The mixture of dodecylamine (DDA) and α-bromododecanoic acid (α-BDDA) was used as a collector to separate spodumene from feldspar and quartz. It was found that at the condition of molar ratio of DDA: α-BDDA 1:19, the collector concentration 0.500 mmol/L, and pH 7.1, the recoveries of spodumene, feldspar, and quartz were 85.90%, 4.48%, and 3.92% respectively in single mineral micro-flotation experiments. A concentrate with a recovery of 80.00% and a Li₂O grade of 6.40% was achieved at the condition of molar ratio of DDA: α-BDDA 1:19, collector concentration 0.430 mmol/L and pH 6.0 in the artificial-mixed-ore micro-flotation experiments. Meanwhile, different flotation behaviors caused by different adding sequence of flotation reagents indicated that DDA could form self-assembly structure with α-BDDA. The separation and adsorption mechanism was investigated by atomic force microscopy, contact angle, zeta potential, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy measurements and turbidity testing. The results revealed that the adsorption of the DDA/α-BDDA obviously increased the hydrophobicity of spodumene, thus led to higher recovery of spodumene. But the DDA/α-BDDA had no significant effect on the hydrophilicity of feldspar and quartz, nor on their contact angles. Thus, feldspar and quartz were sank as tailings. The DDA/α-BDDA was adsorbed on the surface of spodumene by chemisorption, and the main active sites on spodumene to react with the DDA/α-BDDA were Al. The DDA/α-BDDA was a potential selective and efficient collector to separate spodumene from feldspar and quartz at litmusless condition.

使用十二胺（DDA）和α-溴十二烷酸（α-BDDA）的混合物作为捕收剂从长石和石英中分离锂辉石。发现在DDA:α-BDDA摩尔比1:19、捕收剂浓度0.500 mmol/L、pH 7.1条件下，锂辉石、长石和石英的回收率分别为85.90%、4.48%和3.92 %分别在单一矿物微浮选实验中。回收率为 80.00% 的精矿和 Li ₂在DDA:α-BDDA摩尔比为1:19、捕收剂浓度为0.430 mmol/L、pH为6.0的人工混矿微浮选实验中，O品位达到6.40%。同时，不同浮选药剂添加顺序引起的不同浮选行为表明DDA可以与α-BDDA形成自组装结构。通过原子力显微镜、接触角、zeta电位、傅里叶变换红外光谱、X射线光电子能谱测量和浊度测试研究了分离和吸附机制。结果表明，DDA/α-BDDA的吸附明显增加了锂辉石的疏水性，从而提高了锂辉石的回收率。但 DDA/α-BDDA 对长石和石英的亲水性及其接触角没有显着影响。因此，长石和石英作为尾矿下沉。DDA/α-BDDA通过化学吸附作用吸附在锂辉石表面，锂辉石上与DDA/α-BDDA反应的主要活性位点是Al。DDA/α-BDDA 是一种在无石蕊条件下从长石和石英中分离锂辉石的潜在选择性和高效收集器。