摘要
在盐酸介质中以磷酸三丁酯(TBP)为萃取剂、磺化煤油为稀释剂,从钛铁矿与氢氧化钾亚熔盐反应产物的酸解液中萃取分离Fe3+,并利用萃取后的含钛液水解制备二氧化钛.考察了萃取剂浓度、盐酸浓度、有机相和水相体积比(O/A)和萃取时间对铁萃取率的影响.结果表明,钾系亚熔盐法分解钛铁矿的分解率在96%以上.萃取率随着TBP浓度及盐酸浓度的增加和O/A值的减小而增大;通过调节萃取条件,萃取率可以达到99%以上.用1.0mol/L的NaCl溶液进行反萃,反萃率可达98%以上.萃取后含钛液经水解可以制得纯度高于98%的金红石型TiO2球状颗粒.
Extraction separation of ferric ions by solvent extraction method using tributyl phosphate （TBP） as extraction agent and sulfonic kerosene as thinner from the dissolved products of KOH and ilmenite in hydrochloric acid solution was studied. And TiO2 was prepared by hydrolyzing the raffinate. The effects of TBP concentration, hydrochloric acid concentration, concentration ratio of organic phase to aqueous phase （O/A） and extracting time on the extraction of ferric ions were investigated. The results showed that the extraction process was fast and the extraction rate of ferric ions increased with increasing the concentration of TBP and HC1 concentration and decreasing the O/A ratio. The maximum extraction rate was larger than 99%. The reverse extraction rate using 1.0 mol/LNaC1 solution reached 98%. The hydrolyzing product was rutile TiO2 spheres with the purity of more than 98%.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2008年第3期504-510,共7页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:50574084)
国家“十一五”科技支撑计划重大基金资助项目(编号:2006BAC02A05)
国家重点基础研究发展规划(973)基金资助项目(编号:2007CB613501)
关键词
钛铁矿
亚熔盐法
磷酸三丁酯
萃取
二氧化钛
ilmenite
sub-molten salt method
tributyl phosphate
extraction
titanium dioxide
