Mixture of collectors for flotation of clay minerals from potash ores
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United States of America Patent
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Mar 12, 2013
Grant Date -
Sep 22, 2011
app pub date -
Nov 26, 2008
filing date -
Nov 26, 2008
priority date (Note) -
Expired
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Abstract
The invention relates to a flotation process for removal of slimes from potash ores which includes a step in said process wherein a collector is used which is a mixture of ethoxylated fatty amines having the formulae (I) wherein R1 and R2 are, independently, a hydrocarbyl group having 1-22 C-atoms, and n is on average above 15 and less than 100, and (II) wherein R3 is a hydrocarbyl group having 8-22 carbon atoms; z is a number 1-3; X, Y and Y′ are, independently, an alkyl group with 1-4 carbon atoms or the group -(EO)sH, wherein EO is an ethyleneoxy unit and s is on average 5-50, and the sum of all s is on average 15 or more, and less than 100; provided that at least one of X, Y and Y′ is a group -(EO)sH; and where the molar ratio of I to II is 1:5 to 5:1. The invention also relates to said mixtures of collectors where the molar ratio of I to II is 1:5 to 5:1. The invention further relates to a process wherein the above process step of flotation of slime is followed by a step of flotation of KCI using a different type of collector.
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