A method for obtaining pure 1,12dodecandicarbonsaeure

摘要

A process for purifying 1,12-dodecanedioic acid by heat-treating 1,12-dodecanedioic acid with an aqueous solution containing acid sulfite ion or sulfite ion is disclosed, said 1,12-dodecanedioic acid being prepared by oxidizing cyclododecanol and/or cyclododecanone with nitric acid.