A method for the preparation of hydroquinone

The present invention relates to a method for the preparation of hydroquinone, the method using a water-soluble ruthenium complex [RuCl2 (TPPTS) 2] 2 as a catalyst, in a medium of pH of 0-4, by catalytic hydrogenation of preparation of hydroquinone benzoquinone, controlling the reaction time of 10-100 minutes. After completion of the reaction, hydroquinone yield is greater than 85%, the catalyst can be reused. The method reduces the amount of recoverable substantially the catalyst, significantly reducing costs; and enhance the catalytic efficiency and uniformity of the reaction by using homogeneous catalysts accelerate the reaction under acidic conditions, shorten production time; facilitate separation of catalyst and product, the catalyst It can be recycled, the economic environment, easy to operate.