Solid-liquid equilibria of quaternary system Na<sup>+</sup>//<inline-formula><alternatives><math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M4"><mi mathvariant="bold">S</mi><msubsup><mrow><mi mathvariant="bold">O</mi></mrow><mrow><mn mathvariant="normal">4</mn></mrow><mrow><mn mathvariant="normal">2</mn><mo>-</mo></mrow></msubsup></math><graphic specific-use="big" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="alternativeImage/6e2c0a4e-935b-4ec7-b03a-c9d483ee1525-M013.jpg"><?fx-imagestate width="9.99066734" height="5.41866684"?></graphic><graphic specific-use="small" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="alternativeImage/6e2c0a4e-935b-4ec7-b03a-c9d483ee1525-M013c.jpg"><?fx-imagestate width="9.99066734" height="5.41866684"?></graphic></alternatives></inline-formula>,<inline-formula><alternatives><math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M5"><mtext> </mtext><mi mathvariant="bold">C</mi><msubsup><mrow><mi mathvariant="bold">O</mi></mrow><mrow><mn mathvariant="normal">3</mn></mrow><mrow><mn mathvariant="normal">2</mn><mo>-</mo></mrow></msubsup></math><graphic specific-use="big" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="alternativeImage/6e2c0a4e-935b-4ec7-b03a-c9d483ee1525-M014.jpg"><?fx-imagestate width="11.42999935" height="5.41866684"?></graphic><graphic specific-use="small" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="alternativeImage/6e2c0a4e-935b-4ec7-b03a-c9d483ee1525-M014c.jpg"><?fx-imagestate width="11.42999935" height="5.41866684"?></graphic></alternatives></inline-formula>, <inline-formula><alternatives><math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M6"><mi mathvariant="bold">N</mi><msubsup><mrow><mi mathvariant="bold">O</mi></mrow><mrow><mn mathvariant="normal">3</mn></mrow><mrow><mo>-</mo></mrow></msubsup></math><graphic specific-use="big" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="alternativeImage/6e2c0a4e-935b-4ec7-b03a-c9d483ee1525-M015.jpg"><?fx-imagestate width="8.63599968" height="5.41866684"?></graphic><graphic specific-use="small" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="alternativeImage/6e2c0a4e-935b-4ec7-b03a-c9d483ee1525-M015c.jpg"><?fx-imagestate width="8.63599968" height="5.41866684"?></graphic></alternatives></inline-formula>-H<sub>2</sub>O at 313.15 K

REN Yongsheng; CAO Jing; YU Bingjie

doi:10.11949/0438-1157.20181517

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Solid-liquid equilibria of quaternary system Na⁺//

S O_{4}^{2 -}

C O_{3}^{2 -}

N O_{3}^{-}

-H₂O at 313.15 K

Thermodynamics | 更新时间：2026-07-24

- Solid-liquid equilibria of quaternary system Na⁺// $S O_{4}^{2 -}$ , $C O_{3}^{2 -}$ , $N O_{3}^{-}$ -H₂O at 313.15 K
- CIESC Journal Vol. 70, Issue 6, Pages: 2102-2109(2019)
- 作者机构：
  
  1. 省部共建煤炭高效利用与绿色化工国家重点实验室，宁夏银川 750021
  2. 宁夏大学化学化工学院，宁夏银川 750021
  3. 宁夏大学化学化工学院化学国家级实验教学示范中心(宁夏大学)，宁夏银川 750021
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20181517
  CLC： O 642
- Received：26 December 2018，
  
  Revised：2019-04-08，
  
  Online First：15 June 2020，
  
  Published：05 June 2019
- 稿件说明：
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任永胜, 曹晶, 于冰洁. 313.15 K四元体系Na⁺// S O 4 2 - ， C O 3 2 - ， N O 3 - -H₂O固液相平衡研究[J]. 化工学报, 2019, 70(6): 2102-2109 DOI: 10.11949/0438-1157.20181517.

