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| STUDIES ON KINETICS OF LEACHING OF Ca-CONTAINING VANADATES IN CARBONATEBICARBONATE BUFFER SOLUTION |
| LIU Houyuan; KE Jiajun; CHEN Jiayong (Chen Chia-yung) (Institute of Chemical Metallurgy. Academia Sinica; Beijing) |
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Cite this article:
LIU Houyuan; KE Jiajun; CHEN Jiayong (Chen Chia-yung) (Institute of Chemical Metallurgy. Academia Sinica; Beijing). STUDIES ON KINETICS OF LEACHING OF Ca-CONTAINING VANADATES IN CARBONATEBICARBONATE BUFFER SOLUTION. Acta Metall Sin, 1983, 19(6): 72-78.
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Abstract The kinetics of V leaching from Ca(VO_3)_2 and NaCaVO_4 in Na_2CO_3-NaHCO_3 buffer solution has been investigated. It has been shown that the kinetics of these two samples is rather different. The rate of leaching of Ca(VO_3)_2 is controlled by the parallel reactions between Ca(VO_3)_2 with Na_2CO_3 and NaHCO_3 respectively. No reaction occurs between NaCaVO_4 and Na_2CO_3 at least in the experimental range of the present study, the leaching rate of NaCaVO_4 with NaHCO_3 is controlled by the chemical adsorption of HCO_3~- ions on the solid surface.
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Received: 18 June 1983
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1 冯光熙;何晋秋;黄祥玉;李国良;和树桐;徐国胤;罗发印;葛书华;洪秉信,成都科技大学学报,1 (1981) ,1．
2 刘福臻;徐国胤;田平荣;稀有金属,2 (1981) ,20．
3 柯家骏;李道文;李希明;岳良东;冯光熙;黄祥玉;何晋秋;李国良;葛书华,高等学校化学学报,3 (1982) ,98．
4 朱秀松;李军,化工冶金,2 (1980) ,161．
5 Harte, C. R., Jr.; Baker, E. M.; Purcell, H. H., Ind. Eng. Chem., 25 (1933) , 528．
6 Levenspiel, O., Chemical Reaction Engineering, 2nd ed., Willey, 1972, p. 366． |
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