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Oxidation method for preparing hydrogen peroxide by anthraquinone method

A technology of hydrogen peroxide and anthraquinone method, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the problem of large equipment volume, Long residence time, large bubble dispersion size, etc., to achieve the effect of large contact area, short reaction time, and reduced equipment volume

Active Publication Date: 2011-04-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the oxidation process carried out in the tower equipment, the dispersed size of the bubbles is large, the contact area of ​​the gas-liquid two-phase is small, and the distribution of the gas phase and the liquid phase is uneven, resulting in a slow oxidation process and a long residence time of the material in the equipment, which in turn causes equipment Large volume, low selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, methylnaphthalene and diisobutylmethanol are mixed to prepare a solution, wherein the volume fraction of diisobutylmethanol is 35% to obtain a solvent, and hydrogenated 2-ethylanthraquinone and hydrogenated tetrahydro 2-ethylanthraquinone are As a solute mixed with a solvent, a solution is prepared to obtain a working solution, wherein the hydrogenated 2-ethylanthraquinone concentration is 0.05 mol / L, and the hydrogenated tetrahydro 2-ethylanthraquinone concentration is 0.05 mol / L. At a temperature of 60°C and a pressure of 200kPa (gauge pressure), a total of 0.5mol of air is passed into 800mL of working fluid with a microporous membrane as the dispersion medium, and the air with an average diameter of bubbles of 200 microns- Liquid mixed fluid. Then, under the condition that the temperature is 60°C and the pressure is 200kPa (gauge pressure), the gas-liquid mixed fluid obtained is flowed and reacted in the delay pipeline at a flow rate of 2.1 m / s for 24 seconds ...

Embodiment 2

[0022] First, a solution is prepared by mixing o-trimethylbenzene and diisobutylmethanol, wherein the volume fraction of diisobutylmethanol is 32%, to obtain a solvent, and hydrogenated 2-ethylanthraquinone and hydrogenated tetrahydro 2-ethylanthraquinone As a solute mixed with a solvent, a solution is prepared to obtain a working solution, wherein the concentration of hydrogenated 2-ethylanthraquinone is 0.1 mol / L, and the concentration of hydrogenated tetrahydro 2-ethylanthraquinone is 0.4 mol / L. At a temperature of 40°C and a pressure of 300kPa (gauge pressure), a total of 0.02mol of oxygen is dispersed in 40mL of working fluid by stirring to form a gas-liquid mixed fluid with an average bubble diameter of 1000 microns. Then, at a temperature of 40°C and a pressure of 300kPa (gauge pressure), the resulting gas-liquid mixed fluid flows and reacts in the delay pipe at a flow rate of 1.2 m / s for 0.01 second to obtain the reacted gas-liquid Mix fluids. Finally, in the gas-liqu...

Embodiment 3

[0025] First, methylnaphthalene and diisobutylmethanol are mixed to prepare a solution, wherein the volume fraction of diisobutylmethanol is 31% to obtain a solvent, and hydrogenated 2-ethylanthraquinone is mixed with the solvent as a solute to prepare a solution to obtain Working solution, wherein the hydrogenated 2-ethylanthraquinone concentration is 0.3mol / L. At a temperature of 40°C and a pressure of 600kPa (gauge pressure), a mixed gas of 0.05 mol of oxygen and nitrogen is passed into 10 mL of working liquid through micron-sized channels as the dispersion medium until the average diameter of the bubbles is 1000 micron gas-liquid mixed fluid, wherein the volume fraction of oxygen is 10%. Then, at a temperature of 40°C and a pressure of 600kPa (gauge pressure), the gas-liquid mixed fluid obtained was flowed and reacted in the delay pipeline at a flow rate of 0.5 m / s for 40 seconds to obtain the reacted gas-liquid Mix fluids. Finally, in the gas-liquid phase separation dev...

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PUM

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Abstract

The invention discloses an oxidation method for preparing hydrogen peroxide by an anthraquinone method in the technical field of chemical reaction. The method comprises the following steps of: dispersing an oxygen-containing gaseous phase into hydrogenated anthraquinone derivative-containing working solution to prepare a micron-sized bubble-containing gas-liquid mixed fluid, and finishing oxidation reaction when the gas-liquid mixed fluid flows through a delay pipeline. The method can improve the oxidation efficiency of a hydrogenated anthraquinone derivative, shorten oxidation reaction time, reduce the hold-up of the oxidization working solution in a reaction system and improve the safety of the oxidation process.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction, and in particular relates to an oxidation method for producing hydrogen peroxide by an anthraquinone method. Background technique [0002] Hydrogen peroxide is an important industrial raw material, which can be widely used in chemical synthesis, environmental protection, papermaking, textile, national defense, electronics, medicine, food and agriculture, etc., as an oxidizing agent, bleaching agent, disinfectant, polymer Initiators and crosslinkers, propellants, etc. Anthraquinone derivatives are the main method for producing hydrogen peroxide in industry today, and more than 98% of the hydrogen peroxide in the world is produced by this method. The oxidation process of the working solution containing hydrogenated anthraquinone derivatives is an important step in the anthraquinone method. This process has a major impact on the economy and safety of hydrogen peroxide produced by anthraq...

Claims

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Application Information

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IPC IPC(8): C01B15/023
Inventor 谭璟骆广生吕阳成
Owner TSINGHUA UNIV
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