Benzene-extracted water sample
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Water samples are taken from the benzene extraction unit; the water after washing in the wash tower is acidic, but the water used for stripping is actually alkaline. Why is this?
The entire water circulation system of our plant’s benzene extraction unit is alkaline; this includes the washing water used in the washing towers. The demineralized water used to replenish the water system is neutral, as is the solvent itself. Using the process of elimination, could it be that there is a problem with the membranes in the washing towers, which is causing the change in the system’s pH value?
Through our sampling analysis, the pH value is around 9. Is the solvent sulfolane normally acidic?
I hope everyone will share more of their opinions and ideas
Sulfolane has a slightly alkaline normal pH value, but it becomes more acidic during aging and decomposition
It doesn’t make sense; the system should be acidic, right? Do you order monoethanolamine? It is injected to maintain the acid-base balance of the system.
Hello, was it only the pH level of the water in the wash tower that was low at that time, while the pH levels of the other waters and solvents were normal? We are facing this problem now too. Could you tell me how you resolved it later on? What caused it?