Dry, acidic, pale in color
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Gentlemen, we use the tailings-based acid production process. Recently, the acid obtained after drying had a good color; it turned white after being left for two hours, and then its color improved again after another two or three days. Could anyone tell me what the reason for this is?
Some dry acid samples were placed in stoppered flasks for observation; it is presumed that this was due to the gradual precipitation of suspended particles.
Check if there are sulfur sublimation particles
Check whether there are sulfur sublimation particles, or if there have been any abnormalities with the vacuum pump recently, such as frequent startups and shutdowns.
After placement, there was no obvious precipitation. Master of Moments – if they are suspended particles, where do these particles come from?
Try to collect the precipitate and perform a loss on ignition test to determine whether it is sublimed sulfur.