Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Reexamination Certificate
2005-03-01
2010-06-01
Caldarola, Glenn (Department: 1797)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
C208S018000, C208S019000, C208S027000, C208S046000, C208S049000, C208S059000, C208S092000, C208S097000, C208S111050, C585S737000, C585S739000
Reexamination Certificate
active
07727379
ABSTRACT:
Process to prepare simultaneously two or more base oil grades and middle distillates from a mineral crude derived feed, in particular a de-asphalted oil or a vacuum distillate feed or their mixtures, by performing the following steps: (a) hydrocracking the mineral crude derived feed, thereby obtaining an effluent; (b) distillation of the effluent as obtained in step (a) into one or more middle distillates and a full range residue boiling substantially above 340° C., (c) catalytically dewaxing the full range residue by contacting the residue with a dewaxing catalyst comprising a zeolite of the MTW type and a Group VIII metal, thereby obtaining a dewaxed oil; (d) isolating by means of distillation two or more base oil grades from the dewaxed oil obtained in step (c); and (e) isolating a dewaxed gas oil from the dewaxed-oil obtained in step (c); wherein the dewaxed oil as obtained in step (c) comprises between 10 and 40 wt % of a dewaxed heavy gas oil boiling for more than 70 wt % between 370 and 400° C.
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Adams Nicholas James
Hegge Harmannus Julius
Huve Laurent Georges
Polder Kevin John Anthony
Steenge Wiecher Derk Evert
Caldarola Glenn
Shell Oil Company
Singh Prem C.
Stewart Charles W.
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