Process for upgrading diesel oils.

摘要

A process for upgrading diesel oil comprising the steps
of:
<UnorderedLists id="ula01" listStyle="none"><ListItem>(1) reacting the diesel oil with a nitrogenous treating agent;</ListItem><ListItem>(2) contacting the diesel oil from step (1) above with
<UnorderedLists id="ula02" listStyle="none"><ListItem>(a) a primary solvent selected from the group consisting of organic solvents having a dipole moment of about 1.3 or greater and mixtures thereof, with the proviso that alkyl amines and alkanol amines are excluded, or a water mixture of the primary solvent comprising about 50% by weight or less water and;</ListItem><ListItem>(b) a cosolvent different from the primary solvent selected from the group consisting of an alcohol having 1 to 4 carbon atoms, an aldehyde having 1 or 2 carbon atoms, a ketone having 3 carbon atoms, a carboxylic acid having 1 or 2 carbon atoms and mixtures thereof, or a water mixture of the cosolvent <!-- EPO <DP n="2"> --> comprising about 50% by weight or less water;</ListItem></UnorderedLists></ListItem><ListItem>wherein the primary solvent and the cosolvent are each immiscible with the diesel oil or are in combination immiscible with the diesel oil, and</ListItem><ListItem>(3) separating the diesel oil from step (2) above from the primary solvent and from the cosolvent to recover upgraded diesel fuel.</ListItem></UnorderedLists>