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P a r r I n s t r u m e n t C o m p a n y
Catalyst Baskets
C
atalyst baskets can be provided for holding a supported
catalyst so that it will not be destroyed or changed by the stir-
ring action of the impeller. These can be installed in reactors with
volumes ranging from 300 to 2000 mL. Two interchangeable styles
are available. Special heads, internal cooling coils, thermowells
and dip tubes are required to provide clear space in the vessel for
these baskets.
The Static Design
In the static design the mesh basket holding the catalyst
remains stationary while impellers on the stirring shaft and baffles
outside of the basket direct the flow of reactants over the surface
of the contained catalyst. A unique gas entrainment impeller pro-
vides a uniform flow of both gas and liquid over the fixed catalyst
bed held within the annular basket. The Parr design for these
baskets includes a rigid bottom support which permits high speed
stirring without excessive vibration. Cooling coils, internal tem-
perature measurements, and liquid and gas sampling operations
can be continued as usual without interference from the installed
catalyst basket.
The Dynamic Design
In the dynamic design the catalyst is held in an annular shaped,
mesh basket which is attached to the stirrer drive in place of the
stirring shaft. The rotating basket then serves as an impeller for
stirring the reactants. Fixed baffles and coaxial impellers ensure
good circulation over the surface of the contained catalyst. The
dynamic baskets are available for reactors with volumes of 1000,
1800, and 2000 mL. Dynamic baskets must be installed in reactors
equipped with at least 1/4 hp motors to ensure that sufficient
stirrer torque and speeds are available for proper operation.
Dynamic baskets are interchangeable with static baskets in 1 liter
and larger vessels.
Catalyst Basket Static Design with Uniflow Stirrer
 Catalyst Basket Dynamic Design
Catalyst Basket Static Design
