Patent ID: 8387801

Claim:
A flotation method for removal of slimes from potash ores wherein said method comprises utilizing at least one collector selected from the group of ethoxylated fatty amines having the formulae 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/or wherein R3 is a hydrocarbyl group having 8-22 carbon atoms; z is a number of from 1-3; X, Y and Y′ are, independently, an alkyl group with 1-4 carbon atoms, or the group -(EO) s H, where EO is an ethyleneoxy unit and s is on average 5-50, wherein 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) s H.