Chlorine analysis method
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Our chlor-alkali plant used the absorption method to analyze the purity of chlorine in the main pipeline in the past. Chromatography is used now, but it takes over 30 minutes, and the analysis results have no practical value at all. I would like to ask about the current methods used in the industry to analyze chlorine gas
But the time it takes for our factory’s analysts to take samples and conduct analyses is too long – basically around 30 minutes (and the data provides no guidance for production). Sometimes, they even forget to report the analysis results to the operators on the job. What’s most frustrating is that on several occasions, analysts misanalyzed data showing that the chlorine purity was usually 97%, reporting it as 99% (even though the ion exchange membrane had been in use for 4 years), and they even reported this to the operators on duty. (Production and analysis are not the same department).
You want the analysis results to be available within a few minutes; how can half an hour not be sufficient for guidance? Are your process equipment unstable? 97% to 99% – are you sure no acid was added? The process parameters haven’t changed. In our company, since we started operations in 2008, the purity of chlorine has remained stable at 99.2%. Don’t blame the testing department for everything; don’t shift all the responsibility onto them
Just yesterday, the control room analysts determined that the purity of chlorine gas, which is usually around 98.5%, was actually 95% (the electrolyzer has been in use for 13 years; it underwent major repairs in 2011 and its ion exchange membrane was replaced in 2016). :L
Just yesterday, the control room analysts determined that the purity of chlorine gas, which is usually around 98.5%, was actually 95% (the electrolyzer has been in use for 13 years; it underwent major repairs in 2011 and its ion exchange membrane was replaced in 2016). :L
For central control analysis, it is not necessary to pursue extremely high accuracy, as long as it can effectively guide production.
For chlorine purity, it is sufficient to use the absorption method as a reference; there is no need for excessive precision, as this is the practice in the industry.
To get results and analysis within a few minutes – I don’t know if I’m being naive, but is it really possible to conduct such fast analysis? You just need to have your company install an online monitoring system as soon as possible; manual sampling and analysis take time
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