Method for producing hydrogen peroxide

A hydrogen peroxide and manufacturing method technology, applied in chemical instruments and methods, peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the problem of cycle process capacity decline and other issues, to achieve the effect of a wide range of applications

Pending Publication Date: 2019-03-15
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of this inactive material causes the decrease of the concentration of active material anthraquinones, etc., and reduces the capacity of each process of the cycle process.

Method used

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  • Method for producing hydrogen peroxide
  • Method for producing hydrogen peroxide
  • Method for producing hydrogen peroxide

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0141] The first distillation process and the second distillation process of the present invention were carried out on a small scale, and the initial working solution and the recycled working solution were compared.

[0142]

[0143] 400 g of the working solution was placed in a 500 mL flask provided in the distillation apparatus. Distillation is carried out under reduced pressure, and the vacuum degree is always controlled at 1.3kPa. The temperature in the flask was raised from room temperature to 182°C. The distillation was continued until finally no more distillate was distilled under the conditions of 1.3 kPa, 182°C.

[0144]

[0145]The residue obtained in the first distillation step is distilled at a pressure lower than that of the first distillation step. The degree of vacuum fluctuates between 0.03kPa and 0.15kPa within a period of time from the start of distillation, and finally stabilizes at 0.08kPa. The temperature in the flask was raised from room temperatur...

example 2

[0166] The first distillation process and the second distillation process of the present invention were implemented under different conditions from Example 1, and the initial working solution and the regenerated working solution for circulation were compared.

[0167]

[0168] 351 g of the working solution was placed in a 500 mL flask provided in the distillation apparatus. Distillation is carried out under reduced pressure, and the vacuum degree is always controlled at 1.3kPa. The temperature in the flask was raised from room temperature to 157°C. The distillation was continued until finally no more distillate was distilled under the conditions of 1.3 kPa, 157°C.

[0169]

[0170] The residue obtained in the first distillation step is distilled at a pressure lower than that of the first distillation step. The degree of vacuum fluctuates between 10Pa and 150Pa within a period of time from the start of distillation, and finally stabilizes at 0.01kPa to 0.04kPa. The tempe...

example 3

[0185] The first distillation process and the second distillation process of the present invention were implemented under different conditions from Examples 1 and 2, and the initial working solution and the regenerated working solution for circulation were compared.

[0186]

[0187] 351 g of the same working solution as in Example 2 was placed in a 500 mL flask included in the distillation apparatus. Distillation is carried out under reduced pressure, and the vacuum degree is always controlled at 1.3kPa. The temperature in the flask was raised from room temperature to 180°C. The distillation was continued until finally no more distillate was distilled under the conditions of 1.3 kPa, 180°C.

[0188]

[0189] The residue obtained in the first distillation step is distilled at a pressure lower than that of the first distillation step. The vacuum degree is always controlled at 0.13kPa. The temperature in the flask was raised from room temperature to 250°C. The distillati...

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Abstract

The present invention provides a method for obtaining a high-quality regenerated working solution by removing an inactive material from a working solution containing trioctyl phosphate (TOP). A methodfor producing hydrogen peroxide includes a hydrogen peroxide production process of hydrogenating and then oxidizing a working solution containing aromatic hydrocarbons, TOP, and anthraquinones, to generate hydrogen peroxide, extracting the hydrogen peroxide from the working solution, after hydrogen peroxide extraction, the working solution returning to a hydrogenating process to cycle; a workingsolution regeneration process of removing the inactive material of a by-product of hydrogen peroxide generation from the working solution to prepare a crude regeneration working solution; and a step of performing alkali cleaning on the crude regeneration working solution to prepare a regeneration working solution for recycling, the working solution regeneration step comprising: i) a first distillation step of recovering aromatic hydrocarbons by distillation under atmospheric pressure or less; ii) then, a second distillation step of distilling and recovering the anthraquinones and the TOP underlower pressure and at temperature of 160 DEG C or higher.

Description

technical field [0001] The present invention relates to a method for producing hydrogen peroxide using anthraquinones, particularly a method for producing hydrogen peroxide including a step of regenerating a working solution. Background technique [0002] Hydrogen peroxide has oxidizing power and has strong bleaching and sterilizing effects, so it is used as a bleaching agent, bactericide, etc. for paper, pulp, fibers, and the like. Since the decomposition products of hydrogen peroxide are water and oxygen, it is also given an important position from the viewpoint of green chemistry, and it is attracting attention especially as a substitute material for chlorine-based bleaching agents. In addition, in the semiconductor industry such as surface cleaning of semiconductor substrates, chemical polishing of copper, tin and other copper alloy surfaces, and etching of electronic circuits, the amount of hydrogen peroxide used is gradually increasing. Also, hydrogen peroxide is wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/023
CPCC01B15/023C01B15/013
Inventor 松本伦太朗池田英俊茂田耕平
Owner MITSUBISHI GAS CHEM CO INC
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