Phase equilibria in quinary system NaBr-KBr-MgBr2-CaBr2-H2O at 298 K and 323 K

doi:10.11949/0438-1157.20190244

Abstract

Abstract:

According to the multi-component system Na-K-Ca-Mg-Sr-Li-Cl-B₄O₇-Br-SO₄-I-H₂O of underground brine in Sichuan basin, the phase equilibrium relationships of quinary systems NaBr-KBr-MgBr₂-CaBr₂-H₂O at 298 and 323 K were studied by isothermal solution equilibrium method, the solubilities of the equilibria solution of the quinary system were determined under the corresponding temperatures, and the corresponding phase diagrams were plotted according to the phase equilibrium experiment data (saturated with KBr). The results of research show that the quinary system has complex salt at 298 K and 323 K. There is complex salt KBr·MgBr₂·6H₂O formation at 298 K and the phase diagram contains two co-saturated points, five dissolution isotherms and four solid crystallization regions (corresponding to KBr·MgBr₂·6H₂O, NaBr·2H₂O, NaBr and CaBr₂·6H₂O, respectively). There are two kinds of complex salts KBr·MgBr₂·6H₂O and 2MgBr₂·CaBr₂·12H₂O formation at 323 K and the phase diagram contains three co-saturated points, seven dissolution isotherms and five solid crystallization regions (corresponding to KBr·MgBr₂·6H₂O, NaBr·2H₂O, NaBr, CaBr₂·4H₂O and 2MgBr₂·CaBr₂·12H₂O, respectively).

Key words: phase equilibria, Sichuan basin, underground brine, solubility, bromide

摘要：

针对四川盆地地下卤水富含钾、溴资源的特点，采用等温溶解平衡法研究了五元体系NaBr-KBr-MgBr₂-CaBr₂-H₂O在298 K和323 K时的相平衡关系，测定了该五元体系在相应温度条件下平衡溶液的溶解度，根据相平衡实验数据绘制相应的干盐相图(KBr饱和)。研究结果表明：该五元体系在298 K和323 K条件下(KBr饱和)均有复盐生成，其中298 K温度下有复盐KBr·MgBr₂·6H₂O生成，相图中含有两个共饱点，五条单变量曲线和四个结晶区(KBr·MgBr₂·6H₂O、NaBr·2H₂O、NaBr、CaBr₂·6H₂O的结晶区)；323 K温度下有两种复盐KBr·MgBr₂·6H₂O、2MgBr₂·CaBr₂·12H₂O生成，相图中含有三个共饱点，七条单变量曲线和五个结晶区(KBr·MgBr₂·6H₂O、NaBr·2H₂O、NaBr、CaBr₂·4H₂O、2MgBr₂·CaBr₂·12H₂O的结晶区)。同时，对该五元体系在两个不同温度下的相图、KBr图以及水含量图进行了对比分析。

关键词: 相平衡, 四川盆地, 地下卤水, 溶解度, 溴化物

CLC Number:

O 642

Guoliang NIE, Shihua SANG, Ruizhi CUI. Phase equilibria in quinary system NaBr-KBr-MgBr₂-CaBr₂-H₂O at 298 K and 323 K[J]. CIESC Journal, 2019, 70(9): 3267-3274.

聂国亮, 桑世华, 崔瑞芝. 298 K和323 K条件下五元体系NaBr-KBr-MgBr₂-CaBr₂-H₂O相平衡研究[J]. 化工学报, 2019, 70(9): 3267-3274.

