Oleic acid plays a crucial role as the primary collector in fluorite flotation. N-hydroxy-9,10-epoxy group-octadecanamide (N-OH-9,10-O-ODA) is synthesized by modifying the structure of oleic acid. This modification involves converting the carboxyl group, the polar functional group of oleic acid, into an N-hydroxy amide group and introducing an epoxy group. These modifications are aimed at enhancing the selectivity and collecting ability of oleic acid. Utilizing N-OH-9,10-O-ODA as the collector results in a significantly higher recovery rate of fluorite of approximately 95% compared to only about 20% for calcite. Fluorite surface treated with N-OH-9,10-O-ODA exhibits a more substantial negative shift in its zeta potential, approximately 73 mV, compared to N-OH-9,10-O-ODA-treated calcite surface, which only displays an absolute value of approximately 41 mV. The greater discrepancy suggests a greater adsorption quantity of N-OH-9,10-O-ODA on fluorite surface, thereby enhancing its ability to collect fluorite particles more effectively. First-principles calculations reveal a higher adsorption energy of N-OH-9,10-O-ODA on fluorite surface compared to calcite. The disparity indicates a greater adsorption intensity of N-OH-9,10-O-ODA on fluorite surface, resulting in its higher adsorption amount on fluorite surface.

油酸作为萤石浮选的主要捕收剂发挥着至关重要的作用。通过对油酸结构进行修饰，合成N-羟基-9,10-环氧基-十八酰胺(N-OH-9,10-O-ODA)。这种修饰涉及将羧基（油酸的极性官能团）转化为N-羟基酰胺基团并引入环氧基团。这些修饰的目的是增强油酸的选择性和捕集能力。使用 N-OH-9,10-O-ODA 作为捕收剂可显着提高萤石的回收率，约为 95%，而方解石的回收率仅为 20% 左右。与经 N-OH-9,10-O-ODA 处理的方解石表面相比，经 N-OH-9,10-O-ODA 处理的萤石表面的 zeta 电位出现更显着的负移，约为 73 mV，后者的绝对值仅约为 41 mV。差异越大说明萤石表面N-OH-9,10-O-ODA的吸附量越大，从而增强其更有效地收集萤石颗粒的能力。第一性原理计算揭示了 N-OH-9 具有更高的吸附能，萤石表面上的 10-O-ODA 与方解石相比。这种差异表明N-OH-9,10-O-ODA在萤石表面的吸附强度较大，导致其在萤石表面的吸附量较高。