(19)
(11) EP 1 106 673 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.02.2002 Bulletin 2002/06

(43) Date of publication A2:
13.06.2001 Bulletin 2001/24

(21) Application number: 00204357.8

(22) Date of filing: 06.12.2000
(51) International Patent Classification (IPC)7: C10G 67/04
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 06.12.1999 US 455069

(71) Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
2596 HR Den Haag (NL)

(72) Inventors:
  • Hewson, Alen Neal
    Katy, Texas 77450 (US)
  • Jois, Yajnanarayana Halmuthur
    Katy, Texas 77450 (US)
  • Kaushik, Krishna Rangraj
    Houston, Texas 77024 (US)
  • De Kraker, Abraham Robert
    Sugar Land, Texas 77479 (US)
  • Taylor, Paul William Henry
    Houston, Texas 77082 (US)

   


(54) Removal of polycyclic aromatic compounds from extracts


(57) The invention comprises a two stage process of producing aromatic process oil containing less than three weight percent polycyclic aromatics: A single step extraction of mixed extract from a lube extraction unit is carried out in the first stage. In this feed preparation step, sulphur, nitrogen, and polycyclic aromatics are significantly reduced. This precleaned extract is then used for the second stage, wherein a hydrogenation process is adopted to reduce polycyclic aromatics to less than three weight percent. In this process, the starting material has high polycyclic aromatics content and a final product having less than three weight percent polycyclic aromatics and greater than 40% total aromatics is obtained.






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