REN Yongsheng, CAO Jing, YU Bingjie. Solid-liquid equilibria of quaternary system Na⁺// S O 4 2 - ， C O 3 2 - ， N O 3 - -H₂O at 313.15 K[J]. CIESC Journal, 2019, 70(6): 2102-2109 DOI: 10.11949/0438-1157.20181517.
任永胜, 曹晶, 于冰洁. 313.15 K四元体系Na⁺// S O 4 2 - ， C O 3 2 - ， N O 3 - -H₂O固液相平衡研究[J]. 化工学报, 2019, 70(6): 2102-2109 DOI: 10.11949/0438-1157.20181517. DOI：

REN Yongsheng, CAO Jing, YU Bingjie. Solid-liquid equilibria of quaternary system Na⁺// S O 4 2 - ， C O 3 2 - ， N O 3 - -H₂O at 313.15 K[J]. CIESC Journal, 2019, 70(6): 2102-2109 DOI: 10.11949/0438-1157.20181517. DOI：

Solid-liquid equilibria of quaternary system Na⁺//

S O_{4}^{2 -}

C O_{3}^{2 -}

N O_{3}^{-}

-H₂O at 313.15 K

PDF Download

摘要

采用等温溶解法研究313.15 K下四元体系Na

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6.43466663

3.47133350

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6.77333355

3.47133350

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5.41866684

3.47133350

-H

O的固液相平衡关系。测定了平衡溶液的溶解度数据及物理性质数据，包括密度、黏度、折射率。根据实验数据，绘制了相应的干盐相图、水图及物理性质-组成图。实验结果表明：313.15 K下，此四元体系相图包括两个共饱和点，六条单变曲线以及五个单盐结晶区域(分别为NaNO

，Na

·H

Bur(Na

·2Na

)，Da(NaNO

·Na

·H

O))，其中Bur的结晶区域最大，最容易从混合溶液中结晶析出。实验中的物理性质(黏度、密度、折射率)随

(Na

)的变化呈现相似性规律。该体系中存在复盐碱芒硝Bur(Na

·2Na

)、钠硝矾Da(NaNO

·Na

·H

O)，结晶水合物(Na

·H

O)，没有固溶体存在，故该体系是一个复杂的共饱和型。实验所获数据和结论对煤化工过程产生的高盐废水结晶析盐工艺开发及实现资源梯级综合利用具有重要意义。

Abstract

An experimental study on phase equilibria of the system Na

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7.19666672

4.06400013

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911694&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911708&type=

7.62000036

4.06400013

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911710&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911673&type=

6.18066692

4.06400013

-H

O at 313.15K was done by the method of isothermal solution saturation. The solubility and physical properties (

) of the equilibrium quaternary system were measured

and the corresponding phase diagram

water diagram and physical property (

) diagram were obtained based on the data measured. The results show that: the phase diagram of Na

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911711&type=

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7.19666672

4.06400013

，

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911712&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911697&type=

7.62000036

4.06400013

，

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911713&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113911698&type=

6.18066692

4.06400013

-H

O at 313.15 K consists of two invariant points

six univariant curves

and five crystallization regions which are NaNO

，Na

·H

Bur(Na

·2Na

)

and Da(NaNO

·Na

·H

respectively. The Bur crystallization field occupies the largest part

which indicates it is easier to crystallize in the mixing solution. All the physical properties (

) change regularly with

(Na

) composition. Bur(Na

·2Na

)

Da(NaNO

·Na

·H

O) and crystalline hydrate (Na

·H

O) are proven to co-exist in the quaternary system

whereas no solid solution is found in the temperature range investigated

which means the reciprocal quaternary system is a complex eutectic type. The data and conclusions obtained from the experiment are of great significance for the development of crystallization salt separation process of high salt wastewater produced by coal chemical process and the realization of comprehensive utilization of resources.

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references

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Solid-liquid equilibria of quaternary system Na+//SO42-, CO32-, NO3--H2O at 313.15 K

DOI：10.11949/0438-1157.20181517

摘要

Abstract

关键词

Keywords

references

Solid-liquid equilibria of quaternary system Na⁺// $S O_{4}^{2 -}$ , $C O_{3}^{2 -}$ , $N O_{3}^{-}$ -H₂O at 313.15 K