Aromatic extraction: how to reduce solvent loss in the raffinate
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In our company’s aromatic extraction unit, there is a significant loss of solvent in the raffinate oil. It wants to be reduced to 0.5 wtppm. I hope experts can offer some help
I was thinking whether it might be possible to slightly reduce the top pressure and temperature of the recovery tower
The main reasons for the high solvent content in the raffinate oil after washing are as follows: ? ① The washing ratio is too low. ?② The solvent content in the raffinate is too high. ?③ The upper circulation volume is too high or too low. ?④ The washing water contains solvents. ?⑤ The lower circulation volume is too low. ?⑥ The water washing tower is operating beyond its capacity. Identify the cause and take appropriate action
It is probably because the water washing ratio is too low.