Catalyst for producing benzenediol by oxygenizing phenyl hydrate with hydrogen peroxide at room temperature and preparation method thereof

Abstract

The invention relates to a catalyst for oxidizing phenol by hydrogen peroxide at room temperature to prepare benzenediol, and the preparation method of the benzenediol. The structural formula of the catalyst is AmBnFexSiOy, wherein A is one of the elements of the III main group in the periodic table, and B is one of the transition metal elements. A certain amount of inorganic metallic ferric saltand a precursor containing A and / or B are dissolved in a water solution, the solution is added to a water solution containing a surface active agent and a silicon source; after the solution is stirred, water solution of tetramethyl ammonium hydroxide is added, and then, sol is obtained by regulating the pH value; and the sol is centrifugated, washed and dried after being aged at room temperature or under the hydrothermal condition, and then, the surface active agent is removed to obtain the catalyst. The invention also relates to the preparation method of the benzenediol, which is characterized in that the catalyst is adopted, and the phenol is directly oxidized by the hydrogen peroxide at room temperature to prepare the benzenediol. The invention overcomes the disadvantages of high energy consumption, heavy machine utilization and the like under the conditions of high temperature and high pressure in the prior art of synthesizing benzenediol.

Description

Technical field [0001] The invention relates to a catalyst for preparing hydroquinone by oxidizing phenol with hydrogen peroxide and a preparation method thereof, in particular to a structural formula A m B n Fe x SiO y The catalyst used for the room temperature oxidation of phenol with hydrogen peroxide to prepare diphenol and its preparation method; the invention also relates to the application of the above catalyst in the room temperature oxidation of phenol with hydrogen peroxide to prepare diphenol. Background technique [0002] Hydroquinone (catechol and hydroquinone) is an important organic intermediate, which is widely used in perfume, dye, medicine, pesticide, rubber, coating and photography industries. Traditional hydroquinone synthesis methods include aniline oxidation and p-dicumene oxidation. Catechol is mainly obtained by hydrolysis of o-chlorophenol or o-methoxyphenol. These preparation methods have the disadvantages of multiple reaction steps, complex process flow...

AI Technical Summary

Problems solved by technology

However, these catalysts require the reaction to be carried out under high temperature and high pressure, the conditions are relatively harsh and the requirements for the reactor are relatively high.