碱溶法回收废SCR脱硝催化剂中的二氧化钛

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武文粉^1,2，李会泉^1,2*，孟子衡^1,2，王晨晔¹，王兴瑞¹，赵晨^1,2

1. 中国科学院过程工程研究所绿色过程与工程重点实验室，湿法冶金清洁生产技术国家工程实验室，北京 100190 2. 中国科学院大学化学工程学院，北京 100049

收稿日期:2019-03-10修回日期:2019-04-15出版日期:2019-06-28发布日期:2019-06-10
通讯作者:李会泉

基金资助:温和酸碱活化废弃SCR脱硝催化剂协同提取钒钨新工艺应用基础研究

Recovery of TiO₂ from spent SCR denitration catalyst by alkali hydrothermal method

Wenfen WU^1,2, Huiquan LI^1,2*, Ziheng MENG^1,2, Chenye WANG¹, Xingrui WANG¹, Chen ZHAO^1,2

1. Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Cleaner Production Technology of Hydrometallurgy, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2019-03-10Revised:2019-04-15Online:2019-06-28Published:2019-06-10
Contact:LI Hui-quan

摘要/Abstract

摘要： 采用碱溶法分离回收燃煤电厂废SCR脱硝催化剂中的载体成分TiO2，通过正交实验考察了NaOH浓度、反应温度、固液比和转速对碱溶法回收TiO2过程中主要杂质W浸出分离、W和Ti浸出率的影响规律及浸出渣物相的变化规律，所得含钛浸出渣经20% H2SO4溶液或20% HCl溶液洗涤、煅烧回收TiO2。结果表明，反应温度对杂质W浸出影响最明显。回收Ti元素的最优条件为反应温度110℃及NaOH浓度40wt%、固液比1/5 g/mL、转速400 r/min，该条件下废SCR脱硝催化剂中W的脱除率达87.5%，Ti的溶出率仅为0.04%，浸出液中W/Ti浓度比为210。经H2SO4处理后生成锐钛型TiO2，经HCl处理生成金红石型TiO2，二者纯度均大于98%，实现了TiO2晶体的可控制备。

引用本文

武文粉李会泉孟子衡王晨晔王兴瑞赵晨. 碱溶法回收废SCR脱硝催化剂中的二氧化钛[J]. 过程工程学报, 2019, 19(S1): 72-80.
Wenfen WU Huiquan LI Ziheng MENG Chenye WANG Xingrui WANG Chen ZHAO. Recovery of TiO₂ from spent SCR denitration catalyst by alkali hydrothermal method[J]. Chin. J. Process Eng., 2019, 19(S1): 72-80.

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