Hydrogenation method for production of hydrogen peroxide by anthraquinone process

A technology of hydrogen peroxide and anthraquinone method, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve catalytic hydrogenation process Low efficiency, low contact efficiency, large equipment volume, etc., to avoid selectivity reduction, reduce equipment volume, and large contact area

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

AI Technical Summary

Problems solved by technology

The problem of this method is that the contact efficiency of the gas phase, liquid phase and solid phase in the reactor is low, the efficiency of the catalytic hydrogenation process is low, and the material needs to stay in the equipment for a long time, resulting in large equipment volume and low selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, m-trimethylbenzene and trioctyl phosphate are mixed to prepare a solution, wherein the volume fraction of trioctyl phosphate is 25% to obtain a solvent, and 2-ethylanthraquinone is mixed with the solvent as a solute to prepare a solution to obtain a working solution, Wherein the concentration of 2-ethylanthraquinone is 0.01mol / L. At a temperature of 30°C and a pressure of 500kPa (gauge pressure), a mixed gas of 0.01mol of hydrogen and nitrogen is passed into 40mL of the working fluid with a microporous membrane as the dispersion medium until the average diameter of the bubbles is 10 micron gas-liquid mixed fluid, wherein the volume fraction of hydrogen is 80%. Then, under the condition that the temperature is 30°C and the pressure is 500kPa (gauge pressure), make the gas-liquid mixed fluid flow for 400h -1 The space velocity of the palladium-α-Al 2 o 3 The resulting tubular reactor is filled to obtain a reacted gas-liquid mixed fluid. Finally, in the gas-liqu...

Embodiment 2

[0024] Firstly, a solution is prepared by mixing o-trimethylbenzene and trioctyl phosphate, wherein the volume fraction of trioctyl phosphate is 30% to obtain a solvent, and tetrahydro 2-ethylanthraquinone is mixed with the solvent as a solute to prepare a solution to obtain working Liquid, wherein the concentration of tetrahydro 2-ethylanthraquinone is 0.1mol / L. At a temperature of 40°C and a pressure of 500kPa (gauge pressure), a mixed gas of 0.02mol of hydrogen and nitrogen is passed into 20mL of working liquid with a microporous membrane as the dispersion medium until the average diameter of the bubbles is 100 micron gas-liquid mixed fluid, wherein the volume fraction of hydrogen is 75%. Then, under the condition that the temperature is 40°C and the pressure is 500kPa (gauge pressure), the gas-liquid mixed fluid is allowed to flow for 500h -1 The space velocity of the palladium-α-Al 2 o 3 The resulting tubular reactor is filled to obtain a reacted gas-liquid mixed fluid...

Embodiment 3

[0027] First, a solution is prepared by mixing p-trimethylbenzene and diisobutylmethanol, wherein the volume fraction of diisobutylmethanol is 27%, to obtain a solvent, and 2-ethylanthraquinone and tetrahydro-2-ethylanthraquinone are used as solutes Mix with a solvent to prepare a solution to obtain a working solution, wherein the concentration of 2-ethylanthraquinone is 0.2 mol / L, and the concentration of tetrahydro 2-ethylanthraquinone is 0.1 mol / L. At a temperature of 50°C and a pressure of 0 (gauge pressure), the mixed gas of hydrogen and nitrogen with a total amount of 0.05mol is passed into 100mL of the working fluid with a microporous sieve plate as the dispersion medium, until the average diameter of the bubbles reaches It is a 200 micron gas-liquid mixed fluid, in which the volume fraction of hydrogen is 60%. Then, under the condition that the temperature is 50°C and the pressure is 0 (gauge pressure), make the gas-liquid mixed fluid flow for 700h -1 The space veloci...

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Abstract

The invention discloses a hydrogenation method for production of hydrogen peroxide by the anthraquinone process, belonging to the technical field of chemical industry reaction. The method provided by the invention comprises: dispersing the gaseous phase containing hydrogen into the working solution containing the anthraquinone derivatives to obtain the gas-liquid mixing fluid containing micron bubbles, so that the gas-liquid mixing fluid passes through the pipe reactor filled with the hydrogenation catalyst at the space velocity of 3 to 1000h<-1> to finish the hydrogenation process. In the method provided by the invention, the gas-liquid micro-dispersing process and the static bed catalytic hydrogenation process are directly integrated, so that the interphase mass transfer is strengthened, and the contacts between different reactants and between the reactant and the catalyst are more sufficient and more uniform, thereby enhancing the efficiency and the controllability of the hydrogenation process and improving the economical efficiency and the security of the production of the hydrogen peroxide.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction, and in particular relates to a hydrogenation 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. The anthraquinone method is 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 catalytic hydrogenation process of the working solution containing 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 anthr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/023
Inventor 谭璟骆广生吕阳成
Owner TSINGHUA UNIV
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