I'm speaking of corrosion by naphthenic acidity in furfural lube extraction plants. Can anybody tell me what procedures, other than upgrading metallurgy in the solvent recovery circuit on the extract side, and trying to reduce the TAN values of the VGOs treated,is recommended ? Russian type crudes have this acidity in ther VGOs sometimes with TAN values higher than 0.6 mg KOH/g.
Are any filming inhibitors or neutralizers been used ?
Thanks for your attention.
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