Lubricant base oil and a process for producing the same, and lubricating oil composition
AssigneeJx Nippon Oil & Energy Corporation
InventorsKazuo Tagawa, Shigeki Matsui
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Abstract
A hydrocarbon-based lubricating base oil wherein a urea adduct value is not greater than 4% by mass, a viscosity index is 100 or higher, an average of carbon atoms number is 23-31 as determined by gas chromatography distillation, a value obtained by dividing an integral value of a peak in 30 ppm by an integral value of total peaks in the range of from 0 ppm to 50 ppm for the 13C-NMR spectrum is 0.1-0.2, and a product of a value obtained by dividing an integral value of peaks attributed to tertiary carbon atoms by an integral value of total peaks in the range of from 0 ppm to 50 ppm for the 13C-NMR spectrum, and the average of carbon atoms number, is 1.8-2.5.
Claims14
A hydrocarbon-based lubricating base oil wherein
- a urea adduct value is not greater than 4% by mass,
- a viscosity index is 100 or higher,
- an average of carbon atoms number is 23-31 as determined by gas chromatography distillation,
- a value obtained by dividing an integral value of a peak in 30 ppm by an integral value of total peaks in the range from 0 ppm to 50 ppm for the 13C-NMR spectrum is 0.1-0.2, and
- a product of a value obtained by dividing an integral value of peaks attributed to tertiary carbon atoms by an integral value of total peaks in the range of from 0 ppm to 50 ppm for the 13C-NMR spectrum, and the average of carbon atoms number, is 1.8-2.5.
A method for producing a hydrocarbon-based lubricating base oil comprising:
- a step of hydrocracking/hydroisomerization of a feed stock oil containing normal paraffins, so that a urea adduct value of an obtained treated product is not greater than 4% by mass, a viscosity index is 100 or higher, an average of carbon atoms number is 23-31 as determined by gas chromatography distillation, a value obtained by dividing an integral value of a peak in 30 ppm by an integral value of total peaks in the range from 0 ppm to 50 ppm for the 13C-NMR spectrum is 0.1-0.2, and a product of a value obtained by dividing an integral value of peaks attributed to tertiary carbon atoms by an integral value of total peaks in the range of from 0 ppm to 50 ppm for the 13C-NMR spectrum, and the average of carbon atoms number, is 1.8-2.5.
Dependencies are inferred from the claim text.