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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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13.15 Introduction to Design of Reciprocating-Plate (Karr) Columns

Because the desired design conditions conflict (see Section 13-14), a number of different extractor designs (Figure 13-2 and Table 13-1) have been commercialized that attempt to find a good compromise between the competing design requirements. A number of column systems with external power applied to promote mixing have been developed. One generic design that is often a favorable compromise between the conflicting demands is the reciprocating-plate column (RPC) (Baird et al., 1994; Frank et al., 2008; Smith et al., 2008). In an RPC the plates move up and down (Figure 13-2) to promote mixing without forming a stable emulsion. Although first patented by Van Dijck in 1935, the RPC ...

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