Clathrate-Based Recovery of Sulfuric Acid from Spent Acid

considered toxic pollutants. This work utilized clathrate phenomena experiments to re-concentrate dilute sulfuric acid. The selected clathrate guest was Cyclopentane. Each experiment s consists of a mixture of Cyclopentane and dilute sulfuric acids. The volume ratios of dilute sulfuric acid to Cyclopentane were (6:1, 4: 1, 3:1, and 2:1) with different initial concentrations (12.5%, 10%, 7.5%, 5%, 2.5%) of acid. It was found that the clathrate method was effective in re-concentrate dilute sulfuric acids with a maximum efficiency of 94% at the ratio of acid /cyclopentane (6:1) at 12.5% concentration. It can be concluded that the increase in dilute sulfuric acid /cyclopentane volume ratio leads increasing in removal efficiency while reducing the yield percentage and enriched Factor.