Figures/Tables 8

References 32

1	郑绵平, 齐文, 张永生 . 中国钾盐地质资源现状与找钾方向初步分析[J]. 地质通报, 2006, 25(11): 1239-1246.
	Zheng M P , Qi W , Zhang Y S . Present situation of potash resources and direction of potash search in China[J]. Geological Bulletin of China, 2006, 25(11): 1239-1246.
2	林耀庭 . 四川地下卤水资源优势及综合开发前景[J]. 盐湖研究, 2006, 14(4): 1-8.
	Lin Y T . Resource advantages of the underground brines of Sichuan basin and the outlook of their comprehensive exploitation[J]. Journal of Salt Lake Research, 2006, 14(4): 1-8.
3	郑绵平, 侯献华, 于常青, 等 . 成盐理论引领我国找钾取得重要进展[J]. 地球学报, 2015, 36(2): 129-139.
	Zheng M P , Hou X H , Yu C Q , et al . The leading role of salt formation theory in the breakthrough and important progress in potash deposit prospecting[J]. Acta Geoscientica Sinica, 2015, 36(2): 129-139.
4	侯献华, 樊馥, 郑绵平, 等 . 青海盐湖钾盐资源开发利用及产业发展[J]. 科技导报, 2017, 35(12): 67-71.
	Hou X H , Fan F , Zheng M P , et al . Development and utilization of potash resources of saline lakes in Qinghai[J]. Science & Technology Review, 2017, 35(12): 67-71.
5	李文光 . 我国钾盐资源的开发利用[J]. 盐湖研究, 1994, 2(3): 65-68.
	Li W G . Comprehensive utilization of our potash resource[J]. Journal of Salt Lake Research, 1994, 2(3): 65-68.
6	林耀庭 . 我国卤水溴资源及其开发前景展望[J]. 盐湖研究, 2000, 8(2): 59-67.
	Lin Y T . Bromine resource in brines and its exploitation prospect[J]. Journal of Salt Lake Research, 2000, 8(2): 59-67.
7	朱建华, 马淑芬, 刘红研 . 溴素生产应用现状分析及展望[J]. 矿产综合利用, 2004, (2): 36-41.
	Zhu J H , Ma S F , Liu H Y . Analysis and prospects for present status of production and utilization of bromine[J]. Multipurpose Utilization of Mineral Resources, 2004, (2): 36-41.
8	陈向楠, 王海增 . 溴素资源与产业发展分析[J]. 盐业与化工, 2013, 42(6): 4-7.
	Chen X N , Wang H Z . Bromine resource and analysis of the industry development[J]. Journal of Salt and Chemical Industry, 2013, 42(6): 4-7.
9	Balarew C , Christov C , Valyashko V , et al . Thermodynamics of formation of Carnallite type double salts[J]. Journal of Solution Chemistry, 1993, 22: 173-181.
10	Christov C . Study of bromide salts solubility in the (m ₁KBr + m ₂CaBr₂)_(aq) system at T = 323.15 K. Thermodynamic model of solution behaviour and (solid + liquid) equilibria in theternaries (m ₁KBr + m ₂CaBr₂)_(aq), and (m ₁MgBr₂ + m ₂CaBr₂)_(aq), and in the quinary (Na + K + Mg + Ca + Br + H₂O) systems to high concentration and temperature[J]. J. Chem. Thermodynamics, 2012, 55: 7-22.
11	翁延博, 王静康, 尹秋响, 等 . NaCl-NaBr-H₂O三组分物系的固液平衡[J]. 石油化工, 2007, 36(4): 358-361.
	Weng Y B , Wang J K , Yin Q X , et al . Solid-liquid equilibrium of NaCl-NaBr-H₂O ternary system[J]. Petrochemical Technology, 2007, 36(4): 358-361.
