Method and apparatus for multiphase contacting between gas, soli

Details Method and apparatus for multiphase contacting between gas, soli Method and apparatus for multiphase contacting between gas, soli

1985-08-05

1987-02-17

Naff, David M.

Chemistry: molecular biology and microbiology

Micro-organism, per se ; compositions thereof; proces of...

Bacteria or actinomycetales; media therefor

435254, 435314, 435315, 435804, 435818, 422227, 422231, 261123, 261124, C12M 122, C12M 108, C12M 106

Patent

active

046439722

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.

REFERENCES:
patent: 3439807 (1966-09-01), Danjes
patent: 3536305 (1970-10-01), Lefraneois
patent: 3807565 (1974-04-01), Langston
patent: 4263143 (1981-04-01), Ebner et al.
patent: 4290885 (1981-09-01), Kwak

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