PROCESS FOR PURIFYING SOLUTIONS CONTAINING SULFURIC ACID AT LOW CONCENTRATION

摘要

Process for the recovery of H2SO4 from dilute sulfuric acid solutions containing combined acid sulfates by heating these solutions in the presence of excess ammonium sulfate to a temperature from between about 100 DEG and 160 DEG C. until a concentration of free H2SO4 between 50 and 59% by weight is obtained to precipitate the combined acid sulfates.