Highspeed Centrifuges

Highspeed centrifuges are those operating up to speeds of 20,000 to 25,000 rpm. These machines, which account for the bulk of preparative 

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Figure 9-3. Sorvall refrigerated highspeed centrifuge. Meters display the temperature and running speed the two dials are used for selecting the speed and duration of centrifugation. (Courtesy of DuPont Instruments, Newtown, Conn.)...

First, the as-synthesized nanozeolites were separated from the mother liquid by highspeed centrifugation, and then redispersed in water (2 3 wt%), and the pH value was adjusted to 9.5 by 0.1M aq. NH3 to form zeolite suspensions. Second, hollow nanozeolite spheres were prepared by the LBL technique according to the procedure presented in Figure 4.33. 

Grumann M, Brenner T, Beer C, Zengerle R, Ducree J (2005) Visualization of flow patterning in highspeed centrifugal microfluidics. Rev Sci Instrum 76(2) 025101... 

Kek Mill. Trade-name (1) A pin-disk mill depending for its action on highspeed centrifugal force (2) a beater mill in which a four-armed beater revolves horizontally at high speed between upper and lower serrated disks. (Kek Ltd., Manchester, England.)... 

From the beginning of the 1980s, some effective experimental approaches based on new principles have been invented for the study of interfacial reactions in solvent extraction chemistry. Recently, some methods were developed from our laboratory, the highspeed stirring (HSS) method [4,5], the two-phase stopped flow method [6], the capillary plate method [7], the reflection spectrometry [8], and the centrifugal liquid membrane (CLM) method [9]. 

There are several types of wet collectors including spray towers, packed towers, and wet centrifugal collectors. The spray tower is a cylindrical or rectangular tower into which the incoming air is passed. Highspeed water sprays in the tower impact and remove the dust that is subsequently separated from the droplets by various types of eliminators. Spray towers are effective for all kinds of dust and even moisture-laden gases. 

Based on the differences between the solid and liquid density, batch centrifugation techniques are often used in the discovery phase as a convenient tool to separate the cell from the medium. Highspeed ultracentrifugation instruments have... 

Figure 2.14 Cut-away illustration of the internals of a highspeed, continuous, disc-nozzle centrifuge.

Ito, Y. Menet, J.-M. Coil Planet Centrifuges for Highspeed Countercurrent Chromatography. In Countercurrent Chromatography, Jean-Michel, M., Thiebaut, D., Eds. Marcel Dekker New York, 1999 87-119. Chapter 3. 

The CCC separation of procyanidin oligomers from apple condensed tannin was performed using a type-J highspeed CCC centrifuge (Fig. 1). The apparatus holds a multilayer coiled separation column and counterweight symmetrically at a distance of 10 cm from the central axis of the centrifuge. The separation column is fabricated by... 

The separations are performed using a commercial highspeed CCC centrifuge equipped with a multilayer coil separation column(s). The column is first entirely filled with the stationary phase that contains the desired amount of chiral selector (CS). In order to prevent the contamination of CS in the eluted fractions, some amount of the CS-free stationary phase should be left at the end of the column, typically at about 10% of the total column capacity. After the sample solution is injected through the sample port, the... 

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