Preparation of Cr2O3 precursors by hydrothermal reduction in the abundant Na2CO3 and Na2CrO4 solution
文献类型：期刊论文
| 作者 | Wei, Guang-ye2; Qu, Jing-kui1,3; Zheng, Yu-dong2; Qi, Tao1,3; Guo, Qiang1,3 |
| 刊名 | INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
 |
| 出版日期 | 2012-11-01 |
| 卷号 | 19期号:11页码:978-985 |
| 关键词 | chromium oxide hydrothermal reduction sodium carbonate methanal laterite ores |
| ISSN号 | 1674-4799 |
| 通讯作者 | Qi, T |
| 英文摘要 | Precursors of chromium oxide (p-Cr2O3) were prepared by reducing hexavalent chromium in the presence of sodium carbonate solution under hydrothermal conditions. Methanal was used as the reductant, and carbon dioxide was the acidulating agent. The influences of reaction temperature, initial pressure of carbon dioxide, isothermal time and methanal coefficient on Cr(VI) reduction were investigated. Experimental results showed that Cr(VI) was reduced to Cr(III) with a yield of 99%. Chemical titration, thermogravimetry (TG), X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM) were used to characterize the p-Cr2O3 and Cr2O3. The series of p-Cr2O3 were found to be multiphase even if they presented different colors, from gray green to lavender. After these p-Cr2O3 samples were calcined, the product of rhombohedral Cr2O3 with a purity of 99.5wt% was obtained. |
| WOS标题词 | Science & Technology ; Technology ; Physical Sciences |
| 类目[WOS] | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing |
| 研究领域[WOS] | Materials Science ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing |
| 关键词[WOS] | MAGNETIC-PROPERTIES ; LIMONITIC LATERITE ; AQUEOUS-SOLUTIONS ; CHROMIC OXIDE ; NANOPARTICLES ; OXIDATION ; SOLUBILITY ; MECHANISM ; KINETICS ; ACID |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000310827400002 |
| 公开日期 | 2013-10-11 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3173]  |
| 专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
| 作者单位 | 1.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Guang-ye,Qu, Jing-kui,Zheng, Yu-dong,et al. Preparation of Cr2O3 precursors by hydrothermal reduction in the abundant Na2CO3 and Na2CrO4 solution[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2012,19(11):978-985. |
| APA | Wei, Guang-ye,Qu, Jing-kui,Zheng, Yu-dong,Qi, Tao,&Guo, Qiang.(2012).Preparation of Cr2O3 precursors by hydrothermal reduction in the abundant Na2CO3 and Na2CrO4 solution.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,19(11),978-985. |
| MLA | Wei, Guang-ye,et al."Preparation of Cr2O3 precursors by hydrothermal reduction in the abundant Na2CO3 and Na2CrO4 solution".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 19.11(2012):978-985. |
入库方式： OAI收割
来源：过程工程研究所
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