Method for producing oxydol by dihydrodiketoanthracene method

Abstract

The invention discloses an anthraquinone preparation method for producing hydrogen peroxide, which is characterized in that the catalyst palladium is put into the hydrogenation tower to activate hydrogen; the hydrogen replacement with nitrogen is performed and then the prepared operating fluid is sent to the hydrogenation tower. Under the catalysis of the palladium, the hydrogenation takes place with hydrogen and the corresponding hydrogenated fluid is obtained. Then the hydrogenated fluid is sent to the oxidation tower, and oxidation takes place; the oxidized fluid is counter-flow extracted with pure water and the hydrogen peroxide is obtained. After the purification, the finished product is obtained and the disposed extraction raffinate can be calculatedly as operating fluid with a characteristic of quenching and softening the catalyst palladium. The invention has the advantages that the degradation of anthraquinone caused by the high activity of the catalyst palladium at the beginning of the process effectively is reduced; the activity of the catalyst is made full use, and the stability for the system is increased.

Description

Technical field: [0001] The invention relates to a method for producing hydrogen peroxide, in particular to a method for producing hydrogen peroxide by an anthraquinone method. Background technique: [0002] The production of hydrogen peroxide by anthraquinone method is one of the most mature production methods in the world at present. The hydrogenation catalysts used in the production of hydrogen peroxide by anthraquinone method are basically palladium-based catalysts, including fixed-bed catalysts and suspended-bed catalysts. After the catalyst is passed through the working solution (diethylanthraquinone is used as the carrier, and the aromatic hydrocarbon and trioctyl phosphate are used as the solvent to prepare the working solution), the working solution is immersed in the catalyst, and the anthraquinone dissolved in the working solution is also After entering the catalyst, inside the catalyst, the internal diffusion resistance of anthraquinone is very large, and the cat...

AI Technical Summary

Problems solved by technology

After the catalyst is passed through the working solution (diethylanthraquinone is used as the carrier, and the aromatic hydrocarbon and trioctyl phosphate are used as the solvent to prepare the working solution), the working solution is immersed in the catalyst, and the anthraquinone dissolved in the working solution is also After entering the catalyst, inside the catalyst, the internal diffusion resistance of anthraquinone is very large, and the catalyst has just been activated by hydrogen at this time, and the activity is very high, which can easily cause excessive hydrogenation of anthraquinone, thereby producing a large amount of degradation products, making the system Unstable operation also increases the consumption of anthraquinone