Research Article
Optimized Liquid-Liquid Extractive Rerefining of Spent Lubricants
Table 2
Sorted CCD and response data for liquid-liquid extraction of spent lubricant with ketone (methyl ethyl ketone).
| Run | Process variables | Response | (h) | (°C) | | (%) | |
| 1 | 50 | 60 | 2 | 1.1699 | 0.1569 | 2 | 10 | 35 | 2 | 1.3385 | 0.2915 | 3 | 10 | 60 | 4 | 1.4477 | 0.3700 | 4 | 30 | 60 | 4 | 1.7203 | 0.5425 | 5 | 30 | 35 | 4 | 1.9575 | 0.6717 | 6 | 10 | 35 | 4 | 1.0101 | 0.6982 | 7 | 30 | 35 | 4 | 1.0476 | 0.7167 | 8 | 30 | 35 | 4 | 1.0811 | 0.7329 | 9 | 30 | 60 | 6 | 1.1018 | 0.7428 | 10 | 50 | 35 | 4 | 1.2148 | 0.7952 | 11 | 30 | 35 | 4 | 1.2384 | 0.8058 | 12 | 30 | 35 | 4 | 1.3168 | 0.8402 | 13 | 30 | 10 | 2 | 1.3902 | 0.8714 | 14 | 30 | 35 | 2 | 1.4280 | 0.8871 | 15 | 30 | 35 | 4 | 1.4283 | 0.8872 | 16 | 30 | 35 | 4 | 1.4363 | 0.8905 | 17 | 50 | 35 | 6 | 1.4458 | 0.8944 | 18 | 30 | 35 | 4 | 1.4986 | 0.9157 | 19 | 30 | 35 | 6 | 1.6554 | 0.9766 | 20 | 50 | 10 | 4 | 3.1180 | 1.1372 | 21 | 10 | 10 | 6 | 3.4540 | 1.2395 | 22 | 30 | 10 | 4 | 3.7284 | 1.3160 |
|
|