Abstract A novel hydroxamic acid collector, Octylamino-bis-(isobutanohydroxamic acid) (OIBHA), for bastnaesite flotation was designed by constructing a double branched hydroxamic acid molecular structure and synthesized in the laboratory. Micro-flotation experiments were carried out to study the flotation performance of OIBHA. The adsorption mechanism was investigated by zeta potential, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Micro-flotation experiments revealed that OIBHA exhibited good collective and selective ability, and the effective separation between bastnaesite and fluorite can be realized. FTIR, zeta potential and XPS analysis results indicated that OIBHA was chemically adsorbed on the Ce site of bastnaesite surface. The introduction of the secondary hydroxamic acid group to form the branched molecular structure can improve the collecting ability and selectivity simultaneously.

中文翻译：

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新型双异羟肟酸捕收剂的制备及其对氟碳铈矿浮选的影响

摘要 通过构建双支化异丁胺酸分子结构设计并在实验室合成了一种新型的异丁胺酸捕收剂辛氨基双异丁氧肟酸（OIBHA），用于氟碳铈矿浮选。进行了微浮选实验以研究OIBHA的浮选性能。通过zeta电位、傅里叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)研究了吸附机理。微浮选实验表明，OIBHA具有良好的集体和选择性，可以实现氟碳铈矿和萤石的有效分离。FTIR、zeta电位和XPS分析结果表明OIBHA化学吸附在氟碳铈矿表面的Ce位点上。