FOARMING REAGENT FOR COAL FLOTATION PROCESS Russian patent published in 1998 - IPC

FIELD: coal benefication. SUBSTANCE: invention aims at increasing recovery of the coal combustion mass into concentrate, reducing consumption of reagents, increasing flotation rate, and improving selectivity of flotation process. To that end, as foaming reagent, high-boiling product from processing butyl alcohols production bottoms is used containing, wt.-%: C₈-alcohols, 5.40-5.52; C₁₂-acetals, 33.5-35.1; C₁₆-acetals, 15.0-15.8; C₁₂-esters, 4.90-5.30; C₁₂-C₁₆-ethers, 37.5-39.5; resins, 1.06-1.16; water, 0.10- 0.16. EFFECT: enhanced process efficiency. 1 dwg , 3 tbl