Lubricant base oil and method of producing the same
AssigneeJapan Energy Corporation
InventorsManabu Kobayashi, Katsuaki Ishida, Masayuki Saito, Hiroshi Yachi
Life of this patent
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Abstract
This invention relates to lubricant base oil having high viscosity indexes and low pour points, and particularly to lubricant base oil consisting essentially of a normal paraffin and an isoparaffin, wherein (a) an average carbon number Nc in one molecule is not less than 28 but not more than 40, and (b) an average branch number Nb in one molecule calculated from a ratio of CH3 carbon to total carbon determined by 13C-NMR analysis and the average carbon number Nc in one molecule is not more than (0.2Nc−3.1) but not less than 1.5.
Claims20
Lubricant base oil consisting essentially of a normal paraffin and an isoparaffin, and satisfying the following requirements (a), (b) and (c):
- (a) an average carbon number Nc in one molecule is not less than 29 but not more than 35;
- (b) an average branch number Nb in one molecule, which is derived from a ratio of CH3 carbon to total carbon determined by 13C-NMR analysis and the average carbon number Nc in one molecule, is not more than (0.2Nc−3.1) but not less than 1.5;
- and
- (c) a viscosity index is 145-170 and a kinematic viscosity at 40° C. is 17-25 mm2/s.
Dependencies are inferred from the claim text.