Process for the recovery of {68 -caprolactam from a reaction mixture of {68 -caprolactam and sulphuric acid

摘要

A process for removing sulfuric acid from reaction mixtures containing sulfuric acid and epsilon -caprolactam by treating the sulfuric acid with ammonia and sulfur dioxide to produce ammonium sulfate salts and reducing the ammonium sulfate salts to ammonia and sulfur dioxide.