| 硼酸/硼砂与多羟基化合物在水溶液中的反应:pH、电导率、Raman光谱研究 |
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| 引用本文： | 柏春,刘海宁,刘忠,叶秀深,张慧芳,李军,吴志坚.硼酸/硼砂与多羟基化合物在水溶液中的反应:pH、电导率、Raman光谱研究[J].盐湖研究,2020,28(2):56-64. |
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| 作者姓名： | 柏春 刘海宁 刘忠 叶秀深 张慧芳 李军 吴志坚 |
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| 作者单位： | 中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁 810008;青海省盐湖资源化学重点实验室,青海西宁 810008;中国科学院大学,北京 100049 |
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| 基金项目： | 青海省科技计划应用基础研究(2019-ZJ-903)；青海省科技成果转化专项(2018-GX-121)；青海省科技计划科技合作专项(2018-HZ-807)；青海省“高端创新人才千人计划”；中科院百人计划项目 |
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| 摘 要： | 与多羟基化合物络合是去除和分离溶液中微量硼的有效手段,但我们对多羟基化合物与硼酸盐的反应缺乏深入认识。本文通过测定硼酸/硼砂与木糖醇、D-果糖、D-山梨醇和D-甘露醇在水溶液中反应的pH、电导率及Raman光谱,综合对比研究了硼酸/硼砂与四种多羟基化合物的络合反应。对于多羟基化合物/硼酸水溶液,随着多羟基化合物浓度的增加,溶液的pH值降低,电导率显著增加。对于多羟基化合物/硼砂水溶液,随着多羟基化合物浓度的增加,溶液的pH值和电导率都是首先明显降低,之后缓慢降低。为使硼酸/硼砂络合完全,多羟基化合物与硼酸的物质量的比要大于2。四种多羟基化合物与硼酸反应后,都出现了新的Raman峰,D-甘露醇与硼酸在溶液中反应后,在1 207 cm~(-1)处出现了较强的Raman峰。在四种多羟基化合物中,D-甘露醇与硼酸/硼砂的反应效果更好。
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| 关 键 词： | 硼酸盐 多羟基化合物 电导率 Raman光谱 |
| 收稿时间： | 2019/4/18 0:00:00 |
| 修稿时间： | 2019/7/8 0:00:00 |
Reactions of Boric Acid/Borax with Polyhydroxyl Compounds:Solution pH, Conductivity and Raman Spectroscopy |
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| BAI Chun,LIU Hai ning,LIU Zhong,YE Xiu shen,ZHANG Hui fang,LI Jun,WU Zhi jian.Reactions of Boric Acid/Borax with Polyhydroxyl Compounds:Solution pH, Conductivity and Raman Spectroscopy[J].Journal of Salt Lake Research,2020,28(2):56-64. |
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| Authors: | BAI Chun LIU Hai ning LIU Zhong YE Xiu shen ZHANG Hui fang LI Jun WU Zhi jian |
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| Institution: | Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining |
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| Abstract: | Abstract: Complexation of borate with hydroxyl compounds is an effective method for removing and separating trace boron from aqueous solutions. However, the reactions of polyhydroxyl compounds with borates are not well understood. The complexation of boric acid/borax with xylitol, D-fructose, D-sorbitol, and D-mannitol were studied comparatively and comprehensively, by checking solution pH, conductivity, and Raman spectroscopy. For polyhydroxy compound/boric acid aqueous solutions, the pH value of the solutions decreases with the increase of polyhydroxy compound concentration, with the conductivity increasing significantly. For polyhydroxy compound/borax aqueous solutions, the pH value and conductivity of the solutions both decrease significantly at first and then slowly as the concentration of the polyhydroxy compound increases. To complete the complexation between boric acid/borax and the polyhydroxyl compounds, the molar ratio of the polyhydroxyl compound to boron should be greater than 2. After the reaction of all the four polyhydroxyl compounds with boric acid, new Raman peaks appear, with D-mannitol/boric acid solution having a strong Raman peak at 1207 cm-1. Of the four polyhydroxyl compounds, D-mannitol reacts better with boric acid/borax. |
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| Keywords: | Boron Hydroxyl compound Conductivity Raman spectra |
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