Method for producing oxydol by anthraquinone method

Abstract

The invention discloses a method for producing hydrogen peroxide by an anthraquinone method. The process step is to put a palladium catalyst in a hydrogenation tower to activate hydrogen, and then carry out nitrogen replacement. Under the catalytic action of the catalyst, hydrogenation reaction with hydrogen is carried out to obtain the corresponding hydrogenated liquid, and then the hydrogenated liquid is passed into the oxidation tower. After the purification treatment, the finished product is made, and the raffinate is recycled as a working fluid after treatment. It is characterized in that the palladium catalyst is subjected to quenching and softening treatment. The anthraquinone degradation caused by the catalyst can give full play to the activity of the catalyst and increase the stability of the system operation.

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...

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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

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