A question regarding the handling of lubricating oil
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I want to deal with used lubricating oil, but it cokes during distillation; I’m considering using propane deasphalting – will that solve the problem? Or the solvent extraction method – I’m curious to hear what everyone’s thoughts are.
It seems like it’s possible, but I’ve never heard of anyone doing it; I’ll ask around more.
Propane deasphalting or solvent extraction is certainly good, but the problem is the high processing costs.
For the treatment of used lubricating oil, it is first subjected to propane extraction to remove gums, asphaltenes, large-molecule additives, and polycyclic aromatic hydrocarbons from the oil, after which it proceeds to vacuum distillation. This is very helpful for coking.