Reasons for the high non-aromatic sulfur content in the aromatic hydrocarbon extraction unit
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I’m using aromatic extraction, but for some reason the sulfur content in the non-aromatic compounds is high. Can someone help analyze the reason?
It is caused by the aging and decomposition of the extraction solvent, sulfolane.
The poor-solvent filter hadn’t been cleaned for a long time, and it had turned black, forming soft black clogs. One by one.
Non-aromatic compounds containing sulfolane or sulfolane degradation products can cause excessive sulfur content.
Poor operation of the wash tower can also lead to the presence of non-aromatic solvents, resulting in an excessive sulfur content.
Is everything else normal? If it is only the non-aromatic compounds that have high sulfur content, it’s possible to check whether there has been aging and decomposition; if everything is normal on the reforming side, then abnormal fluctuations in reforming can be ruled out.