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Micro-interface enhanced oxidation system and method for preparing hydrogen peroxide

A hydrogen peroxide and interface technology, applied in peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of low oxygen utilization rate, air and hydrogenation Anthraquinone cannot be fully mixed, the product yield is low, etc., to achieve the effect of simple operation, improved application area, and high purity

Active Publication Date: 2021-10-08
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The first purpose of the present invention is to provide a micro-interface enhanced oxidation system for the preparation of hydrogen peroxide, the micro-interface enhanced oxidation system by setting a mixed micro-interface inside the oxidation reaction tower The unit makes the air broken into microbubbles before the oxidation reaction between the air and the hydrogenated anthraquinone, and increases the mass transfer area of ​​the phase boundary between the air and the hydrogenated anthraquinone, thus solving the problem in the prior art due to the oxidation of the air and the hydrogenated anthraquinone The interior of the reaction tower cannot be fully mixed, resulting in low oxygen utilization and low product yield

Method used

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  • Micro-interface enhanced oxidation system and method for preparing hydrogen peroxide

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Embodiment

[0055] refer to figure 1 As shown, it is a micro-interface enhanced oxidation system for preparing hydrogen peroxide according to an embodiment of the present invention, which mainly includes an oxidation reaction tower 1 and a mixed micro-interface unit 13 arranged inside the oxidation reaction tower 1. In the oxidation reaction tower 1, hydrogenation is mainly carried out. Anthraquinone undergoes an oxidation reaction with air to produce hydrogen peroxide. In order to improve the oxidation effect, grids 14 are arranged on both sides of the inner wall of the oxidation reaction tower to improve the reaction effect, and the grids 14 are arranged symmetrically on the left and right.

[0056] The hybrid micro-interface unit 13 of this embodiment includes an upper-mounted micro-interface generator 131 and a lower-mounted micro-interface generator 132 that are connected up and down. A gas-liquid emulsion channel 133 is arranged between them, and the gas-liquid emulsion channel 133 ...

Embodiment 2

[0071] Other operating steps are consistent with Example 1, except that the oxidation heating constant temperature is 45° C., and the reaction pressure of oxidation reaction tower 1 is 0.25 MPa. Analysis results: the conversion rate of hydrogenated anthraquinone is 96.5%, and the utilization rate of oxygen is 96.5%.

Embodiment 3

[0073] Other operating steps are consistent with Example 1, except that the oxidation heating constant temperature is 55° C., and the reaction pressure of oxidation reaction tower 1 is 0.35 MPa. Analysis results: the conversion rate of hydrogenated anthraquinone is 96.5%, and the utilization rate of oxygen is 96.5%.

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Abstract

The invention provides a micro-interface enhanced oxidation system and method for preparing hydrogen peroxide. The micro-interface enhanced oxidation system comprises an oxidation reaction tower, wherein a liquid phase pipeline for conveying hydrogenated anthraquinone is arranged at the top of the side surface of the oxidation reaction tower, and a gas phase pipeline for conveying air is arranged at the bottom of the side surface of the oxidation reaction tower; a liquid distributor, a filler section, a liquid receiving disc and a mixed micro-interface unit are sequentially arranged in the oxidation reaction tower from top to bottom; and the mixed micro-interface unit comprises an upper micro-interface generator and a lower micro-interface generator which communicate with each other along a vertical direction, hydroanthraquinone is conveyed into the mixed micro-interface unit, is distributed by the liquid distributor, sequentially descends and then is mixed, dispersed and crushed with air in the mixed micro-interface unit. By adopting the micro-interface enhanced oxidation system, the utilization rate of oxygen can be increased, an occupied area is small, and operation is simple and convenient.

Description

technical field [0001] The invention relates to the field of hydrogen peroxide preparation, in particular to a micro-interface enhanced oxidation system and an oxidation method for preparing hydrogen peroxide. Background technique [0002] Hydrogen peroxide is hydrogen peroxide (H 2 o 2 ) aqueous solution is an important inorganic peroxide, which has the characteristics of oxidation, bleaching and environmental protection during use, and can be applied to fabrics, pulp decolorization, chemical synthesis, wastewater treatment, medical treatment, metallurgy, military industry, food processing And other fields, act as oxidizing agent, bleaching agent, disinfectant, polymer initiator and crosslinking agent, propellant, etc. With the increasingly stringent environmental protection regulations, the production capacity of propylene oxide, green caprolactam and other products by hydrogen peroxide direct oxidation (HPPO method) has increased, resulting in H 2 o 2 The market deman...

Claims

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Application Information

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IPC IPC(8): C01B15/023B01J8/00
CPCC01B15/023B01J8/008
Inventor 张志炳孟为民周政王宝荣杨高东罗华勋张锋李磊杨国强田洪舟曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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