五硼酸钾制备方法的对比  

Comparison of Different Methods for Producing Potassium Pentaborate

作　　者：杨刚[1] 张金平[1] 李佐虎[1] 张懿[1] 

机构地区：[1]中国科学院过程工程研究所,北京100080

出　　处：《化工进展》2005年第9期1011-1014,共4页Chemical Industry and Engineering Progress

基　　金：国家"973"计划资助项目(No.2004CB719701)。

摘　　要：实验研究了5种制备五硼酸钾的方法。利用五硼酸钾在水溶液中溶解度小的特点,获得用不同物质的量配比的氢氧化钾与硼酸、碳酸钾与硼酸、四硼酸钾与硼酸在水溶液反应制取五硼酸钾的规律;利用五硼酸钠溶解度大的特点,研究不同物质的量配比的氢氧化钠与硼酸添加氯化钾制取五硼酸钾的反应过程;使用高温反应装置,初步探讨了氯化钾与硼酸在高温水蒸气气氛下的水解反应,获得较优的反应温度条件。Five methods of producing potassium pentaborate were studied. According to low solubility of potassium pentaborate in water solution, the rules of reaction in water including potassium hydroxide and boric acid, potassium carbonate and boric acid, and potassium tetraborate and boric acid, were obtained. Taking advantage of high solubility of sodium pentaborate in water solution, the process of producing potassium pentaborate by reaction among sodium hydroxide, boric acid and potassium chloride in water was studied. Hydrolysis reaction between potassium chloride and boron oxide in high temperature water vapor was preliminarily investigated. The optimal temperature of this reaction was 850℃.

关 键 词：五硼酸钾 氯化钾 转化率 硼酸盐 

分 类 号：TQ128.5[化学工程—无机化工]