Precipitation of nesquehonite from homogeneous supersaturated solutions
文献类型：期刊论文
| 作者 | Cheng, Wenting; Li, Zhibao |
| 刊名 | CRYSTAL RESEARCH AND TECHNOLOGY
 |
| 出版日期 | 2009-09-01 |
| 卷号 | 44期号:9页码:937-947 |
| 关键词 | homogeneous precipitation supersaturation nesquehonite magnesium oxide |
| ISSN号 | 0232-1300 |
| 通讯作者 | Li, ZB |
| 英文摘要 | The homogeneous (unseeded) precipitation of nesquehonite (MgCO(3)center dot 3H(2)O) was studied over the temperature range of 10-40 degrees C. Precipitation was triggered by the supersaturation created by mixing MgCl(2) solution (0.5-1.5 M) with Na(2)CO(3) solution in the same concentration range. The Meissner's method was adopted in the calculation of supersaturations during the MgCl(2)-Na(2)CO(3) reaction to monitor the precipitation. Solids were identified using X-ray diffraction (XRD) analysis and scanning electron microscope (SEM) images. In the temperature range of 10-40 degrees C, MgCO(3)center dot 3H(2)O with needle-like or gel-like morphology was precipitated. It was seen that the length, width and surface smoothness of the particles changed with reaction temperature and supersaturation. The supersaturation (S) was in the range of 1.09-58.68 during titration of Na(2)CO(3) solution. The dimension of the crystals increased with longer addition time (or lower initial concentration of reactant) at the same temperature. Slower addition via titration of 2 h followed by 2 h of equilibration at 40 degrees C proved successful in producing well developed needle-like MgCO(3)center dot 3H(2)O crystals of 30-50 mu m long and 3-6 mu m wide. MgCO(3)center dot 3H(2)O obtained were calcined to produce highly pure magnesium oxide (MgO) at 800 degrees C. The morphology of MgO was similar to that of their corresponding precursors. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Crystallography |
| 研究领域[WOS] | Crystallography |
| 关键词[WOS] | AQUEOUS-SOLUTIONS ; ACTIVITY-COEFFICIENTS ; MAGNESIUM CARBONATE ; STRONG ELECTROLYTES ; TEMPERATURE ; SYSTEM ; FABRICATION ; MORPHOLOGY ; SOLVENT ; SURFACE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000270109500006 |
| 公开日期 | 2013-11-29 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6590]  |
| 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 | Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Wenting,Li, Zhibao. Precipitation of nesquehonite from homogeneous supersaturated solutions[J]. CRYSTAL RESEARCH AND TECHNOLOGY,2009,44(9):937-947. |
| APA | Cheng, Wenting,&Li, Zhibao.(2009).Precipitation of nesquehonite from homogeneous supersaturated solutions.CRYSTAL RESEARCH AND TECHNOLOGY,44(9),937-947. |
| MLA | Cheng, Wenting,et al."Precipitation of nesquehonite from homogeneous supersaturated solutions".CRYSTAL RESEARCH AND TECHNOLOGY 44.9(2009):937-947. |
入库方式： OAI收割
来源：过程工程研究所
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