METHOD FOR FLOTATION OF COAL Russian patent published in 1994 - IPC

FIELD: useful minerals enrichment. SUBSTANCE: method involves pulping and conditioning followed by separation. Above mentioned conditioning is carried out with the help of reagent mixture containing tractor kerosene as collecting agent and vat residue of butyl alcohols as foaming agent. Technical product being prepared by oxyethylation of oleic acid (its quantity being 1 mole) with ethylene oxide (its quantity being 5 moles) is added during conditioning; said product contains polyethylene glycol esters of oleic acid having formula С₁₇H₃₃COO (C₂H₄)_n-CH₂CH₂OH where n = 1-4. Ratio of tractor kerosene, vat residue of butyl alcohols and mentioned above product is 94.5: 3.4:2.1-96.2:2.9:0.9. EFFECT: improves efficiency of the method. 4 tbl, 1 dwg