METHOD OF COAL FLOATATION Russian patent published in 2009 - IPC B03D1/02 

FIELD: technological processes; mining.

SUBSTANCE: method includes conditioning of pulp with further introduction of modifier, collector and foaming agent, extraction of flammable mass into concentrate. Modifier added to pulp conditioning is represented by sodium salts of carboxy methylates of oxyethylised isononylphenol, with common formula of C₉H₁₉-C₆H₄-O-(C₂H₄O)_n-COONa, where n=10-12 in amount of 0.01-1.00 g/t.

EFFECT: higher extraction of flammable mass into concentrate, lower consumption of modifier.

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