Patent ID: 7829750
Filing Date: 2010-11-09
Classification: B01J,C10G

Abstract:
1. A process for fluidizing catalyst particles in a reactor or regenerator, wherein the process comprises the steps of: providing a reactor or regenerator having at least two longitudinally adjacent obstructing members within the dense bed of the reactor or regenerator and further a lifting medium flowing therein, wherein the reactor or regenerator comprises a reaction zone and a separation zone, and the dense bed is situated within the reaction zone; and flowing a plurality of catalyst particles in a tortuous path around the at least two obstructing members in a dense bed phase at a pressure oscillation within the dense bed of not greater than 1.0 inch (2.54 cm) of water, wherein the catalyst particles have a d wherein the lifting medium is fed from the bottom of the reactor or regenerator; wherein the reactor or regenerator further comprises one or more obstructing members within the separation zone for at least partially obstructing the upward flow of entrained catalyst, wherein one or more obstructing members are situated less than 2 meters above the dense bed; and wherein the distance between longitudinally adjacent obstructing members is greater than about 0.5 meter and less than about 10 meters.