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High-purity hydrogen peroxide and production method thereof

A production method and high-purity technology, applied in the field of fine chemicals, can solve the problems of low added value of hydrogen, and achieve the effects of low production cost and simple process flow

Pending Publication Date: 2022-05-31
CHEM & CHEM ENG GUANGDONG LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrochemical method also has technical disadvantages, such as the low added value of hydrogen precipitated by the cathode of the bismuth vanadate method, and the anode of the oxygen cathode reduction method requires the use of precious metal platinum, etc.

Method used

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  • High-purity hydrogen peroxide and production method thereof

Examples

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Effect test

Embodiment 1

[0023] Embodiment 1: Food grade / chemically pure / analytical pure hydrogen peroxide production method

[0024] In this embodiment, the electrolyzer, the evaporator and the rectification column in the production equipment are lined with fusible polytetrafluoroethylene PFA. The electrolytic cell adopts doped bismuth vanadate single crystal as anode material, graphite / carbon black / polytetrafluoroethylene composite as cathode material, and the cathode and anode are separated by proton exchange membrane. The evaporator adopts a falling film evaporator, and the rectification column adopts a primary rectification device. The applied bias voltage is 2.5V, and the current density during electrolysis is 0.25A / cm 2 .

[0025] The pure water 111 in the raw material adopts the third-grade water (conductivity ≤ 0.5mS / m, evaporation residue ≤ 2ppm) in accordance with GB / T 6682-2008 for analytical laboratory water; oxygen 113 is prepared by an oxygen generator with a purity of ≥ 90%. High pu...

Embodiment 2

[0028] Embodiment 2: production method of excellent pure grade hydrogen peroxide

[0029] In this embodiment, pure water 111 adopts secondary water (conductivity ≤ 0.1mS / m, evaporation residue ≤ 1ppm) that conforms to the analytical laboratory water GB / T 6682-2008; oxygen 113 adopts industrial high-purity oxygen (≥ 3N), Electrolyte 112 is Na 2 CO 3 (≥99.99%).

[0030] The production flow and process parameters are the same as or similar to those in Example 1. The organic and inorganic content of the obtained high-purity hydrogen peroxide 116 was analyzed, and the results were: H 2 O 2 30.0wt%; TOC<100ppb; evaporation residue<1ppm, typical metal ion content: Na<50ppb, other metal ions<20ppb, all indicators meet the requirements of excellent pure hydrogen peroxide.

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Abstract

The invention discloses high-purity hydrogen peroxide. The TOC (Total Organic Carbon) content of the high-purity hydrogen peroxide is lower than 1000ppb. The invention further discloses a production method of the high-purity hydrogen peroxide, pure water and oxygen are adopted as raw materials, the production method comprises an electrolysis process and a distillation process, the electrolysis process adopts an oxide single crystal wafer as an anode material of an electrolytic bath and a carbon-based material as a cathode material, neutral or alkaline electrolyte is added into the electrolytic bath, and the high-purity hydrogen peroxide is obtained. And after high-purity oxygen is introduced into the cathode, bias voltage is applied to the anode and the cathode of the electrolytic bath, so that the anode is subjected to a two-electron water oxidation reaction to generate hydrogen peroxide, and the cathode is subjected to an oxygen reduction reaction to generate hydrogen peroxide. The method has the beneficial effects that the total organic carbon content in the high-purity hydrogen peroxide can be ignored, inorganic impurities are efficiently removed through a distillation process, and high-quality food-grade and reagent-grade hydrogen peroxide can be obtained; the technological process is simple and the production cost is low.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a food-grade and reagent-grade high-purity hydrogen peroxide and an electrochemical production method thereof. Background technique [0002] Hydrogen peroxide (aqueous hydrogen peroxide solution) is an important chemical raw material with clean and non-polluting properties. It is widely used in printing and dyeing, papermaking, environmental protection, food, chemical synthesis and semiconductor industries. The industrial production methods of hydrogen peroxide include barium peroxide method, ammonium persulfate method, anthraquinone method, isopropanol method and oxygen cathode reduction method. Among them, the anthraquinone method is the mainstream industrial production method at home and abroad, and its total chemical reaction equation is H 2 +O 2 =H 2 O 2 , its advantages are mature technology, high degree of automation control, low raw material cost and energy consumption, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/30C25B15/08C01B15/013
CPCC25B1/30C25B15/083C01B15/013Y02P20/10
Inventor 李国岭
Owner CHEM & CHEM ENG GUANGDONG LAB