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US 5,547,562 AGranted
Oil dewaxing method
AssigneeNalco/Exxon Energy Chemicals, L.P.
InventorsRupinder S. Grewal, Michael E. Joyce, Randall F. Nord
Life of this patent
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Abstract
The invention decloses a method for dewaxing a hydrocarbon oil which comprises adding an oil-soluble poly C.sub.18 -C.sub.22 alkylmethacrylate having a molecular weight of from about 10,000 to about 2,000,000 daltons to a hydrocarbon oil containing wax; cooling the oil to allow wax crystals to form, separating the wax crystals from the oil and recovering a dewaxed oil.
Claims6
A method for dewaxing a hydrocarbon oil which comprises:
- a. adding polybehenyl methacrylate having a molecular weight of from about 10,000 to about 2,000,000 daltons to a hydrocarbon oil containing wax;
- b. cooling the oil to allow wax crystals to form;
- c. separating the wax crystals from the oil;
- and
- d. recovering a dewaxed oil.
2 more elements
Dependencies are inferred from the claim text.