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Membrane distillation concentration method for hydrogen peroxide solution

A hydrogen peroxide solution, membrane distillation technology, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozone, inorganic chemistry, etc., can solve the problem of large product loss , The equipment is large in size and the operating cost is high, so as to achieve the effect of simple process, avoiding high temperature decomposition and avoiding decomposition

Inactive Publication Date: 2011-02-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional concentration process mostly adopts the evaporation-distillation concentration technology. For dilute solutions with a hydrogen peroxide content of less than 50wt.%, the operating temperature during the concentration process is usually 60-150°C, and the operation is under reduced pressure; but because hydrogen peroxide is easy to Decomposition often causes safety problems in the production and concentration process, and the device has high energy consumption, large equipment volume, large product loss, and high operating costs. Therefore, it is necessary to develop a safe, energy-saving, and simple device flow concentration method

Method used

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  • Membrane distillation concentration method for hydrogen peroxide solution
  • Membrane distillation concentration method for hydrogen peroxide solution
  • Membrane distillation concentration method for hydrogen peroxide solution

Examples

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Effect test

Embodiment 1

[0026] The flat-plate membrane distillation component is selected, and the membrane distillation is realized in the form of direct contact, and the device is as attached figure 1 , using a hydrophobic polyvinylidene fluoride microporous membrane. The raw material liquid is 20.05wt.% hydrogen peroxide solution, and the cold fluid is tap water at 0-3°C.

[0027] Add 250ml of this hydrogen peroxide solution into the raw material tank 2 as a raw material solution, heat it to a constant temperature of about 30°C by the heat source 1, turn on the raw material pump 3, and open the valve 5 to introduce cooled tap water on the permeation side of the membrane module 4, and the constant temperature raw material solution It is pumped into the raw material side of the membrane module 4 through the raw material pump 3 . The raw material liquid flows through the flat membrane module at a flow rate of 20L / h, and the water and a small amount of hydrogen peroxide in it pass through the membran...

Embodiment 2

[0030] The flat-plate membrane distillation component is selected, and the membrane distillation is realized in the air-gap type, and the device is as attached figure 2 , using hydrophobic polytetrafluoroethylene microporous membrane. The raw material liquid is 20.05wt.% hydrogen peroxide solution, and the temperature of the cooling plate is obtained by cooling an aqueous solution of ethylene glycol at -5 to -1°C.

[0031]Add 250ml of the hydrogen peroxide solution as a raw material solution into the raw material tank 2, heat it to a constant temperature of about 40°C by the heat source 1, open the valve 5 and let the cooled ethylene glycol aqueous solution lower the temperature of the cooling plate in the membrane module 4, and open Raw material pump 3, the constant temperature raw material solution is pumped into the raw material side of the membrane module 4 through the raw material pump 3. The raw material liquid flows through the flat membrane module at a flow rate of 2...

Embodiment 3

[0034] The flat-plate membrane distillation component is selected, and the membrane distillation is realized in the form of vacuum, and the device is as attached image 3 , using hydrophobic polypropylene microporous membrane. The raw material liquid is 29.95wt.% hydrogen peroxide solution, and the cooling liquid circulating in the condensing system is an aqueous solution of ethylene glycol at -5 to -1°C.

[0035] Add 250ml of the hydrogen peroxide solution as a raw material solution into the raw material tank 2, heat it from the heat source 1 to a constant temperature of about 50°C, turn on the raw material pump 3, the condensing system 6 and the vacuum pump 9 successively, and the constant temperature raw material solution enters the membrane through the raw material pump 3 Component 4 raw side. The raw material liquid flows through the flat membrane module at a flow rate of 20L / h, and the water and a small amount of hydrogen peroxide in it pass through the membrane pores t...

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Abstract

The invention discloses a membrane distillation concentration method for hydrogen peroxide solution, and belongs to the technical field of concentration of the hydrogen peroxide solution. The method is characterized in that a hydrophobic microporous membrane which is not soaked by the hydrogen peroxide solution is adopted, wherein a membrane distillation concentration device is selected for concentrating the hydrogen peroxide solution; the raw material side is the hydrogen peroxide solution which is heated at a constant temperature; the penetration side is in any form of cold fluid, air gap cooling plate, vacuum and carrier gas blowing; water in the aqueous solution of the hydrogen peroxide on the raw material side penetrates through membrane holes to the penetration side in the form of steam under the action of steam pressure difference on the two sides of the membrane; and water vapor on the penetration side is removed by condensation of the cold fluid, cooling of the air gap cooling plate, vacuuming or carrier gas blowing, so that the concentration of the hydrogen peroxide solution is realized. The method has the following advantages that: the operating conditions are mild by using the membrane distillation concentration method; the operating temperature is lower, so the decomposition of the hydrogen peroxide caused by high operating temperature is prevented; and the process has low energy consumption and simple flow, is easy to operate and saves the energy.

Description

technical field [0001] The invention belongs to the technical field of hydrogen peroxide solution concentration, and relates to a method for concentrating hydrogen peroxide solution by membrane distillation. Background technique [0002] Hydrogen peroxide is commonly known as hydrogen peroxide, and its chemical formula is H 2 o 2 , it is an important inorganic chemical raw material and fine chemical product, because the oxygen produced by the decomposition of hydrogen peroxide has multiple functions such as bleaching, oxidation, disinfection and sterilization, and has good activity and no side effects, so it is widely used in Textile, papermaking, food, medicine, environmental protection, chemical synthesis, electronics, military industry and aerospace and other fields, especially at present people have higher and higher requirements for environmental protection, hydrogen peroxide has a very broad application prospect as an environmentally friendly product. [0003] In ind...

Claims

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Application Information

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IPC IPC(8): C01B15/013
Inventor 贺高红李伟娇代岩聂飞李翠娜吴雪梅
Owner DALIAN UNIV OF TECH
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