| 复分解法合成硝酸钾工艺改进 |
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| 引用本文： | 袁桂梅,张祺,王晓琴,周倩.复分解法合成硝酸钾工艺改进[J].中国现代教育装备,2022(3):133-135. |
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| 作者姓名： | 袁桂梅 张祺 王晓琴 周倩 |
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| 作者单位： | 中国石油大学（北京）理学院 |
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| 基金项目： | 北京市高等学校教育教学改革项目“新工科背景下基于EPT-TEO理念的数理化公共基础课程群‘金课’建设”(编号:XM10720200132);中国石油大学(北京)教育教学改革项目“《无机化学和分析化学实验》创新创业类课程建设”(编号:XM10720170670)。 |
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| 摘 要： | 以KCl和NaNO3为原料,利用复分解反应原理合成KNO3.本实验根据溶解度的不同,在高温下通过热过滤除掉溶解度小的NaCl,再将滤液冷却、过滤得到KNO3晶体产品,用莫尔法测定Cl含量并计算KNO3纯度.针对此实验中溶液的浓缩程度、热过滤方式以及重结晶过程中存在的问题进行了改进.
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| 关 键 词： | 复分解法 溶液浓缩 过滤方式 重结晶 |
Improvement of Synthesis of Potassium Nitrate by Double Decomposition |
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| Yuan Guimei,Zhang Qi,Wang Xiaoqin,Zhou Qian.Improvement of Synthesis of Potassium Nitrate by Double Decomposition[J].China Modern Education Equipment,2022(3):133-135. |
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| Authors: | Yuan Guimei Zhang Qi Wang Xiaoqin Zhou Qian |
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| Institution: | (College of Science,China University of Petroleum(Beijing),Beijing,102249,China) |
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| Abstract: | KNO3crystals are synthesized by metathesis reaction with KCl and NaNO3precursors.In this experiment,NaCl could be removed by hot filtration at high temperatures due to its smaller solubility.When the filtrate cools down,the second crystal product-KNO3could be filtered and obtained,then measures chlorine content by using Mohr and calculates KNO3purityfinally.In this paper,we report a way to address the problems during the process of solution concentration,hot filtration and recrystallization.We have demonstrated improved qualities of KNO3crystals through this process. |
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| Keywords: | double decomposition method solution concentration filtration method recrystallization |
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