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Method for mensurating picronitric acid in desulfurization fluid

A technology for desulfurization liquid and picric acid, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as waste water and precipitation that are not environmentally friendly, achieve stable peak retention time, improve accuracy and stability, and eliminate measurement errors. Effect

Active Publication Date: 2007-02-21
BAOWU CHARCOAL MATERIAL TECH CO LTD
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Problems solved by technology

[0017] 3) Using heavy metal salts: Although the salts in the desulfurization solution can be removed, the waste water and sediment produced are not conducive to environmental protection

Method used

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  • Method for mensurating picronitric acid in desulfurization fluid
  • Method for mensurating picronitric acid in desulfurization fluid
  • Method for mensurating picronitric acid in desulfurization fluid

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Embodiment Construction

[0039] A preferred embodiment of the present invention is illustrated below:

[0040] 1. Pretreat the desulfurization solution to remove a large amount of alkaline salts contained in the solution:

[0041]1.1. Add an appropriate amount of concentrated phosphoric acid to the desulfurization solution, adjust the sample solution to be acidic, with a pH value of ≈3-4, and shake gently to make the ammonium salt in the desulfurization solution react with phosphoric acid to form phosphate, and at the same time, precipitate precipitation;

[0042] 1.2. Then add an appropriate amount of methanol, shake gently, and use inorganic salts that are not easily soluble in methanol to speed up the separation and precipitation, so that the solution sample is easy to filter, put the solution until it is clear, take the upper clarified liquid, and filter it into the capacity with a filter head bottle;

[0043] 1.3. Wash the precipitate with a small amount of methanol, filter the washing liquid i...

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Abstract

A method for determining picric acid in doctor solution includes removing off large amount of basic salt matter in solution then applying external standard means of liquid phase chromatography to analyze content of picric acid in test sample of doctor solution.

Description

technical field [0001] The invention relates to a method for measuring picric acid in desulfurization liquid. Background technique [0002] At present, the gas refining process generally adopts the F / R (Fersum) method. First, the desulfurization liquid absorbs hydrogen sulfide and hydrogen cyanide in the gas to obtain an absorption liquid; Hydrogen sulfide and hydrogen cyanide are oxidatively regenerated, and the solution obtained after regeneration is regeneration liquid; the regeneration liquid can be recycled as desulfurization liquid again. In the process of using the F / R method to refine gas, it is necessary to use picric acid as a catalyst, and picric acid plays a vital role in the desulfurization regeneration efficiency of the desulfurization liquid. However, in the desulfurization process of the continuous circulation of picric acid, the content of picric acid in the desulfurization liquid will gradually decrease due to various factors such as poisoning deterioratio...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/86
Inventor 杨泽静陆惠萍冯学伟
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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