EP 0028409 A1 1981-05-13 - De-ashing lubricating oils.
De-ashing lubricating oils.
Entfernen von Asche aus Schmierölen.
Elimination des cendres d'huiles lubrifiantes.
- US 9018379 A
- US 9213879 A
A process for the production of an essentially ash-free oil stock from a lubricating oil containing ash-forming components comprising (a) contacting said lubricating oil with an aqueous ammonium salt treating agent; (b) removing a major portion of the water from the mixture resulting from combining said aqueous solution and said lubricating oil; (c) heating at least a portion of the product resulting from step (b) at a temperature in the range of about 320 DEG to about 420 DEG C for a period of time sufficient to decompose at least a portion of any ammonium salts of sulfonic acid and dialkyldithiophosphoric acid that are contained therein; (d) cooling the product from step (c) to a temperature in the range of about 150 DEG to about 180 DEG C; and (e) separating the solids from the product of step (d), optionally with subsequent hydrotreating and stripping of the oil thus obtained.
IPC 1-7 (main, further and additional classification)
IPC 8 full level (invention and additional information)
CPC (invention and additional information)
Citation (search report)
Designated contracting state (EPC)
AT BE CH DE FR IT LI NL SE
DOCDB simple family
EP 0028409 A1 19810513; EP 0028409 B1 19840801; DE 3068812 D1 19840906; DK 464980 A 19810502; ES 496476 A0 19820116; ES 8202057 A1 19820116; FI 803415 L 19810502; GB 2064578 A 19810617; GB 2064578 B 19830824; GR 70787 B 19830323; PL 227595 A1 19810710; PT 72009 A 19801101; PT 72009 B 19810831; YU 278980 A 19830930