Mineral oils: processes and products – Products and compositions – Lubricating oils
Reexamination Certificate
2007-10-16
2007-10-16
McAvoy, Ellen M. (Department: 1764)
Mineral oils: processes and products
Products and compositions
Lubricating oils
C208S019000, C208S027000, C208S097000, C208S950000
Reexamination Certificate
active
10744870
ABSTRACT:
A process for manufacturing a lubricating base oil by: a) performing Fischer-Tropsch synthesis on syngas to provide a product stream; b) isolating from said product stream a substantially paraffinic wax feed having less than about 30 ppm total nitrogen and sulfur, and less than about 1 wt % oxygen; c) dewaxing said feed by hydroisomerization dewaxing using a shape selective intermediate pore size molecular sieve comprising a noble metal hydrogenation component, wherein the hydroisomerization temperature is between about 600° F. (315° C.) and about 750° F. (399° C.), to produce an is dimerized oil; and d) hydrofinishing said isomerized oil to produce a lubricating base oil having specific desired properties.
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“Product Brochure of Shell MDS (Malaysia) Sdn Bhd” dated May 1995.
Abernathy Susan M.
Kramer David C.
Krug Russell R.
Miller Stephen J.
Rosenbaum John M.
Abernathy Susan
Chevron USA Inc.
McAvoy Ellen M.
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