B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/40
B01J 38/72 (2006.01) B01J 37/00 (2006.01) B01J 38/60 (2006.01) B03B 4/00 (2006.01) B03B 4/02 (2006.01) B07B 13/02 (2006.01) C10G 45/02 (2006.01)
Patent
CA 1294943
Abstract of the Disclosure A mixture of shaped, catalyst particles comprising generally cylindrical, free flowing catalyst particles having substantially the same diameter and of varying length are length graded into a first group of particles having a length below a predetermined length, L1, said length L1 being in the range of from 0.8 to about 24 millimeters and at a value of L/D greater than one, and a second group of particles having a length greater than L1, by: feeding the catalyst mixture into a cylindrical drum having inwardly opening indentations in a cylindrical wall thereof, the indentions having a transverse diameter of substantially L1; rotating the drum about a longitudinal axis thereof at a speed sufficient entrap in the indentations and convey the particles having a length below L1 and comprising the first group upwardly to a height permitting the particles to fall into a fixed, upwardly opening trough, while retaining par- ticles having a length above L1 in a bottom portion of the drum; conveying the particles in the trough out a first outlet; and conveying the particles in the bottom of the drum out a second outlet, separate from said first outlet and recovering said particles having a length above L1. In addition a spent catalyst particle mixture comprising rela- tively uncontaminated particles and heavily contaminated particles is density graded by suspending relatively uncon- taminated and lightly contaminated particles above said heavily contaminated particles, causing the heavily contam- inated particles to move upwardly along an inclined, vibrat- ing surface and thereafter being collected at a first out- let, the lightly contaminated particles contacting a lower portion of said vibrating surface and being collected at a second outlet, and the relatively uncontaminated particles contacting a portion of said vibrating surface below that contacted by the lightly contaminated particles, and with- drawing said relatively uncontaminated particles from a third outlet. Spent catalyst particles can be length and density graded and subjected to regeneration and rejuvena- tion.
531554
Ellingham Robert E.
Welch J. Gary
Borden Ladner Gervais Llp
Cri International Inc.
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