含氟混合酸制取氟化钙的研究  

Preparation of calcium fluoride by fluorine-containing mixed acid

作　　者：张欣露[1] 孙新华[2] 于宝青[1] 

机构地区：[1]天津金牛电源材料有限责任公司,天津300400 [2]中海油天津化工研究设计院

出　　处：《无机盐工业》2011年第6期59-61,共3页Inorganic Chemicals Industry

摘　　要：六氟磷酸锂生产企业副产大量混合酸,其主要成分是氟化氢和氯化氢。介绍了利用六氟磷酸锂生产企业副产的含氟混合酸和氯化钙为原料制备氟化钙并副产盐酸的生产工艺,并对工艺条件进行了研究。较佳工艺条件:反应温度为60℃,氯化钙溶液质量分数为50%,氯化钙溶液与含氟混合酸采用双向加入法(取含氟混合酸应加量的20%作为底液,将氯化钙水溶液和剩余含氟混合酸以一定的滴加速度同时加入反应器中)。对较佳工艺条件进行了验证实验,所得氟化钙产品质量达到企业一级品标准的要求,副产的盐酸质量分数达到25%以上。工艺流程简单,生产易于控制。Lithium hexafluorophosphate manufacturing enterprises produce large amount of mixed acid,which mainly contians fluorine hydride and chlorine hydride. A technology for preparation of calcium fluoride and by-product hydrochloric acid with fluorine-ontaining mixed acid by-produced from lithium hexafluorophosphate manufacturing enterprises and calci- um chloride as raw materials was introduced. Optimum process conditions were investigated and confirmed as follows：reac- tion temperature of 60 ℃, mass fraction of calcium chloride solution of 50%, adding calcium chloride solution and mixed acid by two-way method （ i. e. take 20% of mixed acid to be added into the reactor as the bottom liquid, add the calcium chloride solution and remained mixed acid into the reactor at the same time with a certain speed）. Optimum process condi- tions were also verified by tests. Quality of calcium fluoride product met the first grade requirement of enterprise standard and the by-produced hydrochloric acid＇s mass fraction reached more than 25%. This process is simple and production is easy to control.

关 键 词：含氟混和酸 氟化钙 盐酸 氟化氢 

分 类 号：TQ124.3[化学工程—无机化工]