| 摘要 |
A process for the conversion of a nitrogen-containing hydrocarbon oil at elevated temperature and pressure, in the presence of hydrogen and in a reaction system containing a single solid acid-acting conversion catalyst, comprises contacting the hydrocarbon oil with a minor portion of the total catalyst, organic nitrogen compounds being converted to ammonia, thereby withdrawing ammonia-containing gas from the reaction system, treating the withdrawn gas to remove at least part of the ammonia, and contacting the treated gas and the hydrocarbon oil with the remaining portion of the total catalyst. The conversion process may comprise hydrocracking, hydrodenitrification, hydroisomerization, catalytic cracking or reforming. In an example, an oil which had previously been hydrotreated to reduce the nitrogen content from 516 p.p.m. to 25 p.p.m. was hydrocracked on a nickel-fluorine-silica-alumina catalyst arranged in four sequential reactors, the vapour from the first being treated for removal of ammonia before returning to the remaining stages. |
