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Table 1 Structural information and operating conditions used in the proposed process. The tray numbers are counted from the top

From: Energy-efficient recovery of fermented butyric acid using octyl acetate extraction

Variable Extractor Dist. Col. I Dist. Col. II Dist. Col. III
Structural
Tray No. 32 31 35 48
Feed 1 14 18 14
Solvent 32    
Recycle 2    
Operating
Pressure (MPa)-top 0.1 0.1 0.1 0.1
Temperature (°C)
 Overhead 25 141.8 100.0 130.1
 Bottom 25 214.0 164.7 162.7
Feed (kg/h) 10,000 8831 343 269
Solvent (kg/h) 8501    
Make-up (kg/h) 13.0    
Recycle (kg/h) 74.0    
Product (kg/h)
 Overhead 8831 343 74 4.0
 Bottom 9744 8488 269 265
Reflux (kg/h) 789 259 296
Vap. boil up(kg/h) 7491 1284 188
Cooling duty (MW) − 0.17 − 0.14 − 0.03
Reboiler duty (MW) 0.56 0.14 0.02
Preheat/cool (MW) − 0.98 0.62 0.004 0.01
Comp. (mass frac.)
Feed
 Butyric acid 0.0267 0.0311 0.8001 0.9849
Product Ovhd Ovhd Btm Btm
 Butyric acid 0.0311 0.8001 0.9849 0.9977