Continuous hydrogenation process

C - Chemistry – Metallurgy – 01 – B

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C01B 15/023 (2006.01) B01J 8/22 (2006.01) C07B 35/02 (2006.01) B01J 23/44 (2006.01)

Patent

CA 2502715

In the continuous hydrogenation of a working solution containing a hydrogenable compound with hydrogen in the presence of a heterogeneous catalyst, at least part of the hydrogen-containing waste hydrogenation gas is recycled into the hydrogenation reactor after compression. According to the invention, a jet pump is used for the compression of the waste hydrogenation gas and a liquid or gaseous feedstock of the hydrogenation process is used as the motive agent. Preferred motive agents are the hydrogenation gas or a working solution recycled into the process. The process is particularly suitable for performing the hydrogenation step in the anthraquinone process for the production of hydrogen peroxide.

Au cours de l'hydrogénation continue d'une solution active contenant un composé hydrogénable avec de l'hydrogène en la présence d'un catalyseur hétérogène, au moins une partie du gaz d'hydrogénation contenant de l'hydrogène produit est recyclée dans le réacteur d'hydrogénation après compression. Selon l'invention, une pompe à jet est utilisée pour comprimer le gaz d'hydrogénation produit et une charge d'alimentation liquide ou gazeuse intervenant dans le processus d'hydrogénation, est utilisée comment agent moteur. Les agents moteurs préférés sont le gaz d'hydrogénation ou une solution active recyclée au cours du processus. Le procédé convient en particulier à la mise en oeuvre de l'étape d'hydrogénation du processus à l'anthraquinone qui sert à produire du peroxyde d'hydrogène.

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