SURFACE-ACTIVE FATTY ACID ESTER DERIVATIVES AND/OR FATTY ACID DERIVATIVES AS COLLECTING AGENT IN THE FLOTATION OF NON-SULFIDE ORES

摘要

Surface-active fatty acid ester derivatives and/or fatty acid derivatives, which are obtained by reacting epoxidized fatty acid esters with 1 to 3 moles of sulfur trioxide per mole of epoxide oxygen at 20 to 100.degree.C, reacting the reaction product (A) with nucleophilic reagents and, if desired, saponifying the ester bond, are used as collecting agents in the flotation of non-sulfide ores.