Extraction extractor design

Initial Extraction Technique Continuous extraction apparatus was employed, including an extractor designed to contain the starting plant materials, a distillation flask to hold the solvent mixture, the flask being equipped with a reflux condenser, a drip device to facilitate the removal of the volatilized mixture from the condenser and to percolate it through the continuous extractor, and a Soxhiet type return. Means for heating the continuous extraction system were provided. 

The Model 50 Supercritical Fluid Microextractor from the Suprex Co. (Pittsburgh, PA) was adapted for this design. A schematic of our multi-vessel extractor design can be found in Figures 1 and 2, for six and twelve multi-vessel systems, respectively. The following is a detailed description of the main components. The design, explained here for the extraction from six and twelve vessels is in principle applicable to any number of vessels, provided that other components of the system are scaled up. 

Our industry is starved for data such as that shown in Fig. 7.10 and Table 7.4. Perhaps books and technical journal articles will eventually supply much missing information on these liquid-liquid extraction process areas. Nonetheless, these data as presented herein have been used successfully in many extractor design and rating solutions, and will no doubt be used in the same applications in the future. These tried and proven data are the best choice if actual field operating data with laboratory backup are not available. 

A small-scale chain conveyor type of extractor was developed in the 1940s at Iowa State University with the intent of using trichloroethylene solvent to extract soybeans. Crown Iron Works of Minneapolis, Minnesota, licensed the technology and extractor design, and supplied several continuous solvent extraction plants in 1951 using the new extractor and trichloroethylene solvent (6). The meal from these plants proved detrimental to animals, so the plants were either closed or converted to petroleum-based solvents (7). The chain-type extractor apparatus continued on and is the basis of the modern Crown Iron Works Model III extractor used today. 

Cartridge case such as Cl is extracted vrocn the breech 22 of barrel 13 by an extractor designated for example in FIG. 7 by the numeral 48. As the cartridge case such as Cl moves toward the left in unison with the bolt 21, ejector pin 49 strikes the cartridge case Cl and drives the case downwardly and outwardly through the ejector opening 50 formed in frame I. This action is depicted in FIG. 8. Of course the ejec-... 

The advancing front and reversible reaction models both predict that the amount of extraction depends on the emulsion residence time and the ratio of emulsion and bulk phase feed rates, Vg/Vb, as measured by the dimensionless group ot- No Independent dependence on the hold-up ratio, Vg/Vbi Is Indicated. For extractor designs which permit Ve/Vb to differ from model... 

The multistage electrophoretic method has been developed by combining free electrophoresis and multistage extraction and is explored as an improved alternate method for the purification and concentration of cells or macromolecules. The present discussion is restricted to cells and particles. The present design is based on a derivative of the thin-layer multistage extractor design of Albertsson [70] and Treffrey et al. [71] and called ADvanced SEParation apparatus (ADSEP), designed by SHOT, Inc. [42]. 

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