摘要
对扩散渗析法回收硫酸稀土溶液中硫酸进行了实验研究,结果表明,料液中稀土浓度0～0.2mol/L范围内的较小变化对硫酸回收率没有明显影响;料液流量越大,即设备单位膜面积处理能力越大,硫酸回收率越低,回收液硫酸浓度及稀土截留率也越低,控制硫酸回收率在70%～80%较为合适;水料流量比越大,硫酸回收率越大,但回收液硫酸浓度及稀土截留率均降低,控制水料流量比在1左右较为合适;扩散渗析法能达到有效回收硫酸稀土溶液中硫酸的目的.
Sulphuric acid recovery from RE sulphate solutions by diffusion dialysis was experimentally studied in this paper. The results under investigation indicated that change of RE concentration in feed solutions within (0～)0.2 mol/L showed no evident influence on sulphuric acids recovery. Increasing flow rate of feed solutions, namely increasing disposal ability per membrane of the experimental set-up, decreased recovery ratio of sulphuric acids, sulphuric acids concentration in recovered solutions, and RE rejection ratio decreased at the same time. Recovery ratio of sulphuric acids being 70%～80% was favourable; Increasing flow rate ratio of water to feed solutions increased sulphuric acids recovery ratio, but sulphuric acids concentration in recovered solutions and rejection ratio of RE decreased. Flow rate ratio of water to feed solutions being 1 was favourable. The recovery of sulphuric acids from RE sulphate solutions could be achieved by diffusion dialysis.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2005年第2期50-53,共4页
Membrane Science and Technology
