Batch and continuous separation of acetic acid from succinic acid in a feed solution with high concentrations of carboxylic acids by emulsion liquid membranes

▶ Successful separation of acetic acid from succinic acid by batch and continuous ELMs. ▶ High extraction efficiency obtained in batch and continuous ELM systems. ▶ Three key operating variables are NaOH and C9232 concentrations, and volume ratio between phases.