β-Amino-hydroxamate surfactants including N-(3-(dodecylamino)) hydroxamic acid (DAHA), N-(3-(octylamino)) hydroxamic acid (OAHA) and N-(3-(hexylamino)) hydroxamic acid (HAHA) were synthesized and firstly used as flotation collectors in bastnaesite flotation. Micro-flotation results indicated that DAHA, OAHA and HAHA displayed strong collecting affinity toward bastnaesite. And HAHA floated out 92.4% bastnaesite and 37.1% calcite from their artificially mixed minerals, inferring its excellent flotation selectivity toward bastnaesite versus calcite. The existence of HAHA elevated the zeta potential of bastnaesite, while had a slight effect on calcite. The entropy change ΔS, enthalpy change ΔH, free energy change ΔG (298 K) and activation energy E_a for bastnaesite adsorption of HAHA were 317.36 J·mol^-1·K^-1, 74.53 kJ·mol^-1, -20.04 kJ·mol^-1 and 13.20 kJ·mol^-1, respectively, deducing an endothermic-spontaneous chemisorption process. FTIR and XPS recommended that HAHA chelated with surface Ce atom(s) to form five-membered hydroxamate-(O,O)-Ce complexes. And the amino group of HAHA facilitated its adsorption onto bastnaesite surfaces, thereby accelerated to generate surface complexes, resulting in a significant intensification toward bastnaesite flotation recovery.

β-氨基异羟肟酸酯表面活性剂，包括N-（3-（十二烷基氨基））异羟肟酸（DAHA），N-（3-（辛基氨基））异羟肟酸（OAHA）和N-（3-（己基氨基））异羟肟酸（HAHA） ）合成，并首先用作浮渣收集器。微浮选结果表明，DAHA，OAHA和HAHA对碱土具有很强的收集亲和力。HAHA从其人工混合矿物质中浮出了92.4％的辉石和37.1％的方解石，这表明其相对于方解石具有优异的浮选选择性。HAHA的存在提高了镁橄榄石的ζ电位，而对方解石的影响却很小。熵变ΔS，焓变ΔH，自由能变化ΔG（298 K）和活化能E_一个HAHA的用于氟碳铈镧矿为吸附317.36·J·摩尔^-1 ·K ^-1，74.53千焦·摩尔^-1，-20.04千焦·摩尔^-1和13.20千焦·摩尔^-1，分别推导的吸热-自发的化学吸附过程。FTIR和XPS建议HAHA与表面Ce原子螯合形成五元异羟肟酸酯-（O，O）-Ce络合物。HAHA的氨基有利于其吸附在镁橄榄石表面，从而加速生成表面复合物，从而导致向镁橄榄石浮选恢复的显着增强。