Instances of Extraction Systems and Devices Using Parallel Flow

Instances of Extraction Systems and Devices Using Parallel Flow 

Other instances of extraction based on parallel flow using simple X- or Y-shaped channels are summarized in Table 12.1 [5-9]. 

Extraction devices using parallel flow combined with a membrane have also been developed. The fluids of two immiscible phases are separated by a membrane. Cai et al. performed extraction of butyl Rhodamine B (BRB) in aqueous solution into isobutanol. Polytetrafluoroethylene (PTFE) membranes with different pore sizes of 0.2, 0.45 and 1.0 pm (60 pm thick, 70-80% porosity) was placed between the two phases [10]. Aqueous flow rates in the range 22-65 pL min were investigated with a solvent flow-rate of 8.2 zpL min. The extraction efficiency improves with increasing membrane pore size and aqueous flow rate. 

Wang et al. developed an extraction device with a Celgard 2400 microporous polypropylene membrane [11]. It has an average thickness of 25 pm, the pore size is 0.05 pm and 38% of the surface is porous. The channel is made of polycarbonate and 

Extraction system Channel geometry and material Extraction time (s) 

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