采用流态化浸出技术研究了从环氧乙烷用失效银催化剂中银的工艺。考察了流化状态、硝酸用量、反应时间等参数对银浸出效果的影响，得到了最佳工艺条件。采用自制流化态溶解装置，使废催化剂处于流动翻滚状态，硝酸用量为理论用量的1.2倍，反应时间不低于1 h，银的浸出率可达到99.88%。浸出液氯化沉淀后采用传统方法精炼提纯，得到99.95%纯度的银。
For the recovery of silver from spent catalyst used in ethane oxide industry, fluidization technique was introduced to accelerate the leaching of silver from spent catalyst. The influencing parameters on the leaching, such as flow state and nitric acid dosage and reaction time, were studied in order to obtain the optimum process conditions. A 99.88%of the silver leaching rate could be achieved within 1 h when the spent catalyst was in fluid state in a special reactor containing a nitric acid amount 1.2 times as the theoretical one. The silver in the leaching solution was purified by conventional AgCl precipitating method to reach a purity of 99.95%.
参考文献
| [1] | 赵楠楠.环氧乙烷生产技术进展及产能现状[J].化工时刊,2015(05):23-26. |
| [2] | 杨忠兵.环氧乙烷产业技术现状与展望[J].石油化工技术与经济,2014(06):52-56. |
| [3] | 崔小明.我国环氧乙烷行业现状及发展分析[J].石油化工技术与经济,2014(01):22-27. |
| [4] | 苗静;王延吉.乙烯环氧化制环氧乙烷银催化剂研究进展[J].工业催化,2005(4):44-47. |
| [5] | 李胜利;曹志涛;张晓琳.乙烯氧化制环氧乙烷催化剂的技术进展[J].化学工业与工程技术,2013(3):7-9,13. |
| [6] | 甘霖;王弘轼;朱炳辰;徐懋生;王忠良.环氧乙烷合成银催化剂宏观动力学及失活分析[J].化工学报,2001(11):969-973. |
| [7] | 刘宗语.乙烯氧化制环氧乙烷银催化剂研究进展[J].当代石油石化,2012(10):22-26,46. |
| [8] | 黄万抚;颜娜;肖芫华;李新冬.从废银催化剂中回收银的研究[J].矿业研究与开发,2014(1):45-47. |
| [9] | 王敏.从含银的废催化剂中回收白银[J].再生资源研究,2007(01):12-13. |
| [10] | 黄又明.废银催化剂的回收工艺[J].现代化工,2001(04):36-38. |
| [11] | 李富荣;郑远东.从废银催化剂中回收银的工艺试验[J].中国资源综合利用,2001(9):10-11. |
| [12] | 薛福连.废银催化剂的再生及回收[J].上海有色金属,2004(01):35-37. |
| [13] | 张卫.关于废银催化剂回收工艺的研究[J].河南科技,2013(11):53-54. |
| [14] | 赵飞;王欢;贺小塘;韩守礼;赵雨;刘文;吴喜龙.银的二次资源综合回收[J].贵金属,2013(z1):42-46. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%