Continuous working type hydrogenation tower system capable of prolonging service cycle of palladium catalyst of hydrogenation tower

Abstract

The invention discloses a continuous working type hydrogenation tower system capable of prolonging the service cycle of a hydrogenation tower palladium catalyst, which comprises a hydrogenation tower consisting of three sections of hydrogenation tower units, and a working solution input pipe and a hydrogenation solution input pipe are intersected at a mixed solution input pipe; wherein a hydrogen input pipe is communicated with the top of the hydrogenation tower unit; a water vapor input pipe and an aromatic hydrocarbon mixed solvent input pipe are intersected at a regeneration input pipe; a regenerated working solution supply pipe is connected with the upper part of a working solution carclazyte bed through a two-way valve AA; a carclazyte bed filter is connected with the upper part of an aromatic solvent circulating tank; the top of a hydrogenation liquid carclazyte bed is connected with a second hydrogenation liquid branch pipe, and the other end of the second hydrogenation liquid branch pipe is connected to a hydrogenation liquid recovery pipe between a two-way valve AE and a first-stage hydrogenation liquid filter. The service life of a palladium catalyst can be prolonged, the service cycle of the palladium catalyst is prolonged, long-term continuous and stable operation is achieved, the production cost of hydrogen peroxide is reduced, economic benefits and social benefits are greatly improved, and meanwhile sewage discharge can be reduced.

Description

technical field [0001] The invention relates to a continuously working hydrogenation tower system which can prolong the service life of the hydrogenation tower palladium catalyst. Background technique [0002] Hydrogen peroxide, also known as hydrogen peroxide, is an important inorganic chemical raw material. It is mainly used in the bleaching of textiles and pulp, the synthesis of chemicals and environmental protection. It is also widely used in electronics, food and metallurgical industries. The method used by our company to produce hydrogen peroxide is the anthraquinone method, that is, the alkylanthraquinone is dissolved in an organic solvent to form a working solution, and the alkylanthraquinone is used as the working carrier, hydrogenated under the action of a palladium catalyst to make the alkylanthraquinone It is reduced to hydroanthraquinone, then oxidized with oxygen in compressed air to obtain the original alkyl anthraquinone, and hydrogen peroxide is generated at...

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Problems solved by technology

2. Incomplete palladium catalyst regeneration cannot effectively remove the impurities adsorbed on the palladium catalyst, or cannot restore the activity level of the original palladium catalyst

The traditional regeneration method is the steam method, the single use of steam has poor regeneration effect, short service life, and the degradation products adsorbed on the palladium catalyst cannot be effectively removed

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