2024年6月2日发(作者：厉怜南)
碳酸锂在水中的溶解度和超溶解度的测定及热力学分析
宋昌斌;李润超
【期刊名称】《化工进展》
【年(卷),期】2016(035)008
【摘 要】固体溶质在溶剂中的溶解度和超溶解度数值决定了结晶介稳区的宽度，
而溶质结晶分离过程又是在介稳区中进行操作，因此固体溶质的溶解度和超溶解度
在工业结晶中是很重要的基础数据。本文以碳酸锂为溶质，在标准压力条件和
283.15～318.15K温度条件下，用重量分析法测定其在水中的溶解度；用激光动
态法测定其在一定温度条件下在水中的超溶解度，从而得到碳酸锂在水溶液中的介
稳区；结果显示，碳酸锂在水中的溶解度和超溶解度均随温度的升高而减小，介稳
区宽度随温度的升高而变窄；其溶解度数据用Van’t Hoff方程和修正的
Apelblat方程进行了热力学关联计算，结果表明，两种热力学模型对碳酸锂在水
中溶解度的关联效果都很好，其中Van’t Hoff方程和修正的Apelblat方程的计
算值与实验值的平均相对偏差分别为0.54%和0.20%。通过溶解热力学计算，得
到碳酸锂在水中的溶解焓∆Hd、熔解熵ΔSd和溶液标准吉布斯自由能变∆Gd，结
果表明该溶解过程为放热熵减小的非自发过程，并且溶解熵变对溶解过程的影响较
大。%The solubility and supersolubility determines the width of the
metastable state and the crystallization process is operated in the
metastable zone. Therefore,the solubility and supersolubility are an
important basic data in industrial crystallization process. In this
study,lithium carbonate was used as solute and the solubility of lithium
carbonate in water was measured at (283.15 to 318.15) K and atmospheric
pressure by using a gravimetric method. The supersolubility was measured
by using a laser dynamic method. It was obviously showed that the
solubility and supersolubility of lithium carbonate in water and the width
of the metastable zone decreased with increasing temperature. The
solubility data was correlated by Van’t Hoff equation and modified
Apelblat equation. The results indicated that the solubility of calculated
values was in good agreement with the experimental values. The average
relative deviation of the Van’t Hoff equation and the modified Apelblat
equation were 0.54% and 0.20%,respectively. The changes of
enthalpy(ΔHd),entropy(ΔSd)and Gibbs free energy (ΔGd)of the dissolving
process were obtained by the thermodynamic calculation. The dissolving
process was a non-spontaneous process of exothermic and Entropy. The
entropy change was the main influencing factor in the dissolution process.
【总页数】5页(P2350-2354)
【作 者】宋昌斌;李润超
【作者单位】青海盐湖镁业有限公司，青海格尔木 816099;北京四中，北京
100088
【正文语种】中 文
【中图分类】TQ013.1
【相关文献】
1.反气相色谱法与Hansen溶解度参数法测定聚乙烯醇溶解度参数及相关热力学性
质 [J], 倪海月;任世学;方桂珍;马艳丽
2.天然气在水中的溶解度计算I.热力学模型 [J], 左有祥;郭天民
3.碳酸锂在碳酸钠溶液中的溶解度与热力学 [J], 戈海文;王怀有;王敏
4.碳酸锂在氯化钠溶液中溶解度的测定 [J], 戈海文;王怀有;王敏
5.碳酸锂在水和NaCl-KCl溶液体系中溶解度的在线测定 [J], 王斌;邓小川;史一飞;
董超超;樊发英;朱朝梁;樊洁
因版权原因，仅展示原文概要，查看原文内容请购买
2024年6月2日发(作者：厉怜南)
碳酸锂在水中的溶解度和超溶解度的测定及热力学分析
宋昌斌;李润超
【期刊名称】《化工进展》
【年(卷),期】2016(035)008
【摘 要】固体溶质在溶剂中的溶解度和超溶解度数值决定了结晶介稳区的宽度，
而溶质结晶分离过程又是在介稳区中进行操作，因此固体溶质的溶解度和超溶解度
在工业结晶中是很重要的基础数据。本文以碳酸锂为溶质，在标准压力条件和
283.15～318.15K温度条件下，用重量分析法测定其在水中的溶解度；用激光动
态法测定其在一定温度条件下在水中的超溶解度，从而得到碳酸锂在水溶液中的介
稳区；结果显示，碳酸锂在水中的溶解度和超溶解度均随温度的升高而减小，介稳
区宽度随温度的升高而变窄；其溶解度数据用Van’t Hoff方程和修正的
Apelblat方程进行了热力学关联计算，结果表明，两种热力学模型对碳酸锂在水
中溶解度的关联效果都很好，其中Van’t Hoff方程和修正的Apelblat方程的计
算值与实验值的平均相对偏差分别为0.54%和0.20%。通过溶解热力学计算，得
到碳酸锂在水中的溶解焓∆Hd、熔解熵ΔSd和溶液标准吉布斯自由能变∆Gd，结
果表明该溶解过程为放热熵减小的非自发过程，并且溶解熵变对溶解过程的影响较
大。%The solubility and supersolubility determines the width of the
metastable state and the crystallization process is operated in the
metastable zone. Therefore,the solubility and supersolubility are an
important basic data in industrial crystallization process. In this
study,lithium carbonate was used as solute and the solubility of lithium
carbonate in water was measured at (283.15 to 318.15) K and atmospheric
pressure by using a gravimetric method. The supersolubility was measured
by using a laser dynamic method. It was obviously showed that the
solubility and supersolubility of lithium carbonate in water and the width
of the metastable zone decreased with increasing temperature. The
solubility data was correlated by Van’t Hoff equation and modified
Apelblat equation. The results indicated that the solubility of calculated
values was in good agreement with the experimental values. The average
relative deviation of the Van’t Hoff equation and the modified Apelblat
equation were 0.54% and 0.20%,respectively. The changes of
enthalpy(ΔHd),entropy(ΔSd)and Gibbs free energy (ΔGd)of the dissolving
process were obtained by the thermodynamic calculation. The dissolving
process was a non-spontaneous process of exothermic and Entropy. The
entropy change was the main influencing factor in the dissolution process.
【总页数】5页(P2350-2354)
【作 者】宋昌斌;李润超
【作者单位】青海盐湖镁业有限公司，青海格尔木 816099;北京四中，北京
100088
【正文语种】中 文
【中图分类】TQ013.1
【相关文献】
1.反气相色谱法与Hansen溶解度参数法测定聚乙烯醇溶解度参数及相关热力学性
质 [J], 倪海月;任世学;方桂珍;马艳丽
2.天然气在水中的溶解度计算I.热力学模型 [J], 左有祥;郭天民
3.碳酸锂在碳酸钠溶液中的溶解度与热力学 [J], 戈海文;王怀有;王敏
4.碳酸锂在氯化钠溶液中溶解度的测定 [J], 戈海文;王怀有;王敏
5.碳酸锂在水和NaCl-KCl溶液体系中溶解度的在线测定 [J], 王斌;邓小川;史一飞;
董超超;樊发英;朱朝梁;樊洁
因版权原因，仅展示原文概要，查看原文内容请购买