12	翁延博, 王彦飞, 王静康, 等 . K⁺/Cl^-, Br^--H₂O三元体系298 K, 313 K, 333 K时的相平衡[J]. 高校化学工程学报, 2007, 21(4): 695-699.
	Weng Y B , Wang Y F , Wang J K , et al . Phase diagram for the ternary system of K⁺/Cl^-, Br^--H₂O at 298 K, 313 K and 333 K[J]. Journal of Chemical Engineering of Chinese Universities, 2007, 21(4): 695-699.
13	Christov C . Isopiestic investigation of the osmotic coefficients of MgBr_2(aq) and study of bromide salts solubility in the (m ₁KBr + m ₂MgBr₂)_(aq)system at T = 323.15 K. Thermodynamic model of solution behaviour and (solid + liquid) equilibria in the MgBr_2(aq), and (m ₁KBr + m ₂MgBr₂)_(aq) systems to high concentration and temperature[J]. J. Chem. Thermodynamics, 2011, 43: 344-353.
14	Hu J X , Sang S H , Zhou M F , et al . Phase equilibria in the ternary systems KBr-MgBr₂-H₂O and NaBr-MgBr₂-H₂O at 348.15K[J]. Fluid Phase Equilibria, 2015, 392: 127-131.
15	桑世华, 殷辉安, 倪师军, 等 . 三元体系KBr-K₂B₄O₇-H₂O在298 K的相平衡研究[J]. 成都理工大学学报(自然科学版), 2006, 33(4): 414-416.
	Sang S H , Yin H A , Ni S J , et al . A study on equilibrium solubilities and properties of solutions in the ternary system K₂B₄O₇-KBr-H₂O at 298 K[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2006, 33(4): 414-416.
16	赵向阳, 桑世华, 孙明亮 . 三元体系K₂B₄O₇-KBr-H₂O在323 K的相平衡研究[J]. 盐湖研究, 2011, 19(1): 35-39.
	Zhao X Y , Sang S H , Sun M L . Phase equilibrium of the ternary system K₂B₄O₇-KBr-H₂O at 323 K[J]. Journal of Salt Lake Research, 2011, 19(1): 35-39.
17	桑世华, 李婷, 崔瑞芝 . 三元水盐体系KBr-K₂B₄O₇-H₂O 348 K相平衡研究[J]. 盐湖研究, 2013, 21(2): 29-32.
	Sang S H , Li T , Cui R Z . A study on phase equilibria in the ternary salt-water system KBr-K₂B₄O₇-H₂O at 348 K[J]. Journal of Salt Lake Research, 2013, 21(2): 29-32.
18	Cui R Z , Sang S H , Hu Y X , et al . Phase equilibria in the ternary systems KBr-K₂B₄O₇-H₂O and KCl-K₂B₄O₇-H₂O at 373 K[J]. Acta Geologica Sinica, 2013, 87(6): 1668-1673.
19	桑世华, 崔瑞芝, 胡咏霞 . 三元体系NaBr-Na₂SO₄-H₂O 和 NaBr-KBr-H₂O 373 K 相平衡[J].高校化学工程学报, 2014, 28(5): 939-943.
	Sang S H , Cui R Z , Hu Y X . Phase equilibria of two ternary systems NaBr-Na₂SO₄-H₂O and NaBr-KBr-H₂O at 373 K[J]. Journal of Chemical Engineering of Chinese Universities, 2014, 28(5): 939-943.
20	Cui R Z , Sang S H , Li D W , et al . Measurements and calculations of solid-liquid equilibria in the quaternary system NaBr-KBr-CaBr₂-H₂O at 298 K[J]. Computer Coupling of Phase Diagrams and Thermochemistry, 2015, 49: 120-126.
21	Cui R Z , Wei C , Wang W , et al . Phase diagram of quaternary system NaBr-KBr-CaBr₂-H₂O at 323 K[J]. Russian Journal of Physical Chemistry A, 2018, 92: 475-481.
