Metastable Zone Properties of H3BO3 in Different Concentrations of KCl and NH4Cl Solutions

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (11): 2635.

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Metastable Zone Properties of H3BO3 in Different Concentrations of KCl and NH4Cl Solutions

KONG Fan-Zhi^1,2, DONG Ya-Ping^1*, MENG Qing-Fen¹, PENG Jiao-Yu^1,2, LI Wu¹

1. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;
2. Graduate School of Chinese Academy of Sciences, Beijng 100049, China

Received:2010-12-20 Revised:2011-07-11 Online:2011-11-10 Published:2011-10-14
Contact: DONG Ya-Ping E-mail:dyp811@126.com
Supported by:
国家“十一五”科技支撑计划(批准号: 2006BAB09B07)和中国科学院科技支持青海项目(批准号: 0810021007)资助.

Abstract

Abstract: The solubility and ultra solubility of boric acid in aqueous were measured in the presence of different concentrations of KCl and NH4Cl from 0 ℃ to 25 ℃. The metastable zones and the crystal nucleation orders of H3BO3 were calculated. Effects and action mechanism of KCl and NH4Cl on metastable zone property of H3BO3 were studied. The result shows that the existence of KCl makes the metastable zone of H3BO3 move to higher temperature by increasing solubility of H3BO3. According to the adsorption effect, NH4Cl makes metastable zone of H3BO3 move to lower temperature. Concentration variation of KCl and NH4Cl in evaporation of Nayishan oilfield brine is one of the reasons that boron crystallizes dispersedly.

Key words: H3BO3, KCl, NH4Cl, Metastable zone, Solubility, Ultra solubility

CLC Number:

O645.5

TrendMD:

KONG Fan-Zhi, DONG Ya-Ping*, MENG Qing-Fen, PENG Jiao-Yu, LI Wu. Metastable Zone Properties of H3BO3 in Different Concentrations of KCl and NH4Cl Solutions[J]. Chem. J. Chinese Universities, 2011, 32(11): 2635.

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Metastable Zone Properties of H3BO3 in Different Concentrations of KCl and NH4Cl Solutions

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