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Experimental Determination of Phase Equilibria in the Quaternary NaOH-Na3VO4-Na2MoO4-H2O System at 298.15–353.15 K
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-12-22 , DOI: 10.1021/acs.jced.0c00321 Shaona Wang 1 , Jianzhang Wang 2 , Biao Liu 1 , Yeqing Lv 1 , Yi Zhang 1 , Hao Du 1, 3
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-12-22 , DOI: 10.1021/acs.jced.0c00321 Shaona Wang 1 , Jianzhang Wang 2 , Biao Liu 1 , Yeqing Lv 1 , Yi Zhang 1 , Hao Du 1, 3
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The equilibrium solubility of the quaternary NaOH-Na3VO4-Na2MoO4-H2O system was investigated from 298.15 to 353.15 K using an isothermal equilibrium method. From the results, the solubility of Na3VO4 decreased appreciably as temperature decreased. The solubility of Na2MoO4 decreased sharply as the NaOH concentration increased, and the effect of temperature on the Na2MoO4 solubility was not obvious. The dry-salt phase diagram of the system consists of three crystallization zones (where the solid phases are Na3VO4·12H2O at 298.15 K and Na3VO4·3H2O at 313.15–353.15 K, Na2MoO4·2H2O, and NaOH·H2O). The solubilities of Na3VO4 and Na2MoO4 were compared with those of their ternary subsystems of NaOH-Na3VO4-H2O and NaOH-Na2MoO4-H2O, respectively. Na2MoO4 has a strong salting-out effect on Na3VO4 solubility when the NaOH concentration was smaller than approximately 30 wt %. The addition of Na3VO4 has almost no salting-out effect on the Na2MoO4 solubility especially when the NaOH concentration was above 20 wt %.
中文翻译：
在第四纪相平衡的实验测定的NaOH娜3 VO 4 -Na 2的MoO 4 -H 2 O不连到298.15-353.15ķ系统
采用等温平衡法研究了季铵NaOH-Na 3 VO 4 -Na 2 MoO 4 -H 2 O体系的平衡溶解度，从298.15至353.15K。结果表明，Na 3 VO 4的溶解度随温度降低而明显降低。Na 2 MoO 4的溶解度随NaOH浓度的增加而急剧下降，温度对Na 2 MoO 4溶解度的影响不明显。系统的干盐相图由三个结晶区组成（其中固相为Na 3 VO 4· 298.15 K时的12H 2 O和313.15–353.15 K时的Na 3 VO 4 ·3H 2 O，Na 2 MoO 4 ·2H 2 O和NaOH·H 2 O）。将Na 3 VO 4和Na 2 MoO 4的溶解度分别与它们的NaOH-Na 3 VO 4 -H 2 O和NaOH-Na 2 MoO 4 -H 2 O三元子系统的溶解度进行比较。Na 2 MoO 4对Na 3 VO 4具有很强的盐析作用当NaOH浓度小于约30wt％时溶解度降低。Na 3 VO 4的添加对Na 2 MoO 4的溶解度几乎没有盐析作用，特别是当NaOH浓度高于20 wt％时。
更新日期：2021-01-14
中文翻译：
在第四纪相平衡的实验测定的NaOH娜3 VO 4 -Na 2的MoO 4 -H 2 O不连到298.15-353.15ķ系统
采用等温平衡法研究了季铵NaOH-Na 3 VO 4 -Na 2 MoO 4 -H 2 O体系的平衡溶解度，从298.15至353.15K。结果表明，Na 3 VO 4的溶解度随温度降低而明显降低。Na 2 MoO 4的溶解度随NaOH浓度的增加而急剧下降，温度对Na 2 MoO 4溶解度的影响不明显。系统的干盐相图由三个结晶区组成（其中固相为Na 3 VO 4· 298.15 K时的12H 2 O和313.15–353.15 K时的Na 3 VO 4 ·3H 2 O，Na 2 MoO 4 ·2H 2 O和NaOH·H 2 O）。将Na 3 VO 4和Na 2 MoO 4的溶解度分别与它们的NaOH-Na 3 VO 4 -H 2 O和NaOH-Na 2 MoO 4 -H 2 O三元子系统的溶解度进行比较。Na 2 MoO 4对Na 3 VO 4具有很强的盐析作用当NaOH浓度小于约30wt％时溶解度降低。Na 3 VO 4的添加对Na 2 MoO 4的溶解度几乎没有盐析作用，特别是当NaOH浓度高于20 wt％时。
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