Study on Preparation of Lanthanum Carbonate with Mixed Precipitation Agent of Ammonium Bicarbonate and Ammonia AITranslate
Abstract AITranslate
Lanthanum carbonate was prepared by merging precipitation with ammonium bicarbonate and ammonia as the mixed precipitant and lanthanum chloride solution as the material. The effects were inves- tigated of rare earth concentration in base solution,reaction time and reuse of precipitation wastewater on product quality. Phase structure and morphology of the product were analyzed, and technical indexes were compared between the above process and the existing process with ammonium bicarbonate as the precipita- tion agent. The results show that the main component of lanthanum carbonate product is La2 （CO3）3 · 8H2O with〉0.07% Cl- and ≥45% REO under the conditions as follows ： rare earth concentration in base solution of 30 g/L,reaction time of 7 h and reusing precipitation wastewater. At the same time,5.9 m3 pre- cipitation wastewater is generated for 1 t REO with ammonium chloride content of 169 g/L. Compared with the existing process with ammonium bicarbonate as the precipitation agent,the use of mixed precipi- tants significantly reduces the output of wastewater and its treatment cost,and effective use of carbon re- duces the emission of CO2 and dosage of NH4 HCO3 ,with good economic and environmental benefits.
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Basic Information:
DOI：
Chinese Library Classification Number:TG146.45[金属学及工艺—金属材料]
Citation Information:
Lanthanum carbonate was prepared by merging precipitation with ammonium bicarbonate and ammonia as the mixed precipitant and lanthanum chloride solution as the material. The effects were inves- tigated of rare earth concentration in base solution,reaction time and reuse of precipitation wastewater on product quality. Phase structure and morphology of the product were analyzed, and technical indexes were compared between the above process and the existing process with ammonium bicarbonate as the precipita- tion agent. The results show that the main component of lanthanum carbonate product is La2 （CO3）3 · 8H2O with〉0.07% Cl- and ≥45% REO under the conditions as follows ： rare earth concentration in base solution of 30 g/L,reaction time of 7 h and reusing precipitation wastewater. At the same time,5.9 m3 pre- cipitation wastewater is generated for 1 t REO with ammonium chloride content of 169 g/L. Compared with the existing process with ammonium bicarbonate as the precipitation agent,the use of mixed precipi- tants significantly reduces the output of wastewater and its treatment cost,and effective use of carbon re- duces the emission of CO2 and dosage of NH4 HCO3 ,with good economic and environmental benefits.
quote
| GB/T 7714-2015 | [1] LIU Rui-jin, ZHAO Zhi-hua, SANG Xiao-yun, et al. Study on Preparation of Lanthanum Carbonate with Mixed Precipitation Agent of Ammonium Bicarbonate and Ammonia[J]. Rare Metals and Cemented Carbides, 2017(2): 51-54. |
| MLA | [1] LIU Rui-jin, et al., "Study on Preparation of Lanthanum Carbonate with Mixed Precipitation Agent of Ammonium Bicarbonate and Ammonia." Rare Metals and Cemented Carbides, no. 2, 2017, pp. 51-54. |
| APA | [1] LIU Rui-jin, ZHAO Zhi-hua, SANG Xiao-yun, ZHANG Zheng-zhong, WEI Di, ZHANG Guo-guang, ZHANG Wen-bin, & GAO Yuan. (2017). Study on Preparation of Lanthanum Carbonate with Mixed Precipitation Agent of Ammonium Bicarbonate and Ammonia. Rare Metals and Cemented Carbides(2), 51-54. |
| IEEE | [1] LIU Rui-jin, ZHAO Zhi-hua, SANG Xiao-yun, ZHANG Zheng-zhong, WEI Di, ZHANG Guo-guang, ZHANG Wen-bin, and GAO Yuan, "Study on Preparation of Lanthanum Carbonate with Mixed Precipitation Agent of Ammonium Bicarbonate and Ammonia," Rare Metals and Cemented Carbides, no. 2, pp. 51-54, 2017. keywords: {lanthanum carbonate;ammonium bicarbonate;ammonia;mixed precipitation agent;wastewaterreuse} |