22	Cui R Z , Wang Z C , Xu J S , et al . Measurements and calculations of solid-liquid equilibria in the quaternary system KBr-CaBr₂-MgBr₂-H₂O at (298 and 323) K[J]. Fluid Phase Equilibria, 2017, 450: 140-148.
23	Liu Q , Gao Y Y , Sang S H , et al . Solid-liquid equilibria in the quaternary systems NaBr-SrBr₂-MgBr₂-H₂O and KBr-SrBr₂-MgBr₂-H₂O at 323 K[J]. Journal of Chemical & Engineering Data, 2017, 62: 1264-1268.
24	Cui R Z , Nie G L , Sang S H , et al . Measurements of (solid + liquid) phase equilibria in the quaternary system NaBr + KBr + SrBr₂ + H₂O and two subsystems NaBr + SrBr₂ +H₂O and KBr + SrBr₂ + H₂O at T = 323 K[J]. Journal of Chemical & Engineering Data, 2017, 62: 3187-3192.
25	王丹, 桑世华, 曾晓晓, 等 . KCl-KBr-K₂SO₄-H₂O四组分物系323 K相平衡[J]. 石油化工, 2011, 40(3): 285-288.
	Wang D , Sang S H , Zeng X X , et al . Phase equilibrium of KCl-KBr-K₂SO₄-H₂O quaternary system at 323 K[J]. Petrochemical Technology, 2011, 40(3): 285-288.
26	Zhang K J , Sang S H , Li T , et al . Liquid-solid equilibria in the quaternary system KCl-KBr-K₂SO₄-H₂O at 348 K[J]. Journal of Chemical & Engineering Data, 2013, 58: 115-117.
27	Cui R Z , Sang S H , Hu Y X . Solid-liquid equilibria in the quaternary systems KCl-KBr-K₂B₄O₇-H₂O and KCl-KBr-K₂SO₄-H₂O at 373 K[J]. Journal of Chemical & Engineering Data, 2013, 58: 477-481.
28	Sang S H , Cui R Z , Hu J W , et al . Measurements of the solid-liquid equilibria in the quaternary system NaCl-NaBr-Na₂SO₄-H₂O at 323 K [J]. Journal of Solution Chemistry, 2013, 42: 1633-1640.
29	Hu Y X , Sang S H , Cui R Z , et al . Solid-liquid equilibria in the quaternary system KCl-KBr-K₂B₄O₇-H₂O at 323 K[J]. Journal of Chemical & Engineering Data, 2014, 59: 1886-1891.
30	Sang S H , Zhang H , Zhong S Y , et al . Experimental study of the solubilities of salts in the systems Na₂B₄O₇-NaBr-H₂O and Na₂B₄O₇-Na₂SO₄-NaBr-H₂O at 323 K[J]. Fluid Phase Equilibria, 2014, 361: 171-174.
31	崔瑞芝, 桑世华, 李婷, 等 . 五元体系KCl-KBr-K₂SO₄-K₂B₄O₇-H₂O 323 K和348 K的相平衡[J].化工学报, 2013, 64(3): 827-833.
	Cui R Z , Sang S H , Li T , et al . Phase equilibria in quinary system KCl-KBr-K₂SO₄-K₂B₄O₇-H₂O at 323 K and 348 K[J]. CIESC Journal, 2013, 64(3): 827-833.
32	林耀庭, 姚有成, 康正华, 等 . 四川宣达盐盆富钾富矿卤水地球化学特征及资源意义研究[J]. 盐湖研究, 2004, 12(1): 8-18.
	Lin Y T , Yao Y C , Kang Z H , et al . Study on the geochemical characteristics and resource significance of the highly mineralized potassium rich brine in the Sichuan Xuanda salt basin[J]. Journal of Salt Lake Research, 2004, 12(1): 8-18.

