High-purity hydrogen peroxide preparation method and purifying system

A hydrogen peroxide, high-purity technology, applied in chemical instruments and methods, peroxides/peroxyhydrates/peroxyacids/superoxides/ozone oxides, inorganic chemistry, etc. Hydrogen peroxide and other problems, to achieve the effect of slowing down the thermal decomposition rate and the safety of the rectification process

Inactive Publication Date: 2019-01-18
HANGZHOU ELECTROCHEM GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides a high-purity hydrogen peroxide preparation method and a purification system to solve the existing problem that high-purity hydrogen peroxide cannot be prepared well

Method used

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  • High-purity hydrogen peroxide preparation method and purifying system

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Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing high-purity hydrogen peroxide includes the following steps:

[0036] a. Turn on the vacuum pump to keep the high vacuum of the rectification system at -0.095Mpa, even if the distillation tower 1 and the reboiler 3 maintain a high vacuum of -0.095Mpa;

[0037] b. Put 2 liters of phosphoric acid from the first pipe 11 into the rectification tower 1, and then pass the circulating pump 4 into the reboiler 3 to circulate and heat to 72°C;

[0038] c. The industrial hydrogen peroxide with a mass fraction of 35% is fed into the rectification tower 1 from the first pipe 11 at a flow rate of 2L / Hr at a uniform speed, and is heated by the reboiler 3 under high vacuum to become steam. After purification by the rectification tower 1, about 35% of high-purity hydrogen peroxide is extracted from the second pipe 22 in the middle and lower part of the rectification tower 1 at a flow rate of 1.9L / Hr; a small amount of hydrogen peroxide is decomposed into water due to hea...

Embodiment 2

[0043] a. Turn on the vacuum pump to keep the rectification system high vacuum at -0.093Mpa, even if the distillation tower 1 and reboiler 3 maintain a high vacuum environment of -0.093Mpa;

[0044] b. Put 2 liters of phosphoric acid from the first pipe 11 into the rectification tower 1, and then pump it into the reboiler 3 through the circulation pump 4 to circulate and heat to 76°C;

[0045] c. The industrial hydrogen peroxide with a mass fraction of 27% is fed into the distillation tower 1 from the first pipe 11 at a constant speed at a flow rate of 2L / Hr. Under high vacuum, it becomes steam after being heated by the reboiler 3, and is purified by the distillation tower 1. The second pipe 22 in the middle and lower part of the rectification tower 1 produces about 27% high-purity hydrogen peroxide at 1.9L / Hr.

[0046] d. The third pipe 33 at the top of the rectification tower 1 produces water at a flow rate of 0.3L / Hr, and supplements the high-purity water with a flow rate of 0.2L / ...

Embodiment 3

[0050] a. Turn on the vacuum pump to keep the rectification system high vacuum at -0.097Mpa, even if the rectification tower 1 and reboiler 3 maintain a high vacuum environment of -0.097Mpa;

[0051] b. Put 2 liters of phosphoric acid from the first pipe 11 into the rectification tower 1, and then pass the circulating pump 4 into the reboiler 3 to circulate and heat to 69°C;

[0052] c. Add 50% industrial hydrogen peroxide at a flow rate of 2L / Hr from the first pipe 11 into the rectification tower 1 at a uniform speed. Under high vacuum, it will become steam after being heated by the reboiler 3 and purified by the rectification tower 1. , From the second pipe 22 in the middle and lower part of the rectification tower 1 at a flow rate of 1.9L / Hr, about 50% of high-purity hydrogen peroxide is produced.

[0053] d. The third pipe 33 at the top of the rectification tower 1 produces water at a flow rate of 0.3L / Hr, and supplements the high-purity water with a flow rate of 0.2L / Hr from the...

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Abstract

The invention discloses a high-purity hydrogen peroxide preparation method and a purifying system. The preparation method comprises the following steps: obtaining a vacuum environment: utilizing a vacuum pump for keeping a rectification system to be in a highly vacuum state; adding a purifying medium: adding the purifying medium into a rectifying tower, conveying the purifying medium into a re-boiler to circulate and heat; purifying hydrogen peroxide: adding industrial hydrogen peroxide which is taken as a raw material into the rectifying tower, heating hydrogen peroxide into steam through there-boiler under the highly vacuum state, and collecting high-purity hydrogen peroxide from the middle lower part of the rectifying tower after purifying through the rectifying tower. The purifying system comprises the rectifying tower, a condenser, a vacuum pump, the re-boiler and a circulating pump, wherein the parts are connected through pipelines. The high-purity hydrogen peroxide preparationmethod reduces harm of hydrogen peroxide thermal decomposition, and improves safety; and an obtained product is high in purity, and can be applied to a food industry and an electronic industry.

Description

Technical field [0001] The invention relates to a hydrogen peroxide purification technology, in particular to a high-purity hydrogen peroxide preparation method and purification system. Background technique [0002] At present, high-purity hydrogen peroxide can be divided into food grade and electronic grade according to its use. Food grade hydrogen peroxide is often used in the production process of purified water, dairy products, beverages, aquatic products, fruits, vegetables, beer, etc. for disinfection, sterilization, preservation, decolorization and antiseptic. Electronic grade high-purity hydrogen peroxide is mainly used as a cleaning agent for semiconductor crystal wafers, an etching agent and a photoresist remover. [0003] In recent years, the demand for high-purity hydrogen peroxide has been increasing year by year, and the market prospect is very broad. Domestic food-grade manufacturers have already produced it. Electronic grade is mainly imported and joint venture. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/013
CPCC01B15/013
Inventor 卢孔燎郑琪楼锦焕
Owner HANGZHOU ELECTROCHEM GROUP
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