A new cost-effective and eco-friendly way to recover sulfuric acid waste using bleaching soil

Sulfuric acid is one of the acidic wastes produced in the edible oil refining industry during testing to determine the oxidation stability of the oil. Sulfuric acid is required as a rinsing solvent to clean Rancimat glass tubes. This acid cannot be discharged directly into the environment. Use processing and acid consumption must be performed to comply with environmental quality standards. The aim of this study was to purify and recover acid waste. In this new method, first water and other solvents are removed under a vacuum system at 80 ° C, then bleaching soil is added to sulfuric acid and placed at 80 ° C for half an hour, and then white soil. The solvent is separated by centrifugation. Recovery was about 90%. An identical sample of oil with oxidation stability was tested with a Rancimat device And the results showed no change with fresh sulfuric acid. This study developed an innovative, effective, and simple method for the recycling of acid waste that can successfully resolve this significant problem in industry. This method both reduces carbon emissions and recycles valuable resources, which is of important environmental and economic significance.