PREPARATION METHOD OF CATECHOL AND HYDROQUINONE

摘要

PURPOSE: A method for preparing catechol and hydroquinone at a same time from phenol is provided, to reduce the generation of waste water remarkably by not using a solvent and to improve yield. CONSTITUTION: The method comprises the step of oxidizing phenol in the presence of a sulfate compound catalyst represented by Mx(SO4)y and a ketone-based additive in 30 wt% or more of hydrogen peroxide aqueous solution at a temperature of 50-150 deg.C, wherein M is (CH3)2, Ga, Ce or Nd; x is 1 or 2; and y is 1-3. Preferably the molar ratio of phenol and hydrogen peroxide is 1 : 0.05-0.5; the molar ratio of hydrogen peroxide and the ketone-based additive is 1 : 0.5-3; and the ketone-based additive is selected from the group consisting of methylisobutylketone, acetone, methylethylketone and diethylketone.