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## Extraction of Sulfuric Acid from Aqueous Glycolic Acid 

Sulfuric acid was added to a 85 wt% glycolic acid-15 wt% water mixture to produce a solution comprising 3 wt% sul› furic acid. Extraction solvents were prepared by mixing an amine and diluents(s) as specified in Table 22. Five grams of each amine solvent solution was mixed with five grams of the sulfuric acid-aqueous glycolic acid mixture and allowed equilibrate at the temperature specified in Table 22. If two phases resulted, samples of each phase were analyzed by x-ray for sulfur content and converted into a sulfuric acid concentration in each phase (grams of sulfuric acid per gram of amine phase and grams of sulfuric acid per gram of aque› ous glycolic acid phase). 

## Example 49 

