Catalyst withdrawal

Details Catalyst withdrawal Catalyst withdrawal

1975-12-17

1977-11-22

Levine, Herbert

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

208157, 208DIG1, 222 54, 302 16, 302 66, C10G 1300

Patent

active

040595021

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.

REFERENCES:
patent: 2325611 (1976-08-01), Keranen
patent: 3547809 (1970-12-01), Ehrlich et al.

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