FIELD: chemistry.
SUBSTANCE: present invention relates to a method of separating a first material from a second material, which includes the following steps: mixing a first material and a second material in the form of a suspension with a concentrating composition while facilitating formation of air bubbles in the suspension to form aggregates of particles with bubbles with the first material, and enabling aggregates of particles with the bubbles to separate from the second material, wherein said concentrating composition includes a floatation agent obtained from a process of producing ethanol and which contains a mixture of a fatty acid and at least one glyceride, wherein the floatation agent is combined with one or more substances capable of collecting particles, and foaming agents.
EFFECT: using effective and safe concentrating compositions.
3 cl, 3 ex, 3 tbl
