A slurry bed loop reactor and its application and method for producing hydrogen peroxide

Abstract

The invention relates to a slurry bed loop reactor, application and a method for producing hydrogen peroxide. The slurry bed loop reactor comprises a riser, a separation tank and a downcomer which are communicated sequentially, wherein an expansion section with expanded pipe diameter is arranged at the upper part of the riser, the upper part of the expansion section is communicated with the separation tank, a liquid phase outlet in the upper part of the separation tank is communicated with the upper part of the downcomer, the bottom of the downcomer is communicated with the bottom of the riser, and the bottom of the separation tank is communicated with the lower part of the downcomer; and a raw material inlet is formed in the bottom of the riser, gas outlets are formed in the top of the expansion section of the riser and in the top of the separation tank, a filtration component is arranged in the downcomer and a clear liquid outlet is formed in the upper part of the downcomer via the filtration component. According to a hydrogenation method for producing hydrogen peroxide by an anthraquinone method with the adoption of the slurry bed loop reactor, the gas-liquid-solid three-phase separation efficiency is high, the excess local liquid holdup of a catalyst is avoided, the possibility of excessive hydrogenation is reduced, the hydrogenation efficiency is further effectively improved and a hydrogen peroxide product with relatively high concentration can be obtained.

Description

technical field [0001] The present invention relates to a slurry bed loop reactor and its application method, more specifically, to a slurry bed reactor suitable for the hydrogenation process in the process of producing hydrogen peroxide by anthraquinone method and a method for producing hydrogen peroxide Methods. Background technique [0002] Hydrogen peroxide is an important inorganic chemical raw material, which is widely used in papermaking, textile, chemical synthesis, military industry, electronics, food processing, medicine, cosmetics, environmental protection, metallurgy and many other fields. Hydrogen peroxide decomposes to produce water and oxygen, which has no secondary pollution to the environment and is a green chemical. At present, the anthraquinone method is widely used in the production of hydrogen peroxide at home and abroad. The anthraquinone method to produce hydrogen peroxide uses anthraquinone derivatives as the working carrier. Under the action of a c...

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Problems solved by technology

At present, the most commonly used in the anthraquinone hydrogenation process in China is the downflow fixed bed reactor, that is, the trickle bed reactor, but the fixed bed reactor has low catalyst utilization efficiency, low reaction selectivity, uneven temperature distribution in the bed, The problem of large local liquid holding capacity of the catalyst and serious degradation of the working fluid

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