六水合氯化铝在不同氯化物体系中的溶解度现象研究  

Study on solubility phenomena of AlCl_3·6H_2O in different chloride systems

作　　者：崔慧霞[1] 程文婷[1] 郭彦霞[1] 程芳琴[1] 

机构地区：[1]山西大学资源与环境工程研究所,环境与资源学院,国家环境保护煤炭废弃物资源化高效利用技术重点实验室,山西太原030006

出　　处：《无机盐工业》2013年第5期9-12,共4页Inorganic Chemicals Industry

基　　金：国家高技术研究发展计划(863计划)(2011AAQ6A103);国家国际合作项目(2011DFA90830)

摘　　要：以煤矸石酸浸滤液中六水合氯化铝的结晶为背景,以OLI软件为平台,用软件中嵌入的Bromley-Ze-maitis活度系数模型预测了温度范围为10～70℃、溶液浓度为0～17 mol/kg的条件下,六水合氯化铝分别在水、氯化钠、氯化钾、盐酸体系中的溶解度,并将预测结果同文献数据作了比较。结果表明,在水、氯化钠和氯化钾溶液中,温度和溶液浓度对六水合氯化铝溶解度的影响均可忽略;在盐酸溶液中,温度对六水合氯化铝溶解度的影响可忽略,但随着盐酸浓度的增大,六水合氯化铝的溶解度急剧降低。比较可知预测值与文献值吻合较好,说明Bromley-Ze-maitis活度系数模型可以作为研究手段用于预测六水合氯化铝在上述4个体系中的溶解度,为六水合氯化铝的工业结晶过程提供相平衡的预测。Based on the crystallization of AlCl3·6H2O in the acid-leaching filtrate of gangue, the activity coefficients model of Bromley-Zemaitis in software OLI can be used to predict the solubilities of AlCl3·6H2O in different systems, such as HC1, NaC1, KC1, and H20, under the conditions of different temperatures （10-70 ℃ ） and concentrations （0-17 mol/kg）.Meanwhile predicting values were compared with the literature ones.Results showed that in the solutions of H20,NaCl,and KC1, temperature and solution concentration had little influence on the solubility of A1C13＂ 6H20, and so did the temperature in the solution HC1.But with the increase of the concentration of HCl,the solubility of AlCl3·6H2Oreduced sharply.The predicting values were similar to the literature ones.It demonstrated that the activity coefficients model of Bromley-Zemaitis in software OLI could be used to predict the solubilities of AlCl3·6H2O in the above mentioned 4 systems.It could provide phase equilibrium prediction for industrial crystallization AlCl3·6H2O.

关 键 词：六水合氯化铝 溶解度 Bromley—Zemaitis活度系数模型 

分 类 号：TQ133.1[化学工程—无机化工]