摘要
针对废镍钼加氢催化剂提出了一种双氧水结合氨水氧化浸出工艺,选择性浸出其中的钼。通过实验研究了双氧水用量、浸出温度、浸出时间对钼浸出率的影响,并对浸出渣进行了SEM、EDS、XRD表征。结果表明:在滴加氨水维持反应体系pH为8~9、双氧水用量为2.0倍理论量、浸出温度为80℃、浸出时间为120min、搅拌速度为250r/min条件下,Mo浸出率可达到97%以上,同时Al和Ni的溶解率维持在较低水平。
An oxidative leaching process of hydrogen peroxide combined with ammonia was proposed for selective leaching of molybdenum from spent nickel-molybdenum hydrogenation catalysts.The effects of hydrogen peroxide dosage,leaching temperature and leaching time on the leaching rate of molybdenum were studied by experiments,and the leaching residue was characterized by SEM,EDS and XRD.The results show that the leaching rate of molybdenum can reach over 97%under the conditions of a reaction system pH of 8~9 maintained by adding ammonia,hydrogen peroxide dosage of 2.0 times the theoretical amount,leaching temperature of 80℃,leaching time of 120 min,and stirring speed of 250 r/min,while the dissolution rates of aluminum and nickel remain at a low level.
作者
赵歌
张广积
梁杰
沈蔡龙
吕岳奋
陈彦臻
杨超
ZHAO Ge;ZHANG Guang-ji;LIANG Jie;SHEN Cai-long;LYU Yue-fen;CHEN Yan-zhen;YANG Chao(School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;National Key Laboratory of Petrochemical Molecular Transformation and Reaction Engineering&CAS Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2023年第6期16-22,共7页
Rare Metals and Cemented Carbides
基金
国家重点研发计划(2022YFB3504003)
国家自然科学基金国际(地区)合作与交流项目(21961160745)
化学与精细化工广东省实验室项目(1922006)。
关键词
废加氢催化剂
双氧水
氨水
氧化浸出
钼
铝
镍
spent hydrogenation catalyst
hydrogen peroxide
ammonia
oxidative leaching
moly bdenum
aluminum
nickel
