Chemistry: physical processes – Physical processes – Crystallization
Patent
1975-03-06
1977-02-08
Scovronek, Joseph
Chemistry: physical processes
Physical processes
Crystallization
23290, 259 8, 259 97, 259102, B01F 716, B01F 724, B01J 304
Patent
active
040070166
ABSTRACT:
A reactor of one or more stages for the continuous processing of high viscosity materials wherein each stage is provided with a stage barrier for directing and controlling the flow of process materials within each stage of the reactor and for controlling the egress of material from each stage of the reactor. A rotor shaft is rotatably mounted at opposite end walls of the reactor and extends through the reactor coaxially with its longitudinal axis. Fixably attached to the rotor shaft for rotation within each stage is a mixing assembly including a cylindrical draft tube positioned coaxially with respect to the reactor side wall, a helical screw mounted within the draft tube, and a ribbon agitator mounted within the annular space between the draft tube and reactor wall and having a pitch opposite to that of the helical screw. The agitator and the helical screw have preselected relative pitches and dimensions so that, when rotated, they cooperate with the stage barrier, the vessel wall and the draft tube to recirculate a predetermined portion of process material in a fixed flow pattern within each stage while advancing a remaining predetermined portion of the process material out of the stage in one direction.
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patent: 3752653 (1973-08-01), Weber
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patent: 3877881 (1975-04-01), Ono et al.
Marcus Michael S.
Scovronek Joseph
The Bethlehem Corporation
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