| 摘要 |
<p>Lubricating base oil compositions containing: (a) a lubricating base oil prepared from a vacuum distillate, a deasphalted vacuum residue or a mixture thereof, by applying to it a severe catalytic hydrotreatment, if desired, in combination with a solvent extraction, and (b) 0.01-20%w of an oil prepared from a vacuum distillate, a deasphalted vacuum residue or a mixture thereof, by applying to it a combination of a mild catalytic hydrotreatment and a solvent extraction show improved oxidation and daylight stability.</p> |
