Recovery of H2SO4 from an acid leach solution by diffusion dialysis.
Diffusion dialysis with a series of anion exchange membranes was used to recover H(2)SO(4) from an acid leach solution produced during the vanadium manufacturing process. The effects of sulfuric acid, FeSO(4) and VOSO(4) concentration, flow rate and flow rate ratio on the recovery of H(2)SO(4) were investigated. The results showed that sulfuric acid permeated well through the membranes used, while metal ions were efficiently rejected. The recovery of H(2)SO(4) increased as the sulfate concentration of the feed increased and the flow rate ratio of water to feed increased. More than 80% of the H(2)SO(4) could be recovered from the leach solution which contained 61.7 g/L free H(2)SO(4), 11.2 g/L Fe and 4.60 g/L V at a flow rate of 0.19x10(-3) m(3)/h m(2). V and Fe ion rejection were within 93-95 and 92-94%, respectively. A preliminary economic evaluation revealed that an investment in this process could be recovered within 27 months.
Wei
Chang
C
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Yunnan 650093, China.
Li
Xingbin
X
Deng
Zhigan
Z
Fan
Gang
G
Li
Minting
M
Li
Cunxiong
C
D000143:Acids; D002617:Chemical Industry; D003247:Conservation of Natural Resources / Q000379:methods*; D003956:Dialysis; D004058:Diffusion; D007220:Industrial Waste / Q000517:prevention & control; D007474:Ion Exchange; D012996:Solutions; D013464:Sulfuric Acids / Q000302:isolation & purification*; D014639:Vanadium
D000143:Acids; D007220:Industrial Waste; D012996:Solutions; D013464:Sulfuric Acids; D014639:Vanadium; C033158:sulfuric acid