Method and apparatus for multiphase contacting between gas, solid and liquid phases
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United States of America Patent
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Feb 17, 1987
Issued Date -
N/A
app pub date -
Aug 5, 1985
filing date -
Jun 15, 1982
priority date (Note) -
Expired
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Abstract
Multiphase contacting between gas, solid and liquid phases is effected using a novel apparatus comprising a cylindrical vessel, a draft tube, a conical bottom and a gas-sparger system. Mild and uniform mixing is achieved within the novel apparatus while stagnant zones and zones of high shear within the vessel are eliminated. Gas-liquid mass transfer is achieved at rates comparable to conventional high-shear mechanically-stirred devices while the efficiency of liquid mixing in the vessel is better than conventional low-shear pneumatically-stirred devices. The apparatus is preferably used in fermentation processes.
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