| 五硼酸钾溶液中含硼物种分布研究 |
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| 引用本文： | 贾力凡,朱发岩,周永全,刘红艳,王云霞,王广国,景转芳,宋露露. 五硼酸钾溶液中含硼物种分布研究[J]. 盐湖研究, 2022, 30(4) |
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| 作者姓名： | 贾力凡 朱发岩 周永全 刘红艳 王云霞 王广国 景转芳 宋露露 |
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| 作者单位： | 中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所 |
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| 基金项目： | 国家自然科学基金项目(U1607106) |
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| 摘 要： | 采用物种分布图和核磁共振实验研究了五硼酸钾溶液中含硼物种的类型、含量和溶液浓度间关系。研究表明五硼酸钾在稀溶液中几乎全部水解为B(OH)3和B(OH)4-；在较浓溶液中主要物种为B3O3(OH)4-和B(OH)3，而B5O6(OH)4-和[B4O5(OH)42-]的含量较小。核磁共振实验研究给出了B(OH)4-, B3O3(OH)4-和B5O6(OH)4-的生成常数K1, K3, K5，研究得出B5O6(OH)4-含量很少的原因是其解聚为其它类型硼酸根离子。外加离子促进五硼酸根离子的生成，而高温条件促进B5O6(OH)4-发生解聚反应。
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| 关 键 词： | 物种分布图 核磁共振 五硼酸钾 硼酸根离子 |
| 收稿时间： | 2022-04-18 |
| 修稿时间： | 2022-05-05 |
Boron-11 Nuclear Magnetic Resonance Study of Aqueous Potassium Pentaborate Solution |
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| jialifan,zhufayan,zhouyongquan,liuhongyan,wangyunxi,wangguangguo,jingzhuanfang and songlulu. Boron-11 Nuclear Magnetic Resonance Study of Aqueous Potassium Pentaborate Solution[J]. Journal of Salt Lake Research, 2022, 30(4) |
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| Authors: | jialifan zhufayan zhouyongquan liuhongyan wangyunxi wangguangguo jingzhuanfang songlulu |
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| Affiliation: | Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences |
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| Abstract: | The relationship between the type, content and solution concentration of boron-containing species in potassium pentaborate solution was studied using species distribution diagrams and NMR experiments. Studies have shown that potassium pentaborate is almost completely hydrolyzed into B(OH)3 and B(OH)4- in dilute solution. The main species in the concentrated solution are B3O3(OH)4- and B(OH)3, while the content of B5O6(OH)4- and [B4O5(OH)42-] is less. The formation constants K1, K3 and K5 of B(OH)4-, B3O3(OH)4- and B5O6(OH)4- were given by NMR experimental study. The reason for the low content of B5O6(OH)4- is that it depolymerizes into other borate ions. The addition of ions promoted the formation of pentaborate, while high temperature promoted the depolymerization of B5O6(OH)4-. |
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| Keywords: | Formation constant NMR Potassium pentaborate Borate anions |
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