A list of studies on the output of extraction columns using the RSM technique.
| System | Column | Variable | Response | Model | R 2, adj-R2 | Authors |
|---|---|---|---|---|---|---|
| Effluent of hydrodistillation of fennel–anisole–hexane | Rotary disc column (RDC) | N [rpm] | Efficiency (E) | E t = −23.01 + 0.7N − 0.28Qd − 7.57dn − 2.07 × 10−3NQd + 0.048Ndn + 0.01Qddn − 1.87 × 10−3N2 + 0.03Qd2 + 3.12dn2 | 0.964, 0.980 | Eyvazkhani et al.52 |
| Q d [cm3 min−1] | ||||||
| d n a [mm] | ||||||
| Effluent of hydrodistillation of fennel–essential oil–hexane | Rotary disc column (RDC) | N [rpm] | Efficiency (E) | E = −0.62922 + 6.3148 × 10−3N + 0.010004Qd + 0.48684dn − 2.00758 × 10−3Ndn − 8.46013 × 10−6N2 − 1.255 × 10−4Qd2 | 0.975, 0.959 | Jafari Ozumchelouei et al.53 |
| Q d [cm3 min−1] | ||||||
| d n a [mm] | ||||||
| TBP–nitric acid [0.05 M] | Pulsed disc and doughnut | A: duty cycle (%) | Dispersed phase hold up (φ) | φ = 23 − 2.13A + 9.16B + 6.83C + 2.65D − 1.75AB + 6.15BC + 1.17CD + 0.52AD + 1.25BD + 0.33BCD | n.d, 0.983 | Sinha et al.54 |
| B: Af [m s−1] | ||||||
| C: total throughput [m3 s−1] | ||||||
| D: O/A ratio | ||||||
| Toluene–water | Oldshue–Rushton | N [rpm] | Sauter mean drop diameter (d32) | d 32 = 11.062 − 0.045Qd − 0.046Qc − 0.072N + 0.0007QdQc − 2.1 × 10−5QdN + 7.1 × 10−6QcN + 0.0008Qd2 + 0.0005Qc2 + 0.0001N2 | 0.961, 0.926 | Torkaman et al.55 |
| Q c [m3 s−1] | ||||||
| Q d [m3 s−1] | ||||||
| Sulfate leach liquor – kerosene | Horizontal pulsed column | A f [cm s−1] | Sauter mean drop diameter (d32) | n.d. | 0.999, 0.977 | Khanramaki et al.41 |
| Q c [L h−1] | Efficiency (E) | |||||
| Q d [L h−1] |
a
d n: nozzle size, n.d: not defined.