De-ashing lubricating oils

Details De-ashing lubricating oils De-ashing lubricating oils

C - Chemistry, Metallurgy

10

G

196/58

C10G 29/20 (2006.01) C10G 29/06 (2006.01)

Patent

CA 1198995

Abstract of the Disclosure In a process for producing an essentially ash-free oil stock from a lubricating oil containing ash forming components comprising reacting the oil with an aqueous ammonium salt capable of reacting with the ash-containing components and heating the thus treated oil at a temperature in the range of about 300°C to about 420°C to increase the amount of the ash-forming components removed, the improvement comprising not exposing the oil to a temperature greater than 200°C before the oil is passed into a large volume of the oil already at a temperature in the range of about 300°C to about 400°C.

430417

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