Table 3 Rice bran oil has been esterified with different amounts of glycerol for the preparation of the corresponding monoglycerides in the presence of SiO2-TiO2 after 6 h (T = 170 °C catalyst = 2 % by weight, 84 % FFAs, 16 % triglycerides)
Entry | Catalyst | Gly/FFA | MonoGly (% mol) | %DiGly (% mol) | %TriGly (% mol) | FFAs Conv (%) |
|---|---|---|---|---|---|---|
1 | SiO2-TiO2 | 1.2:1 | 44.7 | 55.3 | 0.0 | 90.3 |
2 | 2nd run | 58.8 | 41.2 | 0.0 | 85.4 | |
3 | SiO2-TiO2 | 2:1 | 43.3 | 56.7 | 0.0 | 95.2 |
4 | SiO2-TiO2 | 3:1 | 42.6 | 57.4 | 0.0 | 93.3 |
5 | SiO2-TiO2act.a | 1.2:1 | 32.9 | 67.1 | 0.0 | 93.9 |
6 | SiO2-TiO2act.a | 2:1 | 34.0 | 57.6 | 8.4 | 92.0 |