Apparatus for storing and stripping catalyst in a fluidized system

Claim 1

IN A APPARATUS FOR THE CONTACTING OF FLUIDS WITH FLUIDIZED SUBDIVIDED SOLID CATALYST PARTICLES SUCCESIVELY IN A REACTION CHAMBER AND A REGENARATION CHAMBER, THE COMBINATION OF A CONFINED VERTICALLY, ELONGATED STORAGE CHAMBER, MEANS FOR PASSING SOLID CATALYST PARTICLES FROM SAID REGENERATION CHAMBER INTO THE UPPER PORTION OF SAID STORAGE CHAMBER AND FOR MAINTAINING AA QUIESCENT BED OF CATALYST PARTICLES IN THE STORAGE CHAMBER, A PERFORATEWALLED PARTICLE WITHDRAWAL SECTION OF SUBSTANTIALLY LESSER CROSS-SECTIONAL AREA THAN SAID STORAGE CHAMBER EXTENDING VERTICALLY THORUGHOUT SUBSTANTIALLY THE MAJOR PORTION OF THE INTERIOR OF THE STORAGE CHAMBER, SAID WITHDRAWALA SECTION CONNECTING TO AND BEING CO-EXTENSIVE WITH A NONPERFORATE PARTICLE STRIPPING SECTION EXTENDING FROM THE LOWER PORTION OF THE STORAGE CHAMBER, A GAS OUTLET CONNECTING WITH THE UPPER PORTION OF THE STORAGE CHAMBER, A STRIPPING GAS INLET CONNECTING WITH THE LOWER END OF SAID STRIPPED SECTION, AND MEANS FOR PASSING STRIPPED CATALYST PARTICLES FROM THE LOWER END OF SAID STRIPPING SECTION TO SAID REACTION CHAMBER.