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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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0017] 3) Using heavy metal salts: Although the salts in the desulfurization solution can be

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

Examples

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Example Embodiment

[0039] The following describes a preferred embodiment of the present invention:

[0040] 1. Pre-treat the desulfurization solution to remove a large amount of alkaline salt substances contained in the solution:

[0041]1.1. Add an appropriate amount of concentrated phosphoric acid dropwise to the desulfurization solution, adjust the sample solution to be acidic, with a PH value of ≈ 3~4, shake it gently, so that the ammonium salt in the desulfurization solution reacts with phosphoric acid to form phosphate, and there is precipitation at the same time Precipitation

[0042] 1.2. Add an appropriate amount of methanol and shake it gently. The inorganic salt is not easily soluble in methanol to speed up the separation and precipitation speed, so that the solution sample is easy to filter, and the solution is placed until it is clear. Take the supernatant liquid and filter into the volume with a filter. bottle;

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

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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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