The issue of removing arsenic trioxide when distilling sulfuric acid to produce reagent-grade sulfuric acid
Thread Content
I would like to ask: when sulfuric acid is distilled to produce reagent-grade sulfuric acid, does arsenic trioxide get vaporized into the gas phase? I have found that the boiling point of arsenic trioxide is more than 100 degrees higher than that of sulfuric acid. What is the allowable level of arsenic trioxide in reagent-grade sulfuric acid, in terms of ppm?
Distillation methods, whose quality is not guaranteed, are gradually being phased out.
Thank you; currently, the absorption method is more commonly used in research
A license can be obtained for distillation, but there are still certain difficulties in obtaining one for absorption
For this issue, you can contact Mr. Gu from Jiangsu Shuangshi Environmental Protection; he has resolved similar problems before.