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Combined detection method for high-purity SO3 gas and impurity SO2 gas therein

A SO2, high-purity technology, used in chemical analysis by titration, material analysis by observing the impact on chemical indicators, and analysis by chemical reaction of materials, etc. detection and other problems, to achieve the effect of good measurement precision

Inactive Publication Date: 2010-02-03
SHANGHAI WUJING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is cumbersome and complicated, and cannot combine SO 3 and SO 2 Gas joint detection
[0005] Another example is the Japanese patent JP203014633A2SO 3 Densitometer, which provides an accurate measure of SO by monitoring the pressure of gas cells at high temperatures 3 content of the densitometer, but this method is only applicable to SO in flue gas 3 content measurement, not suitable for high concentration SO 3 Gas content and its SO 2 Joint determination of impurity gas content

Method used

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  • Combined detection method for high-purity SO3 gas and impurity SO2 gas therein
  • Combined detection method for high-purity SO3 gas and impurity SO2 gas therein
  • Combined detection method for high-purity SO3 gas and impurity SO2 gas therein

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Effect test

Embodiment 1

[0041] The test was carried out under the climate conditions of 35°C and 1 atmosphere, the temperature inside the insulation jacket was controlled to be 70°C, and the gas temperature was 70°C. The test results are as follows:

[0042]

Embodiment 2

[0044] The test was carried out under the climate conditions of 5°C and 1 atmosphere, the temperature inside the insulation jacket was controlled to be 70°C, and the gas temperature was 70°C. The test results are as follows:

[0045]

[0046] According to the data obtained above and the standard deviation value, it is shown that under the condition of stable gas flow, high-purity SO in this method 3 Gas and its impurity SO 2 The measurement precision of gas volume percentage concentration is good, and the measurement standard deviation is not more than 0.1%.

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Abstract

The disclosed combined detection method for high-pure SO3 gas with SO2 as impurity comprises: constant-volume sampling at least 60Deg better 60-80Deg to avoid liquidation of SO3, absorbing with alkalisolution to obtain total volume percentage concentration of high-pure SO3 gas and SO2; processing the absorbed liquid, using iodometric method to obtain SO2 volume percentage concentration and then the SO3 concentration. This invention brings an error less than 0.1%.

Description

technical field [0001] The present invention relates to high purity SO 3 Gas and its impurity SO 2 Gas detection methods. The method belongs to a trinity of sampling, constant volume and absorption for the detection of high-purity SO 3 Gas and its impurity SO 2 Combined detection method of gas. Specifically, it involves the evaporation and analysis of fuming sulfuric acid to produce high-purity SO 3 Gas and its impurity SO 2 The detection method of gas volume percent concentration. Background technique [0002] In a patented process of using high-purity sulfur trioxide to synthesize chlorosulfonic acid, it breaks through the traditional concept that only low-concentration sulfur trioxide can be used to prepare chlorosulfonic acid. However, the synthesis reaction of high-concentration sulfur trioxide gas and high-concentration hydrogen chloride gas has the advantages of reducing raw material consumption, less pollution, and good product quality. Practice has proved tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16G01N21/79G01N1/22
Inventor 顾晓燕戴文涛朱建祥周祥毅赵兴虎钱珍章觉之
Owner SHANGHAI WUJING CHEM
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