Slurry bed loop reactor, application and method for producing hydrogen peroxide

A loop reactor, reactor technology, applied in chemical instruments and methods, peroxides/peroxyhydrates/peroxyacids/superoxides/ozone oxides, inorganic chemistry, etc., can solve the temperature distribution in the bed Uneven, low catalyst utilization efficiency, large catalyst liquid holding capacity, etc., to achieve uniform concentration and temperature distribution, avoid excessive liquid holding capacity, and eliminate the effect of flow dead zone

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Slurry bed loop reactor, application and method for producing hydrogen peroxide
  • Slurry bed loop reactor, application and method for producing hydrogen peroxide

Examples

Experimental program
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specific Embodiment approach

[0024] The slurry bed circulation reactor provided by the present invention is composed of a riser, a separation tank and a downcomer which are connected in sequence. The upper part of the riser is an enlarged section with enlarged pipe diameter. The liquid phase outlet is connected to the upper part of the downcomer, the bottom of the downcomer is connected to the bottom of the riser, and the bottom of the separation tank is connected to the lower part of the downcomer; the bottom of the riser is provided with a raw material inlet, and the top of the enlarged section of the riser and the top of the separation tank are provided with a gas outlet , the filter assembly is arranged in the downcomer, and the upper part of the downcomer is provided with a clear liquid outlet through the filter assembly.

[0025]Preferably, internal components are arranged in the separation tank. The internal member is preferably an overflow sleeve or an overflow baffle. The overflow sleeve inside ...

Embodiment 1

[0061] Example 1 illustrates the effect of the slurry bed reactor provided by the present invention applied to the preparation of hydrogen peroxide by anthraquinone method.

[0062] Attached figure 1 The slurry bed reactor shown, wherein: the diameter ratio of the expansion section to the riser is 3:1, the height ratio of the expansion section to the riser is: 1:3; the diameter ratio of the riser to the downcomer is 4:1, The diameter ratio of the riser tube to the inner cylinder in the expansion section is 1.2:1, the outer cylinder is a two-stage structure with the upper part larger than the lower part, the diameter ratio of the upper part to the lower part is 2:1, and the diameter ratio of the upper part of the outer tube to the inner tube is 3:1, the demister is a circular plate, 30mm away from the top of the inner cylinder, the ratio of the diameter of the demister to the diameter of the inner cylinder is 2.5:1, the length of the inner cylinder extending into the riser unde...

Embodiment 2

[0070] Example 2 illustrates the effect of the slurry bed reactor provided by the present invention applied to the preparation of hydrogen peroxide by anthraquinone method.

[0071] Attached figure 2 The slurry bed reactor shown is different from Example 1 in that the hydrogen-containing gas and the working fluid enter the bottom of the riser from the independent gas distributor and liquid distributor respectively, and in the sleeve structure in the riser, the outer cylinder is A cylinder with a uniform diameter, the diameter of the inner cylinder is the same as the lower part of the riser, the diameter ratio of the outer cylinder to the inner cylinder is 3.5:1, the demister is a conical plate, the bottom of the demister is 50mm from the top of the inner cylinder, and the demister The ratio of the diameter of the device to the diameter of the inner cylinder is 3:1, and there are 8 round holes with a diameter of 3 mm at the connection between the bottom of the inner cylinder a...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/20C01B15/023
CPCB01J8/20B01J2208/00796B01J2208/00805C01B15/023
Inventor 朱振兴侯栓弟郑博唐晓津胡立峰吕庐峰李学锋
Owner CHINA PETROLEUM & CHEM CORP
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