diesel collectors is presented on table 1 and in fig1 yield is a measurement of how much of the fines were removed as concentrate ash is a measure of how much unwanted material was present in the concentrate when the coal was burned dosage is an indication of how much of the composition was added only a small fraction of the composition was the commercially available collector this is indicated by the active collector component dosage sample i contained 10 commercially available refined paraffinic oil 6 fatty acid 15 surfactant 2 butoxy ethanol 5 commercially available alcohol blend a waste stream derived from the production of 2 ethyl hexanol 5 63 2 water and 0 8 potassium hydroxide solid sample ii contained 10 commercially available diesel 7 fatty acid 12 surfactant 2 butoxy ethanol 5 commercially available alcohol blend a waste stream derived from the production of 2 ethyl hexanol 5 615 water and 2 5 potassium hydroxide 45 solution in water sample iii contained 15 commercially available diesel 7 fatty acid 15 surfactant 2 butoxy ethanol 5 commercially available alcohol blend a waste stream derived from the production of 2 ethyl hexanol 5 55 5 water and 2 5 potassium hydroxide 45 solution in water samples i ii and iii are examples which representative the general principle of converting any collector bearing composition into the form of a microemulsion and using that microemulsion as the collecting agent the data demonstrates that a much smaller amount of active collector composition as low as 5 50 or more or even less is required to get the same or better effects than.