Mineral oils: processes and products – Chemical conversion of hydrocarbons – With preliminary treatment of feed
Reexamination Certificate
2007-10-16
2007-10-16
Nguyen, Tam M. (Department: 1764)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
With preliminary treatment of feed
C208S209000, C208S25400R, C208S25100H, C208S143000, C208S212000
Reexamination Certificate
active
10678689
ABSTRACT:
A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreating step is under conditions such that the amount of conversion to 343° C. minus is less than 5 wt. % of the feedstock and the VI increase is less than 4 VI over the feedstock. Hydrodewaxing uses a low alpha catalyst and hydrofinishing is accomplished with a catalyst based on the M41S family.
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Cody Ian A.
Gallagher, Jr. John E.
Hantzer Sylvain
Kim Jeenok T.
Larkin David W.
Carter Lawrence E.
Exxonmobil Research and Engineering Company
Kliebert J. J.
Nguyen Tam M.
LandOfFree
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