Distillates (petroleum), hydrotreated heavy paraffinic
Distillates, petroleum, hydrotreated heavy paraffinic
A complex combination of hydrocarbons obtained by treating a petroleum fraction with hydrogen in the presence of a catalyst.  It consists of hydrocarbons having carbon numbers predominantly in the range of C20 through C50 and produces a finished oil of at least 100 SUS at 100.degree.F (19cSt at 40.degree.C).  It contains a relatively large proportion of saturated hydrocarbons.