Study on the application of waste nitric acid in production process of ferric salt
Using the reactivity of sulfuric acid pickling waste liquid and waste nitric acid under certain conditions,the waste nitric acid is decomposed,and the produced nitric oxide gas is used as the catalyst for oxygen oxidation to prepare ferric salt products.The remaining products are further treated to recycle valuable substances with harmful impurities removed.In this paper,a new process of waste nitric acid disposal was proposed,with less difficulty and lower cost of waste nitric acid treatment,which realizes the full utilization of hazardous waste,and good social benefits and economic value.