| 摘要 |
<p>The invention relates to a process for solvent dewaxing a hydrocarbon lubricating oil stock. Solvent dewaxed oils are steam stripped and then vacuum dehydrated at 2.5 psia (17.2 kPa) at the steam stripping temperature of 350 DEG F to 450 DEG F (177-232 DEG C). Nitrogen or natural gas having a dew point of -100 DEG F (-73 DEG C) or lower is contacted with the oil at 0.5 to 1 SCF/bbl (.09 to .18 Sm<3>/m<3>). A solvent free lubricating oil is produced which is water haze-free in cold storage.</p> |
