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Device and method for synthesizing high-purity hydrogen peroxide continuously at room temperature

A pure hydrogen peroxide, hydrogen peroxide technology, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozone, inorganic chemistry, etc., can solve the problem of increasing explosion, Problems such as low yield of hydrogen peroxide and low utilization rate of hydrogen, to achieve the effect of easy operation and simple device

Active Publication Date: 2015-01-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention has the disadvantages of the following three aspects: firstly, the high-voltage electrode and the ground electrode adopted are all metals covered with a medium on the surface, which is easy to generate local strong discharge, and there is a danger of explosion when the oxygen concentration is higher than 6mol%. , the oxygen concentration in the raw material of the hydrogen-oxygen mixture must be controlled within the range of 0.3-3mo%, resulting in low yield and low energy efficiency for the synthesis of hydrogen peroxide
However, this method also has the following disadvantages: due to the air gap between the metal rod of the high-voltage electrode and the hard glass sleeve, brighter strong discharge channels often appear in the hydrogen-oxygen dielectric barrier discharge plasma, which increases the risk of explosion. Risk, so the oxygen concentration in the hydrogen-oxygen mixture raw material must be lower than 6mol%, resulting in low utilization of raw material hydrogen
However, in this method, the electrolyte solution of the high-voltage electrode has evaporation problems during the discharge reaction process, and intermittent replenishment of the electrolyte solution is required, which increases the safety risk and difficulty of use of the device, and cannot achieve continuous operation

Method used

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  • Device and method for synthesizing high-purity hydrogen peroxide continuously at room temperature
  • Device and method for synthesizing high-purity hydrogen peroxide continuously at room temperature

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Build a synthesis device

[0045] 1. Make high voltage electrodes.

[0046] The high-voltage electrode is a hard glass tube with an outer diameter of 4mm. The tube is filled with metal iron powder. Metal powder diameter size 150 microns. Metal powders require dense packing. The method of dense filling is to vibrate while filling to eliminate the air gap in the tube.

[0047] 2. A plasma discharge reaction device is composed of the above-mentioned high-voltage electrodes.

[0048] In this dielectric barrier discharge reaction device, the discharge reaction tube is made of hard glass, and its axis position is used to fix the above-mentioned high-voltage electrode; the outer cylindrical shell is made of polytetrafluoroethylene, and its axis position is used to Fix the above-mentioned discharge reaction tube, the reaction tube and the cylindrical shell are sealed as a whole; fill the annular gap between the shell and the reaction tube with circulating water, which i...

Embodiment 2

[0060] Example 1 was repeated, using 150 micron metal copper powder as the central high-voltage electrode material, and experiments were performed with discharge times of 2 hours, 4 hours, 6 hours, and 10 hours, respectively. The result is as follows:

[0061] Discharge for 2 hours, the volume of the collected hydrogen peroxide solution is 0.5 ml, and the concentration of hydrogen peroxide is 44wt%

[0062] Discharge for 4 hours, the volume of the collected hydrogen peroxide solution is 0.96 ml, and the concentration of hydrogen peroxide is 44wt%

[0063] Discharge for 6 hours, the volume of the collected hydrogen peroxide solution is 1.45 milliliters, and the concentration of hydrogen peroxide is 44wt%.

[0064] Discharge for 10 hours, the volume of the collected hydrogen peroxide solution is 2.42 milliliters, and the concentration of hydrogen peroxide is 44wt%

Embodiment 3

[0066] Example 2 was repeated, using 150 micron metal aluminum powder as the central high-voltage electrode material, and experiments were performed with discharge times of 2 hours, 4 hours, 6 hours, and 10 hours, respectively. The result is as follows:

[0067] Discharge for 2 hours, the volume of the collected hydrogen peroxide solution is 0.49 ml, and the concentration of hydrogen peroxide is 48wt%

[0068] Discharge for 4 hours, the volume of the collected hydrogen peroxide solution is 0.96 ml, and the concentration of hydrogen peroxide is 48wt%.

[0069] Discharge for 6 hours, the volume of hydrogen peroxide solution collected is 1.42 ml, and the concentration of hydrogen peroxide is 48wt%

[0070] Discharge for 10 hours, the volume of hydrogen peroxide solution collected is 2.44 milliliters, and the concentration of hydrogen peroxide is 48wt%.

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Abstract

The invention belongs to the technical field of plasma synthetic chemicals, and relates to device and a method for continuously synthesizing high-concentration and high-purity hydrogen peroxide at a room temperature and in a gas phase with a hydrogen and oxygen mixture. A main body of the device is made of polytetrafluoroethylene; a discharge reaction tube is made of hard glass; a grounding electrode is a circulating water electrode; a high voltage electrode is a hard glass slim tube filled with metal fines; and a discharge power supply is an alternating current high-voltage power supply. The hydrogen and oxygen mixture containing 6-20mol% of oxygen flows in the discharge reaction tube from the top down, and discharge conversion is resisted by a weak medium. The invention provides a quick method for producing high-concentration and high-purity hydrogen peroxide in a small batch.

Description

technical field [0001] The invention belongs to the technical field of plasma synthesis chemicals, and relates to a device and a method for continuously generating high-concentration and high-purity hydrogen peroxide in a gas phase at room temperature by using hydrogen-oxygen mixed gas. Background technique [0002] As the most important green oxidizing agent, hydrogen peroxide is widely used in the fields of papermaking, textile, electronics, medical treatment, aerospace, and chemical synthesis. Among them, high-concentration or / and high-purity hydrogen peroxide has important uses in the fields of chemical synthesis (such as propylene oxide), electronics industry and aerospace. [0003] At present, hydrogen peroxide is mainly produced by the anthraquinone method, and the world's annual output has reached several million tons (100wt%). Although the process of anthraquinone method is mature, due to the use of precious metal palladium as an anthraquinone hydrogenation catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B15/029
Inventor 郭洪臣易颜辉
Owner DALIAN UNIV OF TECH