Related Articles 15

[1]	Chao HU, Yuming DONG, Wei ZHANG, Hongling ZHANG, Peng ZHOU, Hongbin XU. Preparation of high-concentration positive electrolyte of vanadium redox flow battery by activating vanadium pentoxide with highly concentrated sulfuric acid [J]. CIESC Journal, 2023, 74(S1): 338-345.
[2]	Bingchun SHENG, Jianguo YU, Sen LIN. Study on lithium resource separation from underground brine with high concentration of sodium by aluminum-based lithium adsorbent [J]. CIESC Journal, 2023, 74(8): 3375-3385.
[3]	Xudong YU, Qi LI, Niancu CHEN, Li DU, Siying REN, Ying ZENG. Phase equilibria and calculation of aqueous ternary system KCl + CaCl₂ + H₂O at 298.2, 323.2, and 348.2 K [J]. CIESC Journal, 2023, 74(8): 3256-3265.
[4]	Ke CHEN, Li DU, Ying ZENG, Siying REN, Xudong YU. Phase equilibria and calculation of quaternary system LiCl+MgCl₂+CaCl₂+H₂O at 323.2 K [J]. CIESC Journal, 2023, 74(5): 1896-1903.
[5]	Jingbo GAO, Qiang SUN, Qing LI, Yiwei WANG, Xuqiang GUO. Hydrate equilibrium model of hydrogen-containing gas considering hydrates structure transformation [J]. CIESC Journal, 2023, 74(2): 666-673.
[6]	Wenting CHENG, Jie LI, Li XU, Fangqin CHENG, Guoji LIU. Experiment and prediction for the solubility of AlCl₃·6H₂O in FeCl₃, CaCl₂, KCl and KCl-FeCl₃solutions [J]. CIESC Journal, 2023, 74(2): 642-652.
[7]	Jin CAI, Xiaohui WANG, Han TANG, Guangjin CHEN, Changyu SUN. Prediction of the phase equilibrium of semi-clathrate hydrate in TBAB aqueous solution [J]. CIESC Journal, 2023, 74(1): 408-415.
[8]	Huan ZHOU, Mengli ZHANG, Qing HAO, Si WU, Jie LI, Cunbing XU. Process mechanism and dynamic behaviors of magnesium sulfate type carnallite converting into kainite [J]. CIESC Journal, 2022, 73(9): 3841-3850.
[9]	Qian LIU, Xianglan ZHANG, Zhiping LI, Yulong LI, Mengxing HAN. Screening of deep eutectic solvents and study on extraction performance for oil-hydroxybenzene separation [J]. CIESC Journal, 2022, 73(9): 3915-3928.
[10]	Yuxin REN, Runfeng XU, Wanying WANG, Pengzhong CHEN, Xiaojun PENG. Synthesis and stability study of anthraquinone dyes for color photoresist [J]. CIESC Journal, 2022, 73(5): 2251-2261.
[11]	Tengfei GAO, Guoxuan LI, Zhigang LEI. Solvents selection for separation of biphenyl from FCC diesel: experimental and computational thermodynamics [J]. CIESC Journal, 2022, 73(12): 5314-5323.
[12]	Qian LIU, Xianglan ZHANG, Zhiping LI, Zhuoqi LI, Hong YU. Multiscale screening of ionic liquids as extractive solvents for oil-hydroxybenzene separation [J]. CIESC Journal, 2022, 73(11): 5011-5024.
[13]	Changwei PENG, Shihua SANG, Ruizhi CUI, Hongbao REN. Studies on three-dimensional phase diagram of the quinary system NaBr-KBr-MgBr₂-CaBr₂-H₂O at 298.15 K [J]. CIESC Journal, 2022, 73(11): 4850-4858.
[14]	Siying REN, Xudong YU, Jun LUO, Xia FENG, Zhixing ZHAO, Zhihao YAO. Phase equilibria of aqueous quaternary system Li⁺, K⁺, $N H 4 +$ // Cl^- - H₂O at 298.2 K [J]. CIESC Journal, 2022, 73(10): 4335-4344.
[15]	HOU Zhaoning, WANG Lin, YAN Xiaona, LI Xiuzhen, WANG Zhanwei, LIANG Kunfeng. Numerical simulation of bubble dynamics under multi-ultrasonic vibrators [J]. CIESC Journal, 2021, 72(S1): 362-370.

