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(Ⅵ) and V(Ⅴ) completely, which results in a vanadium content in the range of 0.05%-0.20% in ammonium molybdate products. Traditional method of removing vanadium from molybdenum solution is precipitation... Removal of vanadium from ammonium molybdate solution by ion exchange LI Qing-gang(李青刚)1, 2, ZHANG Qi-xiu(张启修)2, ZENG Li(曾 理)2, XIAO Lian-sheng(肖连生)1, 2, YANG Ya-nan(杨亚男)2 1. State Key Laboratory......
with purity of 99.6% is obtained by calcining the crystals at 560 °C for 2 h. Key words: chromium-containing vanadate solution; calcium salt precipitating vanadium; sodium bicarbonate leaching; ammonium salt... process including selective precipitation of vanadium, vanadium leaching and preparation of vanadium pentoxide. By adding Ca(OH)2 and ball milling, not only the V in the solution can be selectively......
合利用, 2008, 4: 14-18.KANG Xing-dong, ZHANG Yi-min, LIU Tao, LIU Jian-ming, LU Min, WANG Ping. Experimental study on preparation of high-purity V2O5 with acidic ammonium salt precipitation of vanadium..., the optimal process conditions are obtained, which make the vanadium conversion from calcium vanadate reach 97.35%. Key words: vanadium slug; sub-molten salt; calcium vanadate; carbonization-ammonium......
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under atmospheric pressure, the vanadium separation from leachate by solvent extraction and stripping, followed by precipitation of ammonium vanadate and thermal decomposition. Under the optimum... or vanadium pentoxide by ammonia or ammonium. The precipitation of the vanadium from the stripping solution was performed under the conditions that an excess of 25% NaClO3 was added compared to the total......
slag, including direct leaching, roasting leaching, sub-molten salt leaching, and electro-oxidation leaching [9–12]. Roasting and leaching methods involve calcium salt roasting–acidic leaching... potential (298 K) table, in acidic solution, φθMnO2/Mn2+=+1.23 V, φθVO2+/V3+=+0.359 V, φθVO2+/V3+=+0.680 V. This indicates that MnO2 could oxidize low-valent vanadium to high-valent vanadium oxide [21......
="ChDivSummary" name="ChDivSummary"><正>A technique including direct acid leaching,vanadium precipitation with alkaline,sodium hydroxide releaching,impurity removing by ad- justing pH value,precipitation vanadium with ammonium chloride,and vanadium pentoxide by masting steps was proposed according to the characteristic of Xichuan clay vanadium mineral.The factors influencing leaching vanadium......
, is the effective phosphorus removal reagent and has been used for many years [14]. Magnesium salt methods are carried out for removing phosphorus by the precipitation of magnesium ammonium phosphate and magnesium... of magnesium ammonium phosphate precipitation method As mentioned above, the phosphorus can also be removed from ammonium tungstate solution as magnesium ammonium phosphate when the magnesium salt......
J. Cent. South Univ. Technol. (2011) 18: 1940-1944 DOI: 10.1007/s11771-011-0926-9 Extraction of vanadium from stone coal by modified salt-roasting process WANG Ming-yu(王明玉), WANG Xue-wen(王学文), SHEN... Abstract: In order to reduce the pollution of Cl2 and HCl released during extracting vanadium from stone coal by sodium chloride roasting, a modified salt-roasting process was proposed by adding......
E. Vanadium recovery from oil fly ash by leaching, precipitation and solvent extraction processes [J]. Waste Management, 2007, 27(3): 425-438. [3] Zeng L, Li Q g, Xiao L s. Extraction of vanadium... of production of vanadium from stone coal [J]. Inorganic Salt Industry, 2001, 33(5): 37-39. (in Chinese) [11] Mishra D, Kim D J, Ralph D E, Ahn J G, Rhee Y H. Bioleaching of vanadium rich spent......
