Standards for tank cleaning
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Our workshop produces chemical raw materials, but they are used in pharmaceuticals. During shutdown, the reaction tank and storage tank need to be cleaned; there are no special requirements for the process – it simply involves cleaning the tanks at the time of shutdown. I need a cleaning quality standard. How can I tell that my jar is clean? This post was last edited by zxh6267 on 2009-3-28 09:07.]
Add an organic solvent for cleaning, and perform gas chromatography analysis on the solvent to check for any organic impurities. ---For reference only.
Then the solvent still needs to be cleaned off! Inorganic substances; they can’t be detected in the gas layer!
Repeating this process using gas can easily damage the column. It can be washed with water, then cleaned with an organic solvent, dried, and wiped with white paper to check if it is clean. After that, it should be cleaned with the solvent used in the reaction with that substance, and then there should be no problems.
Wash using the method you employ, and finally rinse three times with process water. Test the process water; if it meets the quality standards, it is acceptable.
According to your own process, use appropriate solvents, water + detergent, or process water for cleaning, test the water quality, and determine whether there are any residues.