氟硼酸钾制备工艺研究

Study on the Production Process of Potassium Fluoride

本文以硼砂、40%的氢氟酸、固态氯化钾为原料,通过沉淀结晶法制备氟硼酸钾(KBF 4)。本论文通过改变反应温度、原料浓度及滴加方式,将不同条件下制备的氟硼酸钾的产率及粒径进行了测试计算。结果表明:低温、高浓度有利于提高产物的产率,高温有利于粒径增长,而高浓度不利于粒径增长,采用对滴的方式既能提高产率又有利于粒径增长。

This thesis aims to introduce potassium fluoborate,which is be made form borax and 40%of hydrofluoric acid by the method of precipitation and crystallization.By changing the reaction temperature and raw material concentration as well as the way of dripping,I get the different results of productivity and particle size in making potassium fluoborate.As a result,temperature and high concentration are good for improving productivity.Besides,high temperature help to increase particle size.By contrast,high concentration goes against the expansion of particle size.So it is advisable for us to adopt the dropping way to improve productivity and expand particle size.