Reclaiming used lubricating oils

Details Reclaiming used lubricating oils Reclaiming used lubricating oils

C - Chemistry, Metallurgy

10

M

196/202, 196/52

C10M 175/00 (2006.01)

Patent

CA 1107673

25859 Abstract of the Disclosure An integrated process universally applicable for the reclaiming of used lubricating oils, regardless of the contaminants or previous additive systems contained therein, is provided to produce an intermediate low-ash oil or a high-grade lube oil stock which comprises (a) contacting the used oil with an aqueous ammonium salt treating agent, (b) removing a major por- tion of water, (c) separating the oil phase from the resulting residual product, (d) subjecting the resulting separated oil to hydrotreating and thereafter (e) stripping the resulting hydrotreated lube oil stock. Option- ally the low-ash product of step (c) can be recovered for use as a fuel oil, in grease formulations, or in the preparation of some types of lubricating oil formulations.

300536

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