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

An oxidation system, hydrogen peroxide technology, applied in the directions of peroxide/peroxyhydrate/peroxyacid/superoxide/ozone, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of low product yield and inability to obtain Insufficient mixing, low oxygen utilization, etc.

Pending Publication Date: 2021-09-14
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to provide a micro-interface oxidation system for preparing hydrogen peroxide. The micro-interface oxidation system can break the air into Micro-bubbles increase the mass transfer area of ​​the phase boundary between air and hydrogenated anthraquinone, thereby solving the problem of low oxygen utilization rate and low product yield in the prior art because air and hydrogenated anthraquinone cannot be fully mixed inside the oxidation reaction tower. low problem

Method used

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

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Embodiment

[0047] refer to figure 1 As shown, it is a micro-interface 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, mainly hydrogenated anthracene The oxidation reaction between quinone and air produces hydrogen peroxide. In order to improve the oxidation effect, grids 14 are arranged on both sides of the gas-liquid emulsion channel to improve the reaction effect, and the grids 14 are arranged symmetrically on the left and right.

[0048] 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 is connected with a gas-liquid emulsion ...

Embodiment 2

[0060] 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%, and the utilization rate of oxygen is 96%.

Embodiment 3

[0062] 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%, and the utilization rate of oxygen is 96%.

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Abstract

The invention provides a micro-interface oxidation system for preparing hydrogen peroxide and an oxidation method thereof. The micro-interface oxidation system comprises an oxidation reaction tower; a liquid phase pipeline for conveying hydrogenated anthraquinone and a gas phase pipeline for conveying air are arranged on the side surface of the oxidation reaction tower; a mixed micro-interface unit is arranged in the oxidation reaction tower, the mixed micro-interface unit comprises an upper micro-interface generator and a lower micro-interface generator which are communicated up and down, and a long and narrow gas-liquid emulsion channel is arranged between the upper micro-interface generator and the lower micro-interface generator; and the gas-liquid emulsion channel is connected with a gas-liquid emulsion outlet, the gas-liquid emulsion outlet clings to the upper side wall of the lower micro-interface generator, and the top of the upper micro-interface generator is provided with an entrainment pipe for entrainment of air at the top in the tower. By adopting the micro-interface oxidation system, the utilization rate of oxygen can be increased, the occupied area is small, and the 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 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 demand is stro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/023
CPCC01B15/023
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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