Synthesis of α-sulfonate-palmitic Acid Collector and Its Separation Performance for Dolomite and Fluorapatite
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摘要:
通过对棕榈酸进行结构功能修饰和功能团的衍生，合成了α-磺酸基棕榈酸钠（SPA）捕收剂，其对白云石和氟磷灰石具有显著的分选差异性。实验结果表明单矿物浮选中当pH值接近于5，该新型捕收剂用量为6×10-5 mol/L时，其对白云石的回收率为87.65%，而对氟磷灰石仅为35.63%。采用Zeta电位、SEM、EDX和XPS等多种分析手段探讨了该捕收剂与矿物表面的作用机理，论证了该捕收剂在白云石和氟磷灰石表面的吸附属于化学吸附。
Abstract:Based on the modification of the structure and function of palmitic acid and derivation of functional groups, the α-sulfonate-palmitic acid collector(SPA) was synthesized, which showed highly different selectivity for collecting dolomite and fluorapatite. The results of the single mineral flotation test showed that the recovery of dolomite was 87.65% while the recovery of fluorapatite was only 35.63% with the pH value close to 5 and the SPA dosage of 6×10-5 mol/L. A variety of analytical methods such as Zata potential, SEM, EDX and XPS were used to investigate the mechanism of action of the collector on the mineral surface, which confirmed the adsorption of this collector on the surface of dolomite and fluorapatite is chemical adsorption.
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Key words:
- phosphate ore /
- fluorapatite /
- dolomite /
- sulfo fatty acid /
- flotation
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表 1 α-磺酸基棕榈酸钠的1H-NMR谱图解析结果
Table 1. 1H-NMR spectra analysis results of sodium α-sulfonate palmitate
编号 化学位移 分裂峰 质子数目 1 0.876 单峰 3 2 1.252 单峰 24 3 2.237 三重峰 2 4 3.545 单峰 1 
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