摘要
以含锌废催化剂为原料,经酸浸、除杂、锌粉置换、合成等工艺制得碱式碳酸锌,再经过滤、洗涤、干燥、煅烧制备纳米氧化锌。考察了酸浸工艺硫酸溶液含量和液固比(硫酸与含锌废催化剂的质量比)对锌浸出率的影响,以及煅烧温度对纳米氧化锌质量的影响。实验结果表明:在硫酸质量分数为30%、液固比为5的最佳酸浸工艺条件下,锌浸出率为92%;在最佳煅烧温度为400℃的条件下,氧化锌质量分数大于95%,比表面积大于50 m2/g;纳米氧化锌颗粒大小均匀,平均粒径小于50 nm。
Spent zinc-containing catalyst was used as raw material to prepare basic zinc carbonate by the processes of acid leaching,impurity removing,zinc dust replacing and synthesizing,and then to prepare nano zinc oxide by the processes of filtration,washing,drying and calcinating. The effects of sulfuric acid content and liquid-solid ratio （mass ratio of sulfuric acid to spent zinc-containing catalyst） on zinc leaching rate,and the effect of calcination temperature on the quality of nanometer zinc oxide were studied. The experimental results show that：Under the optimum leaching conditions of sulfuric acid mass fraction 30% and liquid-solid ratio 5,the leaching rate of zinc is 92%;Under the optimum calcination temperature of 400 ℃,the mass fraction of zinc oxide is greater than 95%,and the specific surface area is larger than 50 m2/g. The nano zinc oxide particles are uniform with less than 50 nm of average size.
出处
《化工环保》
CAS
CSCD
北大核心
2014年第1期64-66,共3页
Environmental Protection of Chemical Industry
关键词
含锌废催化剂
酸浸
煅烧
纳米氧化锌
综合利用
spent zinc-containing catalyst acid leaching calcination nano zinc oxide comprehensive utilization
