Comparative Studies on Flotation Performance of Saturated Fatty Acids and Unsaturated Fatty Acids Separated from Hogwash Oil

Low flotation recovery, high pulp temperature, and large dosage of reagents are the typical disadvantages when using mixed fatty acids (MFA) prepared from hogwash oil for directly. To determine type acid that yields poor performance, performance adsorption characteristics saturated (SFA) unsaturated (UFA) separated MFA were studied in our work. GC-MS, FT-IR, iodine value detection melting point measurement showed UFA contained –(CH=CH–CH2)n- groups had much lower point. Quartz tests used to compare SFA, which excellent low-temperature floatability, recovery was 35 percentage points higher than SFA at 20 °C pH = 11.5. Zeta potential, FT-IR XPS analysis indicated could adsorb onto surface activated quartz through chemisorption hydrogen bonding. However, stronger more favorable; thus, reason have presence SFA.