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| 双氧水协同硝酸浸出失效银催化剂中银的研究 |
| Study on hydrogen peroxide synergistic nitric acid leaching of silver in a failed silver catalyst |
| Received:April 18, 2023 |
| DOI： |
| 中文关键词: 含银废催化剂 硝酸、双氧水 浸出 银 |
| 英文关键词: spent silver catalysts nitric acid hydrogen peroxide leaching silver |
| 基金项目:云南省重大科技专项(202102AB080007-4)；云南贵金属实验室产业化技术攻关(YPML-2022050208) |
| Author Name | Affiliation | | YANG Quan | Sino-Platinum Metals Resources Yimen Co., Ltd., Yuxi 651100, Yunnan, China | | CHEN Mingjun | Sino-Platinum Metals Resources Yimen Co., Ltd., Yuxi 651100, Yunnan, China | | HAN Jibiao | Sino-Platinum Metals Resources Yimen Co., Ltd., Yuxi 651100, Yunnan, China
Yunan Precious Metals Laboratory Co.Ltd., Kunming 650106, China | | HU Jianjun | Sino-Platinum Metals Resources Yimen Co., Ltd., Yuxi 651100, Yunnan, China | | YAO Yiqin | Sino-Platinum Metals Resources Yimen Co., Ltd., Yuxi 651100, Yunnan, China | | YAO Yanbo | Sino-Platinum Metals Resources Yimen Co., Ltd., Yuxi 651100, Yunnan, China | | FU Hao | Sino-Platinum Metals Resources Yimen Co., Ltd., Yuxi 651100, Yunnan, China | | LI Yong | Sino-Platinum Metals Resources Yimen Co., Ltd., Yuxi 651100, Yunnan, China
Yunan Precious Metals Laboratory Co.Ltd., Kunming 650106, China |
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| 中文摘要: |
| 在传统硝酸浸出含银废催化剂中银的基础上，研究了双氧水浸出银的影响。在2 mol/L HNO3，浸出温度70 °C，浸出时间120 min，固液比1:4条件下，通过逐次加入双氧水，银浸出率为99.76%，获得了较好浸出效果。浸出过程中，双氧水将Ag氧化为Ag2O，可有效提高银的浸出率，同时硝酸与银反应产生的氮氧化物被双氧水氧化生成硝酸继续参加反应。采用硝酸-双氧水作为浸出剂保证了银高效浸出，减少了氮氧化物排放，为含银废催化剂绿色高效回收提供了理论基础及技术支撑。 |
| 英文摘要: |
| The effect of hydrogen peroxide leaching of silver was studied on the basis of traditional nitric acid leaching of silver from spent silver catalysts. The silver leaching rate was 99.76% by slowly adding hydrogen peroxide in the conditions of 2 mol/L HNO3, leaching temperature 70 °C, leaching time 120 minutes, and solid-liquid ratio 1:4, which had good leaching effect. Hydrogen peroxide oxidizes Ag to Ag2O, which can effectively improve the leaching rate of silver, while the nitrogen oxide produced by the reaction between nitric acid and silver is oxidized by H2O2 to generate nitric acid and continue to participate the reaction. The use of nitric acid hydrogen peroxide as a leaching agent ensures efficient silver leaching, reduces the emission of nitrogen oxides, and provides a theoretical basis and technical support for the green and efficient recovery of spent silver catalysts. |
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