Patent ID: 7867381
Filing Date: 2011-01-11
Classification: C10G

Abstract:
1. An improved hydrocracking process comprising a process for treating a feedstream to a fluid catalytic cracking (FCC) unit that includes nitrogen-containing compounds and PNA compounds, the feedstream selected from the group consisting of de-metalized oil, deasphalted oil, coker gas oils, visbroken gas oils, fluid catalytic cracking heavy oils and mixtures thereof, the process comprising the steps of: (a) introducing the feedstream into the inlet port of at least one adsorption column that is upstream of an FCC unit, the feedstream containing an adsorbent material selected from the group consisting of attapulgus clay, alumina, silica gel and activated carbon; (b) maintaining the feedstream in contact with the adsorbent material to adsorb the nitrogen-containing and PNA on the adsorbent material, while maintaining the at least one adsorption column at a pressure in the range of 1 Kg/cm (c) continuously withdrawing treated feedstream from the at least one adsorption column; (d) directing the treated feedstream to an inlet of the FCC unit; (e) desorbing the adsorbed nitrogen-containing and PNA compounds to regenerate the adsorbent material; and (f) reusing the regenerated adsorbent material in steps (a)-(e), above.