Sulfuric acid recovery from rare earth sulphate solutions by diffusion dialysis

• Published in: Transactions of Nonferrous Metals Society of China Vol. 16; no. 4; pp. 951 - 955
• Main Author: 唐建军 周康根 张启修
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2006; School of Construction and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China%School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China
• Subjects: diffusion dialysis; mathematical model; rare earth; recovery; sulfuric acid; 数学模型; 硫磺酸; 腹膜透析; mathematical model; rare earth; recovery; diffusion dialysis; sulfuric acid
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(06)60358-0

Sulfuric acid recovery from rare earth sulphate solutions by diffusion dialysis was studied. The mass transfer model of diffusion dialysis was established, the comparison between the experimental results and mathematical results was carried out, and the numerical analysis on the effects of operational parameters was studied. The results indicate that the derived mathematical model shows good quantitative relation between sulphuric acid recovery ratio and operational parameters, and the mathematical results agree with the experimental results well. The numerical analysis results indicate that it is appropriate to keep the ratio of water and feed flow rates, processing capacity per membrane area and recovery ratio of sulphuric acid to be 1, 20 L/（m^2.d） and 0.7-0.8, respectively.