Patent ID: 8393473

Claim:
A flotation method for removing slimes from potash ores which comprises adding a collector to said ores, wherein said collector comprises a mixture 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 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) s H, 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) s H; and where the molar ratio of I to II is 1:5 to 5:1.