FOAMING AGENT FOR MINERAL FLOTATION AND METHOD OF ITS PRODUCTION Russian patent published in 2003 - IPC

FIELD: mineral concentration; applicable in flotation of ores of nonferrous metals and coal. SUBSTANCE: foaming agent includes, mas.%: dimethyl (isopropenylethynyl) carbinol, 95.0-98.0; tetramethylbutynedioyl, 0.1-1.5; diisopropenyl acetylene, 0.1-1.0; 2,5-dimethyl-1,4- hexadiene-3-on, 1.5-2.5. Method of foaming agent production consists in treatment of tetramethylbutynedioyl with aqueous acid solution in presence of radical polymerization inhibitor at boiling temperature of reaction mixture and simultaneously driving off of formed foaming agent with stems, with preserves constant volume of reaction mixture that is attained by return of water layer after extraction to reaction mixture. Technical result of the invention consists in higher level of mineral recovery in process of flotation within wide range of parameters. EFFECT: higher efficiency of use. 8 cl, 3 tbl, 5 ex