No.	Composition of liquid phase w(B)×100				J?necke index of dry salt/(g/(100 g salt))				Equilibrium solids
	Composition of liquid phase w(B)×100				J(NaBr) +J(MgBr₂)+J(CaBr₂) = 100
	w(NaBr)	w(KBr)	w(MgBr₂)	w(CaBr₂)	J(NaBr)	J(MgBr₂)	J(H₂O)	J(KBr)
1, G1	0.00	0.61	4.66	56.05	0.00	7.68	63.71	1.00	CB6 + KMB6 + KB
2	0.43	1.04	4.64	55.69	0.71	7.64	62.87	1.71	CB6 + KMB6 + KB
3, X1	0.73	1.48	4.62	55.21	1.21	7.63	62.68	2.44	CB6+KMB6+NB+KB
4, E1	0.74	1.50	0.00	57.76	1.26	0.00	68.38	2.56	CB6 + NB + KB
5	0.74	1.50	1.21	56.98	1.26	2.05	67.15	2.55	CB6 + NB + KB
6	0.74	1.50	2.56	56.01	1.25	4.32	66.08	2.53	CB6 + NB + KB
7	0.74	1.49	3.66	55.89	1.23	6.07	63.39	2.47	CB6 + NB + KB
8, N1	8.06	3.81	36.13	0.00	18.24	81.76	117.67	8.62	KMB6 + NB2 + KB
9	7.40	3.64	32.35	2.90	17.35	75.85	125.93	8.53	KMB6 + NB2 + KB
10	6.98	3.50	30.30	4.83	16.58	71.95	129.16	8.31	KMB6 + NB2 + KB
11, Y1	6.66	3.31	28.10	6.97	15.96	67.34	131.70	7.93	KMB6+NB2+NB+KB
12	5.92	3.01	25.82	11.24	13.77	60.07	125.66	7.00	KMB + NB + KB
13	5.29	2.74	22.67	17.72	11.58	49.63	112.92	6.00	KMB6 + NB + KB
14	4.61	2.33	19.30	23.47	9.73	40.73	106.14	4.92	KMB6 + NB + KB
15	3.65	2.01	15.27	30.90	7.33	30.65	96.69	4.03	KMB6 + NB + KB
16	1.98	1.79	9.45	41.02	3.78	18.02	87.24	3.41	KMB6 + NB + KB
17	1.33	1.57	6.31	49.32	2.33	11.08	72.81	2.76	KMB6 + NB + KB
18, F1	10.45	3.05	0.00	40.61	20.47	0.00	89.87	5.97	NB + NB2 + KB
19	10.02	3.07	1.99	37.31	20.32	4.03	96.53	6.22	NB + NB2 + KB
20	9.86	3.10	4.02	34.20	20.51	8.36	101.54	6.45	NB + NB2 + KB
21	9.30	3.13	6.72	29.90	20.25	14.63	110.95	6.82	NB + NB2 + KB
22	8.85	3.16	8.87	26.32	20.10	20.14	119.89	7.18	NB + NB2 + KB
23	8.46	3.18	12.70	21.79	19.70	29.57	125.42	7.40	NB + NB2 + KB
24	7.99	3.21	15.77	18.97	18.70	36.91	126.52	7.51	NB + NB2 + KB
25	7.47	3.25	19.76	14.86	17.75	46.95	129.86	7.72	NB + NB2 + KB
26	7.01	3.29	24.33	10.60	16.71	58.01	130.59	7.84	NB + NB2 + KB

No.	Composition of liquid phase w(B)×100				J?necke index of dry salt/(g/(100 g salt))				Equilibrium solids
	Composition of liquid phase w(B)×100				J(NaBr) +J(MgBr₂)+J(CaBr₂) = 100
	w(NaBr)	w(KBr)	w(MgBr₂)	w(CaBr₂)	J(NaBr)	J(MgBr₂)	J(H₂O)	J(KBr)
1, G1	0.00	0.61	4.66	56.05	0.00	7.68	63.71	1.00	CB6 + KMB6 + KB
2	0.43	1.04	4.64	55.69	0.71	7.64	62.87	1.71	CB6 + KMB6 + KB
3, X1	0.73	1.48	4.62	55.21	1.21	7.63	62.68	2.44	CB6+KMB6+NB+KB
4, E1	0.74	1.50	0.00	57.76	1.26	0.00	68.38	2.56	CB6 + NB + KB
5	0.74	1.50	1.21	56.98	1.26	2.05	67.15	2.55	CB6 + NB + KB
6	0.74	1.50	2.56	56.01	1.25	4.32	66.08	2.53	CB6 + NB + KB
7	0.74	1.49	3.66	55.89	1.23	6.07	63.39	2.47	CB6 + NB + KB
8, N1	8.06	3.81	36.13	0.00	18.24	81.76	117.67	8.62	KMB6 + NB2 + KB
9	7.40	3.64	32.35	2.90	17.35	75.85	125.93	8.53	KMB6 + NB2 + KB
10	6.98	3.50	30.30	4.83	16.58	71.95	129.16	8.31	KMB6 + NB2 + KB
11, Y1	6.66	3.31	28.10	6.97	15.96	67.34	131.70	7.93	KMB6+NB2+NB+KB
12	5.92	3.01	25.82	11.24	13.77	60.07	125.66	7.00	KMB + NB + KB
13	5.29	2.74	22.67	17.72	11.58	49.63	112.92	6.00	KMB6 + NB + KB
14	4.61	2.33	19.30	23.47	9.73	40.73	106.14	4.92	KMB6 + NB + KB
15	3.65	2.01	15.27	30.90	7.33	30.65	96.69	4.03	KMB6 + NB + KB
16	1.98	1.79	9.45	41.02	3.78	18.02	87.24	3.41	KMB6 + NB + KB
17	1.33	1.57	6.31	49.32	2.33	11.08	72.81	2.76	KMB6 + NB + KB
18, F1	10.45	3.05	0.00	40.61	20.47	0.00	89.87	5.97	NB + NB2 + KB
19	10.02	3.07	1.99	37.31	20.32	4.03	96.53	6.22	NB + NB2 + KB
20	9.86	3.10	4.02	34.20	20.51	8.36	101.54	6.45	NB + NB2 + KB
21	9.30	3.13	6.72	29.90	20.25	14.63	110.95	6.82	NB + NB2 + KB
22	8.85	3.16	8.87	26.32	20.10	20.14	119.89	7.18	NB + NB2 + KB
23	8.46	3.18	12.70	21.79	19.70	29.57	125.42	7.40	NB + NB2 + KB
24	7.99	3.21	15.77	18.97	18.70	36.91	126.52	7.51	NB + NB2 + KB
25	7.47	3.25	19.76	14.86	17.75	46.95	129.86	7.72	NB + NB2 + KB
26	7.01	3.29	24.33	10.60	16.71	58.01	130.59	7.84	NB + NB2 + KB

