Title:
METHOD OF CONTROLLING ADDITION AND WITHDRAWAL OF CATALYST
Document Type and Number:
Japanese Patent JPS5292878
Kind Code:
A
Abstract:
In an upflow, ebullated bed reactor using a heterogeneous catalyst, a transport liquid compatible with the catalyst and the reactor feedstock is used. During the addition of fresh catalyst, a heated slurry of catalyst and transport liquid is pumped into the reactor under conditions to minimize (a) the temperature difference between the slurry and the reactor and (b) exposure of the fresh catalyst to a deactivating elevated temperature. During catalyst withdrawal, the temperature of the reactor effluent stream is controlled by mixing with a transport liquid. Measurement and flowability of the resultant mixture is thus assured.
Inventors:
RUISU SHII JIEEMUSU
Application Number:
JP14990676A
Publication Date:
August 04, 1977
Filing Date:
December 15, 1976
Export Citation:
Assignee:
CITIES SERVICE RES & DEV CO
International Classes:
B01J4/00; B01D43/00; B01J8/00; B01J8/02; (IPC1-7): B01J4/00; C10G13/00
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