Patent ID: 6059959
Filing Date: 2000-05-09
Classification: B01J,C10G,Y10S

Abstract:
A hydrocarbon conversion process, comprising the steps of:(a) contacting a metals containing hydrocarbon feed with catalyst under conversion conditions to produce converted feed products and catalyst laden with coke and deposited metals from said feed, wherein the coke is preferentially deposited on relatively more active catalyst particles;(b) separating the catalyst from the converted feed products;(c) partially regenerating the catalyst in a regenerator by contact with an oxygen-containing gas to obtain partially regenerated catalyst containing about 0.05-3 weight percent carbon, wherein the carbon is preferentially removed from relatively high metal catalyst particles;(d) further regenerating the partially regenerated catalyst from step (c) to a carbon-on-catalyst level below 0.05 weight percent;(e) recycling the further regenerated catalyst from step (d) to step (a);(f) withdrawing a portion of the catalyst from step (c);(g) magnetically separating the withdrawn catalyst from step (f) into a relatively high metals fraction which is discarded and a relatively low metals fraction which is recycled to step (c), step (d) or step (e).