No.	Composition of liquid phase w(B)×100				J?necke index of dry salt/(g/(100 g salt))				Equilibrium solids
	Composition of liquid phase w(B)×100				J(NaBr)+J(MgBr₂)+J(CaBr₂) = 100
	w(NaBr)	w(KBr)	w(MgBr₂)	w(CaBr₂)	J(NaBr)	J(MgBr₂)	J(H₂O)	J(KBr)
1, E2	0.00	0.49	7.16	61.85	0.00	10.38	44.20	0.71	MCB12 + KMB6 + KB
2	1.31	0.88	6.84	57.20	2.00	10.47	51.68	1.35	MCB12 + KMB6 + KB
3, Z2	2.18	1.09	6.49	53.32	3.52	10.47	59.56	1.76	MCB13+KMB6+NB+KB
4,G2	0.72	0.67	0.00	70.22	1.01	0.00	40.02	0.94	CB4 + NB + KB
5	0.70	0.61	1.21	66.98	1.02	1.76	44.27	0.89	CB4 + NB + KB
6, X2	0.65	0.54	3.22	63.51	0.96	4.78	47.61	0.80	CB4+NB+MCB12+ KB
7, N2	12.81	4.54	30.15	0.00	29.82	70.18	122.21	10.57	MB6 + NB2 + KB
8	12.11	4.32	28.15	2.90	28.06	65.22	121.69	10.01	MB6 + NB2 + KB
9	10.98	3.98	25.30	6.83	25.47	58.69	122.73	9.23	MB6 + NB2 + KB
10	10.22	3.64	23.10	9.97	23.61	53.36	122.59	8.41	MB6 + NB2 + KB
11, Y2	9.27	3.41	20.57	13.44	21.42	47.53	123.17	7.88	NB+NB2+KMB6+KB
12	7.99	3.21	16.77	18.87	18.31	38.44	121.84	7.36	MB6 + KMB6 + KB
13	6.32	2.78	13.63	24.86	14.10	30.42	116.96	6.20	MB6 + KMB6 + KB
14	5.01	2.11	11.11	31.75	10.47	23.21	104.49	4.41	MB6 + KMB6 + KB
15	3.76	1.58	9.45	41.02	6.93	17.43	81.49	2.91	MB6 + KMB6 + KB
16, D2	45.93	8.15	0.00	2.48	94.88	0.00	89.73	16.84	NB + NB2 +KB
17	42.31	7.73	1.29	3.79	89.28	2.72	94.70	16.31	NB + NB2 +KB
18	39.77	7.21	2.87	4.56	84.26	6.08	96.59	15.28	NB + NB2 +KB
19	36.45	6.89	4.80	5.32	78.26	10.31	99.92	14.79	NB + NB2 +KB
20	32.21	6.41	6.21	6.78	71.26	13.74	107.06	14.18	NB + NB2 +KB
21	26.77	5.91	10.29	7.73	59.77	22.97	110.07	13.19	NB + NB2 +KB
22	23.34	5.04	12.39	8.69	52.54	27.89	113.78	11.35	NB + NB2 +KB
23	17.51	4.38	15.82	10.33	40.11	36.23	119.01	10.03	NB + NB2 +KB
24	14.67	3.97	17.82	11.09	33.66	40.89	120.35	9.11	NB + NB2 +KB
25, F2	0.00	0.52	3.26	63.39	0.00	4.89	49.26	0.78	MCB12 + CB4 + KB
26	0.33	0.52	3.25	63.44	0.49	4.85	48.43	0.78	MCB12 + CB4 + KB

