摘要
硝酸是合成气间接法制乙二醇生产过程中的副产物,实际操作硝酸含量远比设计值高很多,致使污水处理运行不稳定,高盐废水难以处理,零排放很难实现。乙二醇装置内设置硝酸回收系统,硝酸催化还原法将副产硝酸用NO催化还原为N_2O_3并作为亚硝化原料返回系统,不论是经济性上还是操作难以程度上都优于在污水处理单元设置高盐废水。
The nitric acid is the by-product of the ethylene glycol plant. The content of nitric acid at actual plant is higher than the design value. It is difficult to implement the zero discharge. NO deoxidizes to N2O3 at catalyst. It is economic to install nitric acid recovery on EG plant than on wastewater treatment.
出处
《广州化工》
CAS
2017年第14期145-146,159,共3页
GuangZhou Chemical Industry
关键词
乙二醇
硝酸
甲醇
污水处理
ethylene glycol
nitric acid
methanol
wastewater treatment
