METHOD OF SYNTHESIS OF SULFURIC ACID BY NITROSOUS METHOD Russian patent published in 1995 - IPC

FIELD: chemical technology. SUBSTANCE: method involves oxidation of sulfur dioxide in denitration, output zones and in the zone of profound finishing using nitrogen oxides feeding with sulfuric acid solutions from the zone of preparing and regenerating nitrogen oxides. Method specificity: part of total water consumed (15-70%) is fed for distillation of penultimate apparatus of zone of nitrogen oxides preparing and regenerating and then directed in the main output apparatus. Other water part (85-30%) is fed for distillation of zone of profound sulfur dioxide finishing and then in apparatus of denitration zone. EFFECT: improved method of synthesis. 1 dwg