Hydrogenation system for producing hydrogen peroxide

Abstract

The invention discloses a hydrogenation system for producing hydrogen peroxide in the field of chemical equipment. The hydrogenation system comprises a hydrogen filter, a working solution pre-heater, a hydrogenating tower, a hydride gas-liquid separator, a hydride filter, a hydride regenerative bed and a hydride storage tank, wherein the hydrogenating tower is divided into an upper tower and a lower tower; the outlet of the upper tower is connected with the inlet at the top of the lower tower; a hydride cooler is also arranged between the upper tower and the lower tower; and the inlet of the hydride cooler is connected with the outlet at the bottom of the upper tower, and the outlet of the hydride cooler is connected with the inlet at the top of the lower tower. When the system works, working solution and raw material hydrogen enter the upper tower for hydrogenation reaction; one part of the product can enter the lower tower and the other part of the product can enter the hydride cooler for cooling; the cooled product enter the lower tower to continue to undergo hydrogenation reaction; and a palladium catalyst can work in a state of high activity for a long time and the components of the working solution in the system can be ensured stable by adjusting the hydrogenation temperature in the lower tower. The hydrogenation system is particularly used for producing the hydrogen peroxide.

Description

technical field [0001] The invention relates to a production equipment of hydrogen peroxide, in particular to the production equipment of the hydrogenation process in the production of hydrogen peroxide by anthraquinone method. Background technique [0002] At present, the main production process of hydrogen peroxide is the anthraquinone method. After a lot of research and improvement by companies from various countries, this method has become an absolutely dominant method for the production of hydrogen peroxide in the world, almost completely replacing the electrolysis method. The method uses anthraquinone derivatives (mainly 2-alkylanthraquinone) as a catalyst carrier, and in the presence of a catalyst, hydrogenates 2-alkylanthraquinone (AQ) dissolved in a suitable organic solvent to generate the corresponding 2-Alkylhydroanthraquinones (HAQ). After the HAQ in the solvent is separated from the catalyst, it can be oxidized with air or oxygen-enriched gas to generate H2O2, ...

AI Technical Summary

Problems solved by technology

The deficiencies of the prior art are: (1) the temperature in the hydrogenation tower is difficult to control, and the hydrogenation temperature increases with the aging of the catalyst, thereby accelerating the aging of the catalyst; when the operating temperature of the catalyst is high, the service life of the catalyst is short; at the same time, (2) Anthraquinone degradation polymers and metal salts have a common tendency to coalesce in the catalyst layer, resulting in a short regeneration cycle; (3) Anthraquinone is easy to be deeply hydrogenated; (4) The composition of the system working fluid poor stability

In addition, the hydrogenated liquid gas-liquid separator is set separately from the hydrogenation tower, resulting in complicated pipelines and increased costs

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