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过程工程学报 ›› 2018, Vol. 18 ›› Issue (2): 399-404.DOI: 10.12034/j.issn.1009-606X.217319

• 过程与工艺 • 上一篇    下一篇

矿浆pH值对含苯环螯合捕收剂在金红石表面吸附速率的影响

刘明宝1,2*， 鱼 博1,2， 印万忠3   

  1. 1. 商洛学院化学工程与现代材料学院，陕西 商洛 726000；2. 陕西省尾矿资源综合利用重点实验室，陕西 商洛 726000； 3. 东北大学资源与土木工程学院，辽宁 沈阳 110004
  • 收稿日期:2017-08-31 修回日期:2017-09-29 出版日期:2018-04-22 发布日期:2018-04-10
  • 通讯作者: 刘明宝 lmb74@163.com
  • 基金资助:
    羟肟酸和脂肪酸类捕收剂在金红石表面吸附的热动力学机制

Effects of Slurry pH on Adsorption Rate of Chelating Collectors Containing Benzene Ring onto Rutile Surface

Mingbao LIU1,2*,  Bo YU1,2,  Wanzhong YIN3     

  1. 1. College of Chemical Engineering and Modern Material, Shangluo University, Shangluo, Shaanxi 726000, China; 2. Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo, Shaanxi 726000, China; 3. College of Resources and Civil Engineering, Northeasten University, Shenyang, Liaoning 110004, China
  • Received:2017-08-31 Revised:2017-09-29 Online:2018-04-22 Published:2018-04-10

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摘要： 考察了pH和搅拌时间对含苯环螯合捕收剂N-亚硝基苯胲铵和N-亚硝基萘胲铵在金红石表面吸附速率的影响，研究了吸附动力学，进行了量子化学及立体化学分析. 结果表明，N-亚硝基萘胲铵在金红石表面的最大吸附量大于N-亚硝基苯胲铵，但N-亚硝基苯胲铵在金红石表面的吸附速率大于N-亚硝基萘胲铵. 两种药剂的吸附均符合准一级动力学方程，矿物表面活性点离子在矿物表膜中的扩散为吸附的控制步骤. N-亚硝基萘胲铵分子中苯环具有吸电子共轭效应，会影响键合原子的电子云密度和分子结构，从而影响药剂的吸附速率和吸附量.

关键词: 吸附, 动力学, 分子结构

Abstract: The effects of slurry pH and stirring time on adsorption rate of chelating collectors containing benzene, namely cupferron and neocupferron, onto rutile surface were researched. Adsorption kinetics, quantum chemistry and stereochemistry were studies. The results showed that the maximum adsorption capacity of neocupferron on rutile was higher than that of cupferron, but the adsorption rate was in the reverse order. The pseudo-first order kinetic equation can fit the adsorption isotherms well for both reagents. The diffusion of activity sites in mineral surface film was the rate-limited step during the adsorption. The number of benzene ring in the molecule can affect the electron cloud density on the bonding atoms and the molecular structure, and then influence the adsorption capacity and rate of the reagents.

Key words: adsorption, kinetics, molecular structure