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Slurry bed reactor and application of slurry bed reactor in producing hydrogen peroxide

A technology of reactor and slurry bed, which is applied in the field of chemical engineering, can solve the problems of working fluid degradation, large catalyst liquid holding capacity, and low reaction selectivity, and achieve the effects of uniform flow, improved mass transfer performance, and improved hydrogenation efficiency

Active Publication Date: 2015-11-18
HUNAN BAILI ENGINEERING SCIENCE AND TECHNOLOGY CO LTD
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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 reactor and application of slurry bed reactor in producing hydrogen peroxide

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Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 The slurry bed reactor shown comprises riser 1, expansion section 2, cooler 5, catalyst settler 3, filter 4; the expansion section is connected to the top of the riser, and the riser part extends into the expansion section. The riser in the expansion section is provided with a slurry return port 19, which communicates with the reaction chamber 8; the bottom of the riser is connected with the cooler 5, and the cooler and the riser are integrated; the upper part of the expansion section is a gas-liquid separation chamber 9, and the top A reaction gas outlet 10 is provided, and the middle and lower part of the expansion section is a catalyst pre-sedimentation area, and a baffle plate 20 is provided in the catalyst pre-sedimentation area to form a baffle isolation area. Catalyst settler 3 is connected by tangential feed pipe 21; Catalyst settler is fed from the middle by tangential mode, and catalyst settler top is provided with grille 22, and the top of c...

Embodiment 2

[0042] Hydrogen efficiency determination method: take 5mL of hydrogenated liquid in a separatory funnel, then add 10mL of heavy aromatics and 20mL of H 2 SO 4 Solution (H 2 SO 4 The volume ratio of water and water is 1:4); pass O into the above mixed solution 2 , bubbling and oxidizing until bright yellow or orange (about 10-15min); wash the extraction reaction solution with pure water 4-5 times, about 20mL of water each time; add KMnO with a concentration of 0.1mol / L to the extraction solution 4 The standard solution is titrated to reddish, and the color does not fade in 30s as the end point. Then the hydrogen effect (gH 2 o 2 / L) = standard solution concentration (0.1mol / L) x standard solution volume (mL) x 17.01 / 5.

[0043] The catalyst used is: palladium carbon catalyst Pd110 produced by Yurui Chemical Co., Ltd. The specific parameters are as follows: precious metal content 10% ± 0.2%, specific surface area ≥ 950m 2 / g, metal surface area 85 ~ 105m 2 / g, the averag...

Embodiment 3

[0046] Attached figure 1 In the slurry bed reactor shown, the size of the reaction riser is Φ100×1000mm, the size of the expansion section is Φ150×300mm, and the height from the riser to the expansion section is 150mm; the filter has two sets of sintered tubes with a height of 400mm Metal filter element filter components, set each filter component to perform automatic recoil when the pressure difference reaches 0.05MPa, and the recoil liquid is the filtered reaction clear liquid.

[0047] Working fluid feed volume is 0.3m 3 / h, the hydrogen feed rate is 5.0Nm3 / h, the reaction temperature is 50-55°C, and the reaction pressure is 0.25-0.5MPa.

[0048] The service life of the filter assembly is 60 hours, and the backwashing time is 40 seconds each time.

[0049] The hydrogenation efficiency reaches 12-14g / L hydrogenated liquid.

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Abstract

The invention discloses a slurry bed reactor. The slurry bed reactor comprises an ascension pipe, an expansion section, a cooler, a catalyst settler and a filter. The upper portion of the ascension pipe is connected with the expansion section, part of the ascension pipe extends into the expansion section, and the part, in the expansion section, of the ascension pipe is provided with a slurry return port communicated with a reaction chamber. The bottom of the ascension pipe is connected with the cooler, and the cooler and the ascension pipe are integrated. Materials are fed into the catalyst settler in a tangent mode from the middle portion, the upper portion of the catalyst settler is provided with a barrier with a certain height so as to form a standing region, the top of the catalyst settler is connected with a gas-liquid separation chamber through a balance pipe, and the bottom of the catalyst settler is connected with the cooler. The top of the filter is connected with the gas-liquid separation chamber through a balance pipe, the bottom of the filter is connected with the cooler, and the filter is provided with a back washing device. The lower portion of the ascension pipe is provided with a liquid-phase raw material inlet and a gas-liquid raw material inlet. The reaction chamber is formed in the ascension pipe, and a liquid feed distributor and a gas feed distributor are arranged at the bottom of the reaction chamber. The hydrogenation efficiency of 14-16 g / l of hydrogenated liquid is achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and in particular relates to a slurry bed reactor and its application in the production of hydrogen peroxide, in particular to a slurry bed reactor and its application in the hydrogenation process in the production of hydrogen peroxide by anthraquinone method Application in the production of hydrogen peroxide. 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 hydroge...

Claims

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Application Information

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IPC IPC(8): B01J8/22C01B15/023
Inventor 李文辉刘国强
Owner HUNAN BAILI ENGINEERING SCIENCE AND TECHNOLOGY CO LTD
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