of two collectors selected from the group consisting of fatty tri-lower-alkyl quaternary ammonium compounds, fatty di-lower-alkyl benzyl quaternary ammonium compounds, fatty lower-alkyl di-benzyl quaternary ammonium compounds, di-fatty di-lower-alkyl quats, di-fatty lower-alkyl benzyl quats, and fatty bis-imidazoline quats. The use of a combination of different quats was found to result in a synergetic performance of the collectors.
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