副产硫酸亚铁制备电池级草酸亚铁的研究  

Research on preparation of battery-grade ferrous oxalate from by-product ferrous sulfate

作　　者：彭爱国[1] 贺周初[1] 余长艳[1] 肖伟[1] 庄新娟[1] 刘艳[1] 

机构地区：[1]湖南化工研究院,湖南长沙410007

出　　处：《无机盐工业》2012年第8期60-62,共3页Inorganic Chemicals Industry

摘　　要：以钛白副产硫酸亚铁为原料制备出电池级草酸亚铁。研究了除杂、沉淀、转化反应过程中反应温度、反应时间、硫酸亚铁浓度以及反应pH等因素对产品质量的影响,并得到了优惠工艺条件。结果表明:在反应温度为95℃、反应时间为6 h的条件下用铁粉对硫酸亚铁溶液除杂,得到纯净硫酸亚铁溶液;在反应温度为40℃、铁(Ⅱ)质量浓度为90 g/L的条件下用氨水沉淀,再用草酸于反应时间为60 min、pH=2.0条件下将氢氧化亚铁转化成草酸亚铁,制备出了纯度大于99.5%、粒径小于3.0μm、杂质含量低的电池级草酸亚铁。为解决钛白副产硫酸亚铁的综合利用提供了一条有效的途径。Battery-grade ferrous oxalate was prepared with the by-product ferrous sulfate from titanium white production as raw material.Influences of reaction temperature, reaction time, concentration of ferrous sulfate, and pH etc. in the processes of impurity removal,precipitation, and conversion reaction on the product quality were discussed ,and the optimum process conditions were obtained.Results showed that battery-grade ferrous oxalate with particle size less than 3.0 μm ,purity more than 99.5%, and with low impurity content could be prepared under the conditions as follows：pure ferrous sulfate solution was obtained by using iron powder to purify it at the reaction temperature of 95 ~C for 6 h ; then use ammonia to precipitate ferrous sulfate at the reaction temperature of 40 ℃ and Fe2＋ mass concentration of 90 g/L;at last,use oxalate to converse the ferrous hydroxide into ferrous oxalate at the reaction pH=2.0 and time of 60 min.Thus, an effective way was provided to utilize the by-product of titanium white.

关 键 词：草酸亚铁 硫酸亚铁 电池 

分 类 号：TQ138.11[化学工程—无机化工]