FIELD: concentration of diluted sulfuric acid. SUBSTANCE: invention eliminates basic causes of acid losses, i.e. decomposition and foaming, by heating it to 110-150 C (below its boiling temperature) and by removal of water in the form of azeotrope with benzene introduced into the system in a vapor or liquid phase. EFFECT: reduced losses of acid during its concentration by evaporation. 11 dwg
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Authors
Dates
1995-08-27—Published
1992-04-20—Filed