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US 7,022,784 B2Granted
Synthetic lubricant composition and process
AssigneeExxonMobil Research and Engineering Company
InventorsMargaret May-Som Wu, Steven P. Rucker, Richard T. Spissell, Steven Edward Donnachie
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Abstract
A liquid polymer suitable for use as a lubricant base oil is produced by polymerizing ethylene and at least one alpha-olefin using a metallocene catalyst to provide a polymer which is then isomerized and hydrogenated to produce the liquid polymer.
Claims9
A method for forming an ethylene-alpha olefin polymer suitable for use as a lubricant base oil comprising:
- (a) polymerizing an olefin feed containing ethylene and at least one alpha-olefin in the presence of a metallocene catalyst system under conditions sufficient to produce a liquid polymer;
- (b) isomerizing the liquid polymer in the substantial absence of molecular hydrogen and in the presence of an acidic isomerization catalyst to produce an isomerized liquid polymer;
- and
- (c) hydrogenating the isomerized liquid polymer in the presence of a hydrogenation catalyst to produce an ethylene-alpha olefin polymer suitable for use as a lubricant base oil.
1 more element
Dependencies are inferred from the claim text.