1,3-diglyceride-rich edible oils from glycerolysis of vegetable oils. Effect of the catalyst basic properties

L.A. DOSSO; L.A. DOSSO; P.J. LUGGREN; P.J. LUGGREN; J.I. DI COSIMO; J.I. DI COSIMO

LATIN AMERICAN APPLIED RESEARCH

PLAPIQUI(UNS-CONICET)

Lugar: Bahia Blanca; Año: 2020 vol. 5 p. 133 - 138

0327-0793

Vegetable edible oils enriched in diglycerides were obtained by glycerolysis under heterogeneous catalysis conditions using MgO as catalyst. These oils contain up to 32wt.% of the 1,3-diglyceride isomer, which is believed to present unique nutritional properties to prevent obesity, compared to triglycerides or 1,2-diglycerides. The base site density and strength distribution of the different sites (weak, medium and strong) present on MgO as well as the initial oil con-version rate depend on the preparation procedure. The density of medium-strength sites increases upon increasing the severity of the preparation procedure in the range of 673-873K in parallel to the initial oil conversion rate. These results confirm that medium-strength base sites promote the kinetically relevant reaction steps involved in the glycerolysis of vegeta-ble oils.