(19)
(11) EP 0 077 564 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.06.1983 Bulletin 1983/23

(43) Date of publication A2:
27.04.1983 Bulletin 1983/17

(21) Application number: 82109638

(22) Date of filing: 19.10.1982
(84) Designated Contracting States:
BE CH DE FR IT LI NL SE

(30) Priority: 19.10.1981 US 313036

(71) Applicant: PHILLIPS PETROLEUM COMPANY
 ()

(72) Inventors:
  • Johnson, Marvin Merill
     ()
  • Nowack, Gerhard Paul
     ()

   


(54) De-ashing lubricating oils


(57) A process for purifying used oil and the like comprising reacting the oil with a treating agent that will form solids from the ash-forming components of the oil, separating the solids from the oil, and subjecting at least a portion of the oil to a two stage hydrotreatment with interstage removal of hydrogen sulfide and/or ammonia.






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