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Tower-type enhanced oxidation system and method for preparing hydrogen peroxide

A hydrogen peroxide and tower-type technology, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the problem of insufficient mixing and oxygen utilization Low yield, low product yield and other problems, to achieve the effect of easy operation, improved application area, and high purity

Pending Publication Date: 2021-10-08
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Abstract
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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 tower-type enhanced oxidation system for preparing hydrogen peroxide. The tower-type enhanced oxidation system is equipped with a mixed micro-interface unit inside the oxidation tower, so that the air is broken before the oxidation reaction between the air and hydrogenated anthraquinone 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 due to the inability to fully mix air and hydrogenated anthraquinone inside the oxidation tower. low problem

Method used

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  • Tower-type enhanced oxidation system and method for preparing hydrogen peroxide

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Embodiment

[0047] refer to figure 1 As shown, it is a tower-type enhanced oxidation system for preparing hydrogen peroxide according to an embodiment of the present invention, which mainly includes an oxidation tower 1, and multiple groups of mixed micro-interface generator units 13 arranged inside the oxidation tower 1. In the oxidation tower 1, mainly Hydrogenated anthraquinone reacts with air to produce hydrogen peroxide. In order to improve the oxidation effect, a multi-layer grid 15 is arranged in the oxidation tower 1, and a downcomer 14 for drainage is arranged on the inner wall.

[0048] This embodiment is two groups of mixed micro-interface generator sets 13, the mixed micro-interface generator sets 13 are arranged sequentially from top to bottom, and each set of mixed micro-interface generator sets 13 includes an upper-mounted micro-interface generating set connected as a whole. device 131 and a lower-mounted micro-interface generator 132, a gas-liquid emulsion channel 133 is a...

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 tower 1 is 0.25 MPa. Analysis results: the conversion rate of hydrogenated anthraquinone is 97%, and the utilization rate of oxygen is 97%.

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 tower 1 is 0.35 MPa. Analysis results: the conversion rate of hydrogenated anthraquinone is 97%, and the utilization rate of oxygen is 97%.

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Abstract

The invention provides a tower-type enhanced oxidation system and method for preparing hydrogen peroxide. The tower-type enhanced oxidation system comprises an oxidation tower, wherein a liquid phase pipeline for conveying hydrogenated anthraquinone and a gas phase pipeline for conveying oxygen are arranged on the side surface of the oxidation tower; a plurality of groups of mixed micro-interface generator units are arranged in the oxidation tower, and the mixed micro-interface generator units are sequentially arranged from top to bottom; and each mixed micro-interface generator unit comprises an upper micro-interface generator and a lower micro-interface generator which are connected into a whole, a gas-liquid emulsion channel is arranged between the upper micro-interface generator and the lower micro-interface generator, the gas-liquid emulsion channel is connected with a gas-liquid emulsion outlet, and the gas-liquid emulsion outlet is tightly attached to the upper side wall of the lower micro-interface generator. By adopting the tower-type enhanced oxidation system, the utilization rate of oxygen can be increased, the yield of products can be increased, and the whole system is highly integrated, small in occupied area and simple and convenient to operate.

Description

technical field [0001] The invention relates to the field of hydrogen peroxide preparation, in particular to a tower-type enhanced oxidation system and 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 strong. [0...

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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