摘要
基于溶剂萃取法在卤水提硼应用中具有广阔的前景,以四川盆地平落地下卤水为原料,2,2,4-三甲基-1,3-戊二醇为萃取剂,CHCl3为稀释剂从卤水中萃取提硼。考察了萃取剂浓度、相比、萃取时间、卤水pH、萃取级数、饱和萃取容量、反萃剂浓度、反萃相比以及反萃级数等条件实验,获得了2,2,4-三甲基-1,3-戊二醇从平落地下卤水中提硼的最优化条件:当萃取剂浓度为0.8mol/L,相比为1∶1,卤水pH=1～6,萃取时间为8min时,饱和萃取容量为46.25g/L(以H3BO3计),在该条件下经一级萃取,二级反萃,硼的回收率达90.62%。
Solvent extraction is a promising technique for recovery of boron from brine. Experi- ment of extracting boron was conducted by taking the brines from Pingluo of Sichuan Basin as raw material, and using 2,2,4-trimethyl-1,3-pentanediol dissolved in chloroform as extractant. The concentration of extractant,the time of extraction, the ratio of organic phase to brine, the a- cidity of brine,the stages of extraction,the extraction capacity, the concentration of stripping a- gent,and the ratio of organic phase containing boric acid to stripping phase and stripping stages were investigated. The optimal experimental parameters were obtained and listed as follows：con- centration of extractant was 0.8 mol/L, the ratio of organic phase to brine was 1： 1, the pH value of brine ranging from 1 to 6, the extraction time was 8 minutes, the extraction capacity （extractant to boric acid） was 46.25 g/L. Under the optimal conditions,the recovery ratio of boric acid rea- ches 90. 62% by one-stage extraction and two-stage stripping.
出处
《矿物岩石》
CAS
CSCD
北大核心
2013年第3期26-29,共4页
Mineralogy and Petrology
基金
国家863计划课题2012AA061704
相平衡与盐卤化工四川省青年科技创新研究团队:2013TD0005
