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Cleaning method for filter core used for hydrogen peroxide production process

A production process, hydrogen peroxide technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of long time, affecting production and operation, and achieve the effect of simple equipment, flexible maintenance plan and arrangement, and cost saving.

Inactive Publication Date: 2014-08-27
ARKEMA HYDROGEN PEROXIDE CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method needs to transport the filter to the original factory for cleaning. Sometimes the filter is imported equipment, and it takes about half a year to send it back and forth for cleaning. The time is too long, which affects the operation of the production

Method used

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  • Cleaning method for filter core used for hydrogen peroxide production process

Examples

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Comparison scheme
Effect test

Embodiment 1

[0014] Such as figure 1 As mentioned above, a method for cleaning the filter element used in the production process of hydrogen peroxide, the filter element is first placed in the solvent benzene and soaked for 1 h, then placed in lye, that is, NaOH with a mass concentration of 3%, and cleaned for 0.5 h, and then placed in acid solution, that is, the mass concentration Concentration of 2% HNO 3 Neutralize, and finally rinse with deionized water for 3 times.

Embodiment 2

[0016] A method for cleaning a filter element used in a hydrogen peroxide production process. First, the filter element is soaked in solvent benzene for 2 hours, then placed in lye, that is, NaOH with a mass concentration of 10%, and cleaned for 2 hours, and then placed in an acid solution, that is, a mass concentration of 8%. HNO 3 Neutralize in neutralization, then soak in benzene solvent again for 2 hours, then place in lye, that is, NaOH with a mass concentration of 10%, wash for 2 hours, and then place in acid solution, that is, HNO with a mass concentration of 8%. 3 Neutralize, cycle twice, and finally rinse in deionized water for 5 times.

Embodiment 3

[0018] Such as figure 1 As mentioned above, a method for cleaning the filter element used in the production process of hydrogen peroxide, the filter element is first placed in the solvent trimethylbenzene and soaked for 1.5 hours, then placed in lye, that is, NaOH with a mass concentration of 5%, and cleaned for 1 hour, and then placed in acid solution. The mass concentration is 5% HNO 3 Neutralize, cycle three times in turn, and finally rinse in deionized water for four times.

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Abstract

The invention relates to a cleaning method for a filter core used for a hydrogen peroxide production process. The cleaning method comprises the steps of immersing the filter core in a solvent for 1-2 h; then cleaning for 0.5-2h in an alkali solution; then neutralizing in an acid solution; and finally rinsing for 3-5 times in deionized water. Compared with a conventional cleaning method, the cleaning method provided by the invention has the advantages of being simple, convenient, cost-saving and time-saving.

Description

technical field [0001] The invention relates to a production of hydrogen peroxide, in particular to a method for cleaning a filter element in a hydrogen peroxide process. Background technique [0002] Hydrogen peroxide is a colorless liquid with a pungent odor. It is a strong oxidizing agent and is easy to decompose. Under the conditions of alkalinity, reducing substances and metal ions, it will react violently, decompose or even explode. Hydrogen peroxide is an excellent organic peroxide, which has a wide range of applications in many aspects. It has high-efficiency and rapid sterilizing effect, and can quickly kill bacteria, spore fungi, yeast and other germs, so it can be used as an infectious disease, drinking water Disinfectants for water, food, etc. [0003] In the production process of hydrogen peroxide, in order to prevent the catalyst from entering the downstream reactor, it is necessary to use a filter to block the catalyst, but the pass rate of the filter will de...

Claims

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Application Information

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IPC IPC(8): B01D41/04
Inventor 朱焱蒋兴江
Owner ARKEMA HYDROGEN PEROXIDE CO LTD SHANGHAI
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