No.	Composition of liquid phase w(B)×100				J?necke index of dry salt/(g/(100 g salt))				Equilibrium solids
	Composition of liquid phase w(B)×100				J(NaBr)+J(MgBr₂)+J(CaBr₂) = 100
	w(NaBr)	w(KBr)	w(MgBr₂)	w(CaBr₂)	J(NaBr)	J(MgBr₂)	J(H₂O)	J(KBr)
1, E2	0.00	0.49	7.16	61.85	0.00	10.38	44.20	0.71	MCB12 + KMB6 + KB
2	1.31	0.88	6.84	57.20	2.00	10.47	51.68	1.35	MCB12 + KMB6 + KB
3, Z2	2.18	1.09	6.49	53.32	3.52	10.47	59.56	1.76	MCB13+KMB6+NB+KB
4,G2	0.72	0.67	0.00	70.22	1.01	0.00	40.02	0.94	CB4 + NB + KB
5	0.70	0.61	1.21	66.98	1.02	1.76	44.27	0.89	CB4 + NB + KB
6, X2	0.65	0.54	3.22	63.51	0.96	4.78	47.61	0.80	CB4+NB+MCB12+ KB
7, N2	12.81	4.54	30.15	0.00	29.82	70.18	122.21	10.57	MB6 + NB2 + KB
8	12.11	4.32	28.15	2.90	28.06	65.22	121.69	10.01	MB6 + NB2 + KB
9	10.98	3.98	25.30	6.83	25.47	58.69	122.73	9.23	MB6 + NB2 + KB
10	10.22	3.64	23.10	9.97	23.61	53.36	122.59	8.41	MB6 + NB2 + KB
11, Y2	9.27	3.41	20.57	13.44	21.42	47.53	123.17	7.88	NB+NB2+KMB6+KB
12	7.99	3.21	16.77	18.87	18.31	38.44	121.84	7.36	MB6 + KMB6 + KB
13	6.32	2.78	13.63	24.86	14.10	30.42	116.96	6.20	MB6 + KMB6 + KB
14	5.01	2.11	11.11	31.75	10.47	23.21	104.49	4.41	MB6 + KMB6 + KB
15	3.76	1.58	9.45	41.02	6.93	17.43	81.49	2.91	MB6 + KMB6 + KB
16, D2	45.93	8.15	0.00	2.48	94.88	0.00	89.73	16.84	NB + NB2 +KB
17	42.31	7.73	1.29	3.79	89.28	2.72	94.70	16.31	NB + NB2 +KB
18	39.77	7.21	2.87	4.56	84.26	6.08	96.59	15.28	NB + NB2 +KB
19	36.45	6.89	4.80	5.32	78.26	10.31	99.92	14.79	NB + NB2 +KB
20	32.21	6.41	6.21	6.78	71.26	13.74	107.06	14.18	NB + NB2 +KB
21	26.77	5.91	10.29	7.73	59.77	22.97	110.07	13.19	NB + NB2 +KB
22	23.34	5.04	12.39	8.69	52.54	27.89	113.78	11.35	NB + NB2 +KB
23	17.51	4.38	15.82	10.33	40.11	36.23	119.01	10.03	NB + NB2 +KB
24	14.67	3.97	17.82	11.09	33.66	40.89	120.35	9.11	NB + NB2 +KB
25, F2	0.00	0.52	3.26	63.39	0.00	4.89	49.26	0.78	MCB12 + CB4 + KB
26	0.33	0.52	3.25	63.44	0.49	4.85	48.43	0.78	MCB12 + CB4 + KB

Phase equilibria in quinary system NaBr-KBr-MgBr₂-CaBr₂-H₂O at 298 K and 323 K

298 K和323 K条件下五元体系NaBr-KBr-MgBr₂-CaBr₂-H₂O相平衡研究

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 8

References 32

Related Articles 15

Recommended Articles

Metrics

Comments