| 摘要 |
<p>Disclosed is a process for recovering hydrocarbons from tar sands by contacting the tar sands with alkali metal sulfides or alkanol solutions of alkali metal hydrosulfides, at temperatures between 40.degree.C and 450.degree.C, in the presence of steam or hydrogen or mixtures thereof, thereby producing at least partially, hydrogenated hydrocarbons lower in sulfur and nitrogen content than the initial untreated hydrocarbons of the tar sands and which readily distill from the sands.</p> |
