Podbielniak extractors

Quadronics (L,iquid Dynamics) Extractor (Doyle et al., U.S. Patent 3,114,707, 1963, and others paper at AlChE meeting, St. Louis, February 1968) This is a horizontally rotated device, a variant of the Podbielniak extractor, in which either fixed or adjustable orifices may be inserted as a package radially. These permit control of the mixing intensity as the liquids pass radially through the extractor. Flow capacities, depending on machine size, range from 0.34 to 340 mVh (1.5 to 1500 gal/min). 

The culture broth (about 1,100 gallons in volume) is adjusted to pH 9.5 with 40% sodium hydroxide solution and is filtered to remove the mycelium, the filtration being assisted by use of 3% of Hyflo Super-Cel, a filter aid, (sold by Johns-IVlanville Company). The clear filtrate is extracted with amyl acetate in a Podbielniak extractor using a ratio of 1 volume of amyl acetate to 6 volumes of clarified broth. The amyl acetate extract is in turn extracted batchwise with water brought to about pH 5 by the addition of sulfuric acid. Two... 

Podbielniak extractor, 20 780-781 Pods, photographic-reagent-containing, 29 275... 

Podbielniak extractors Oelaval extractor Luwesta extractor Robatel extractor... 

Podbielniak Extractor (Podbielniak, U.S. Patent 2,044,996, 1935, and other patents) This is the most important of the group. Refer to Fig. 15-55. Rotation is about a horizontal shaft. The body of the extractor is a cylindrical drum containing concentric perforate cyhnders. The hquids are introduced through the rotating shaft with the help of specid mechanical seals the light liquid is led internally to the drum periphery and the heavy liquid to the axis of the drum. Rapid rotation (up to several thousand revolutions per minute. 

Podbielniak extractor. 478. 484. 487 Poiseuille equation, 94 Polyethylene reactor, 573, 574 Polytropic head, 156 Positive displacement pumps... 

Centrifugal Force Flow through baffles Westfalia Extractor Robatel Extractor Podbielniak Extractor Alfa Laval Extractor... 

The holdups of the two phases are very small, which is advantageous in certain applications. As the phases are in the co-current flow, they can attain equilibrium. Therefore, the extractor is at best one equilibrium stage. However, multiple units can be configured to form a multi-stage countercurrent extraction unit. There is a need to evaluate the relative merits of the multiple units configuration vis vis the Podbielniak extractor, which offers 4 to 6 stages in a single unit. 

Fig. 10.12. Schematic diagram of liquid flow through Podbielniak extractor. (Courtesy, Podbielniak, Inc.)...

Centrifugal Extractor. No systematic tests of the Podbielniak extractor have been reported. From 8 to 12 equivalent stages have been obtained... 

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