METHOD OF SEPARATING HYDROXY AROMATIC COMPOUNDS FROM ITS MIXTURE TO ACHIEVE EFFECTIVE SEPARATION WITH HIGH YIELD AND HIGH PURITY

摘要

PURPOSE: A method of extracting hydroxy aromatic compounds from mixture thereof is provided, which can effectively extracting certain hydroxy aromatic compound such as catechol, hydroquinone and p-benzoquinone with improved yield and purity, by using each different boiling point and solubility to a certain solvent. CONSTITUTION: The method of separating a mixture of hydroxy aromatic compounds including catechol, hydroquinone and p-benzoquinone comprises subsequent application of a vacuum distillation method, which uses the intrinsic boiling point of each compound, and a fractional dissolution method, which uses the difference in solubility to a certain solvent, wherein catechol is separated first by the vacuum distillation, and then hydroquinone and p-benzoquinone are separated by the fractional dissolution, and wherein the solvent is at least one selected from benzene, toluene and xylene.