Process for treating used motor oil and synthetic crude oil
December 8, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3625881 3819508 3835035 3919076 Reclaiming used motor oil Method of rerefining oil by distillation and extraction Method of rerefining oil with recovery of useful organic additives Process for preparing lubricating oil from used waste lubricating oil Method for reclaiming waste lubricating oils Reclaiming used lubricating oils with ammonium salts and polyhydroxy compounds InventorApplicationNo. 06/446791 filed on 12/08/1982US Classes:208/183, With acid or alkali208/180, With added organic material208/181, Plural treating agents (sequential or simultaneous)208/182, One is a solid contact material208/252With acidExaminersPrimary: Gantz, Delbert E.Assistant: McFarlane, Anthony Attorney, Agent or FirmInternational ClassC10M 175/00 (20060101)AbstractA process for treating used motor oil or synthetic crude oil comprising: (i) contacting said used motor oil or synthetic crude oil with an effective amount of (A) a polyfunctional mineral acid and/or the anhydride of said acid and (B) a polyhydroxy compound to react undesired contaminants contained in said used motor oil or synthetic crude oil with components (A) and/or (B) to form one or more reaction products; and (ii) separating said reaction products from said used motor oil or synthetic crude oil. A process for reclaiming used motor oil is also disclosed.Other References
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