CAJ | 학술논문

等温溶解平衡法测定了283.2～323.2 K溢度范围内NaCl在Zn(Ⅱ)-NaOH-H_2O体系(c_(Zn(Ⅱ))=0.6 mol/L、C_(NaOH)=5.00mol/L)及NaOH-H_2O体系(c_(NaOH)-5.00 mol/L)中的溶解度.与NaOH-H_2O、纯水体系相比,相同温度下NaCl在Zn(Ⅱ)-NaOH-H_2O体系中溶解度最小.运用正交实验法对zn(Ⅱ)-NaOH-H_2O体系中NaCl的溶解度进行因素分析.结果表明,较高的c_(NaOH)和c_(Zn(Ⅱ))是造成NaCl溶解度急剧降低的主要原因,提高温度虽然对NaCl的溶解有促进作用但影响较小.最后,通过加热浓缩方式提高溶液NaOH和Zn的浓度,促使NaCl因溶解度骤降而结晶析出,首次实现了碱锌溶液中高浓度Cl~-的大量去除.实验结果具有重要的工程应用价值.
등온용해평형법측정료283.2～323.2 K일도범위내NaCl재Zn(Ⅱ)-NaOH-H_2O체계(c_(Zn(Ⅱ))=0.6 mol/L、C_(NaOH)=5.00mol/L)급NaOH-H_2O체계(c_(NaOH)-5.00 mol/L)중적용해도.여NaOH-H_2O、순수체계상비,상동온도하NaCl재Zn(Ⅱ)-NaOH-H_2O체계중용해도최소.운용정교실험법대zn(Ⅱ)-NaOH-H_2O체계중NaCl적용해도진행인소분석.결과표명,교고적c_(NaOH)화c_(Zn(Ⅱ))시조성NaCl용해도급극강저적주요원인,제고온도수연대NaCl적용해유촉진작용단영향교소.최후,통과가열농축방식제고용액NaOH화Zn적농도,촉사NaCl인용해도취강이결정석출,수차실현료감자용액중고농도Cl~-적대량거제.실험결과구유중요적공정응용개치.
The solubility of NaCl in Zn(Ⅱ)-NaOH-H_2O system(c_(Zn(Ⅱ)) = 0. 6 mol/L、c_(NaOH) = 5. 00 mol/L) and in NaOH-H_2O system(c_(NaOH)=5. 00 mol/L) at 283. 2-323. 2 K were determined by the isothermal solution equilibrium method. It was found that NaCl solubility in Zn( Ⅱ )-NaOH-H_2O system was much lower than that of pure water and NaOH-H_2O system at same temperature. Orthogonal experiment was then used to evaluate the effect of such factors on NaCl solubility. Results showed that high concentration of NaOH and Zn( Ⅱ ) was the key factor of NaCl solubility sharply decreasing, temperature had positive effect on NaCl dissolve but the influence was not significant. The concentration of NaOH and Zn( Ⅱ ) could be increased by heating Zn( Ⅱ )-NaOH-H_2O system so as to decrease the NaCl solubility and separate NaCl crystals out. The method achieved chlorion removal from alkaline-leach electrolyte, which provided important practical value for zinc powder production.