Mixed acid should be allowed to flow for 1 minute in order to flush the pipesand cooling system. 应让混酸流一分钟,以便冲洗管道和冷却系统。
This article introduces that using mixed acid of nitric acid and sulfuric acid, beet waste-slag produces industrial product oxalic acid by ordinary pressure hydrocarbonylation. 本文介绍利用硝硫混酸常压氧化法,把甜菜废渣制成工业品草酸。