To extract V⁵⁺ ions from the ferruginous siltstone in the Abu Zeneima region of Southwestern Sinai, Egypt, a chelating polyimine ligand (PVAm-Ben) was synthesized via a condensation reaction involving polyvinyl amine and α-hydroxy ketone (Benzoin). The structure of PVAm-Ben underwent comprehensive characterization employing various techniques, namely; FT-IR, ¹H-NMR, ¹³C-NMR, and GC/MS analyses. Experimental factors controlling such as pH, time, initial concentration, dosage, temperature, and stripping, were systematically optimized to enhance measurement accuracy. Under conditions of 25°C, 0.015 mol/L, and 30 minutes, PVAm-Ben/C₂H₄Cl₂ exhibited remarkable retention capacity at pH 3. Linear regression analysis results suggested the release of a mole of H⁺ during the extraction process. The stability constant (log β = 2.1882) of the PVAm-Ben/V⁵⁺ complex was determined, yielding a value of 154.24. The stoichiometry mechanism between PVAm-Ben and V⁵⁺ ions displayed a linear correlation (slope: 0.9922), signifying 1 mole of PVAm-Ben reacting with 1 mole of vanadium. The pseudo-second-order kinetic model indicated an exothermic, spontaneous, and advantageous extraction process at low temperatures. Efficient stripping of PVAm-Ben/C₂H₄Cl₂ loaded with vanadium was achieved using 0.05 M NaOH with a 99% efficiency rate. Ultimately, enhanced variables were employed to yield a V₂O₅ concentrate with a vanadium content of 55% and a purity level of 98.21%.

中文翻译：

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通过新型聚亚胺螯合配体从埃及西奈半岛西南部的 Abu Zeneima 铁质粉砂岩中高效回收钒

为了从埃及西奈半岛西南部 Abu Zeneima 地区的含铁粉砂岩中提取 V ⁵⁺离子，通过聚乙烯胺和 α-羟基酮（安息香）的缩合反应合成了螯合聚亚胺配体（PVAm-Ben）。采用多种技术对 PVAm-Ben 的结构进行了全面表征，即： FT-IR、¹ H-NMR、¹³ C-NMR 和 GC/MS 分析。对pH、时间、初始浓度、剂量、温度和剥离等实验因素进行系统优化，以提高测量精度。在25℃、0.015 mol/L、30 min的条件下，PVAm-Ben/C ₂ H ₄ Cl ₂在pH 3下表现出显着的保留能力。线性回归分析结果表明萃取过程中释放了1摩尔H ⁺过程。测定了PVAm-Ben/V ⁵⁺复合物的稳定性常数(log β = 2.1882) ，得出的值为154.24。 PVAm-Ben和V ⁵⁺离子之间的化学计量机制显示出线性相关性(斜率：0.9922)，表示1摩尔PVAm-Ben与1摩尔钒反应。准二级动力学模型表明低温下是放热的、自发的且有利的萃取过程。使用0.05 M NaOH实现了负载钒的PVAm-Ben/C ₂ H ₄ Cl ₂的有效反萃，效率为99%。最终，采用增强的变量生产出钒含量为55%、纯度为98.21%的V ₂ O _5精矿。