Continuous, multiple zone fluidized bed for particle treater

Details Continuous, multiple zone fluidized bed for particle treater Continuous, multiple zone fluidized bed for particle treater

1977-12-06

1979-01-23

Dees, Carl

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

422142, 422144, 422145, 422193, B01J 2900, B01J 800, C01B 1782

Patent

active

041360613

ABSTRACT:
A multiple zone apparatus for treating particulate solids and a method for treating particulate solids in seriatim multiple zones are provided. Particulate solids treatment such as the activation of chromium-silica olefin polymerization catalyst is carried out continuously by employing multiple fluidized beds with overflow of solids from one bed to the next lower bed. Each bed has its own source of heat and fluidizing gas to permit step-wise treatment of the particulate solids as particles pass through the system. Temperatures in each zone can be regulated for treatment of the solids in a predetermined manner. In a preferred embodiment each bed is transversely divided with a partition containing a hole sized for forwarding flow from the solids inlet side of the bed to the outlet side without backflow.

REFERENCES:
patent: 1836301 (1931-12-01), Bechthold
patent: 2689210 (1954-09-01), Leffer
patent: 2697653 (1954-12-01), Nicholson
patent: 2799558 (1957-07-01), Smith et al.
patent: 2833622 (1958-05-01), Roberts et al.
patent: 3573224 (1971-03-01), Strelzoff et al.
patent: 3661799 (1972-05-01), Cartmell
patent: 3931045 (1976-01-01), Rush

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