A New Method of Potassium Chromate Production from Chromite and KOH-KNO3-H2O Binary Submolten Salt System
文献类型：期刊论文
| 作者 | Sun, Zhi1; Zhang, Yi1; Zheng, Shi-Li1; Zhang, Yang1,2 |
| 刊名 | AICHE JOURNAL
 |
| 出版日期 | 2009-10-01 |
| 卷号 | 55期号:10页码:2646-2656 |
| ISSN号 | 0001-1541 |
| 关键词 | chromite ore potassium chromate mechanism decomposition submolten salt |
| 通讯作者 | Zhang, Y |
| 英文摘要 | A new method of chromate production by applying a new reaction system of KOH-KNO3-H2O (binary submolten salt system) is proposed and proved feasible. Under conditions of temperature 350 degrees C, KOH-to-chromite ore ratio 2:1, stirring speed 700 rpm, KNO3-to-chromite ore ratio 0.8:1, oxygen partial pressure 50%, and gas flow 1 L/min, chromium conversion ratio obtained is >98% with reaction time around 300 min. The decomposition of chromite ore in the system is a typical process of solid-liquid-gas reaction, which is coordinately controlled by mass diffusion in product layer and interface reaction. Apparent activation energy of decomposition in the temperature range from 280 to 370 degrees C is 55.63 kJ/mol. During reaction, oxygen dissolves into KOH-KNO3-H2O melt system first and some cluster, e.g. O-2(2-), is formed and the mass diffusion 2 coefficient of the cluster was calculated. The system can be considered as both a media of oxygen transportation and reactant donator. Potassium nitrate plays a role of catalyst in the oxidation decomposition reaction of chromite ore and potassium hydroxide. (C) 2009 American Institute of Chemical Engineers AIChE J, 55: 2646-2656, 2009 |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | MANUFACTURING PROCESS ; KINETICS ; OXYCHLORINATION ; DECOMPOSITION ; HYDROXIDE ; ORE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000270503300014 |
| 公开日期 | 2013-11-29 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6569]  |
| 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.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Coll Chem & Chem Engn, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Zhi,Zhang, Yi,Zheng, Shi-Li,et al. A New Method of Potassium Chromate Production from Chromite and KOH-KNO3-H2O Binary Submolten Salt System[J]. AICHE JOURNAL,2009,55(10):2646-2656. |
| APA | Sun, Zhi,Zhang, Yi,Zheng, Shi-Li,&Zhang, Yang.(2009).A New Method of Potassium Chromate Production from Chromite and KOH-KNO3-H2O Binary Submolten Salt System.AICHE JOURNAL,55(10),2646-2656. |
| MLA | Sun, Zhi,et al."A New Method of Potassium Chromate Production from Chromite and KOH-KNO3-H2O Binary Submolten Salt System".AICHE JOURNAL 55.10(2009):2646-2656. |
入库方式： OAI收割
来源：过程工程研究所
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