Preparation of High Quality Lanthanum Carbonate and Lanthanum Oxide by Composite Precipitant
文献类型：期刊论文
| 作者 | Zhang, Jikai1,3,4; Zheng, Shili2,4; Li, Ping2,4; Yang, Youming1; Guan, Xindi1,4; Zhou, Jieying1,4; Chen, Dongying3 |
| 刊名 | Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society
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| 出版日期 | 2022-08-01 |
| 卷号 | 40期号:4页码:624-632 |
| 关键词 | Ammonia - Calcium carbonate - Carbon dioxide - Carbonation - Chlorine compounds - Coprecipitation - Environmental technology - Feeding - Molar ratio - Morphology - Particle size - Particle size analysis - pH - Rare earths - Sodium Carbonate - X ray diffraction |
| ISSN号 | 10004343 |
| DOI | 10.11785/S1000-4343.20220409 |
| 英文摘要 | In order to meet the demand of environmental protection and economic precipitant and precipitation technology in rare earth industry production, lanthanum chloride was precipitated with sodium bicarbonate and sodium carbonate as composite precipitant, and lanthanum carbonate was prepared by concurrent feeding. Lanthanum oxide was obtained by calcining lanthanum carbonate. SEM, particle size analysis, XRD and other characterization methods were used. The effects of feeding methods, ratio of composite precipitant, reaction temperature, concentration of lanthanum chloride, flow rate of lanthanum chloride and precipitant, pH value range in precipitation process and the addition of crystal seeds on the physical or chemical properties of lanthanum carbonate and corresponding lanthanum oxide, such as morphology, particle size, total rare earth (REO), content of Cl- and Na2O were studied. The morphology and particle size of lanthanum carbonate or lanthanum oxide were characterized by SEM, particle size analysis and XRD. The results showed that lanthanum carbonate with easy sedimentation and excellent crystal shape can be obtained under the following conditions: the molar ratio of sodium bicarbonate to sodium carbonate in the compound precipitator is 1:4, the reaction temperature is 30 , the concentration of lanthanum chloride is 110 g路L-1 and the flow rate is 6.0 mL路min-1, the pH value of the precipitation process is 4.0~4.5, and a proper amount of lanthanum carbonate crystal seeds are added. The particle size D50 is 23.46 渭m, and the morphology of La2(CO3)3路8H2O is like spherical crystal with stacked sheet shape. After burning lanthanum carbonate, the total amount of rare earth in lanthanum oxide products is 99.62%, and the contents of Cl- and Na2O are 0.01% and 0.001%, respectively. It meets the requirements of La2O3-4N5 brand in national standard GB/T 4154-2015. The composite precipitant has the advantages of low cost, no ammonia nitrogen pollution and avoids the disadvantages of single precipitant. The product with controllable quality can be obtained by adjusting the proportion of precipitant, precipitation conditions and process control, which provides a technical basis for actual production. 漏 2022, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved. |
| 学科主题 | Sodium Bicarbonate |
| 出版者 | Editorial Office of Chinese Rare Earths |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/61235]  |
| 作者单位 | 1.Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou; 341000, China 2.Innovation Academy for Green Manufacture, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 3.Ganzhou Nonferrous Metallurgy Research Institute Co., Ltd., Ganzhou; 341000, China 4.Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou; 341101, China |
| 推荐引用方式 GB/T 7714 | Zhang, Jikai,Zheng, Shili,Li, Ping,et al. Preparation of High Quality Lanthanum Carbonate and Lanthanum Oxide by Composite Precipitant[J]. Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society,2022,40(4):624-632. |
| APA | Zhang, Jikai.,Zheng, Shili.,Li, Ping.,Yang, Youming.,Guan, Xindi.,...&Chen, Dongying.(2022).Preparation of High Quality Lanthanum Carbonate and Lanthanum Oxide by Composite Precipitant.Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society,40(4),624-632. |
| MLA | Zhang, Jikai,et al."Preparation of High Quality Lanthanum Carbonate and Lanthanum Oxide by Composite Precipitant".Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society 40.4(2022):624-632. |
入库方式： OAI收割
来源：过程工程研究所
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