Composition containing 1,3-di-unsaturated fatty acyl-2-saturated fatty acyl glyceryl ester as well as preparation method and application thereof

[0098] Example 1

[0099] Grease composition 1

[0100] Mix palm oil stearin with IV=14.4 and high oleic sunflower oil in a ratio of 3:1, heat to 105°C, vacuum and stir at the same time, keep it for 1 hour, and dehydrate; add the above mixture weight to the transesterification tank 0.5% sodium methoxide as a catalyst, react at 80°C for 45 minutes; then add 20% citric acid aqueous solution (concentration 8%) of the above mixture weight and continue stirring for 20 minutes to terminate the reaction. Wash the reactant with water to pH=7, desoap, and then heat to 105°C for 30 minutes to dehydrate and dry; add 2% activated clay by weight of the mixture after dehydration and drying, and keep it at 110°C for 30 minutes for decolorization. Filter to obtain transesterified grease. Finally, the obtained transesterified grease was deodorized at 240°C, 2mbar and nitrogen blowing for 3 hours to obtain refined grease. The refined oil and oleic acid were mixed in a ratio of 1:2 and passed through a packed bed filled with 100g Lipozyme RM IM lipase for enzymatic directional transesterification. The temperature of the mixture and lipase was 60°C. The directional transesterification mixture obtained by the reaction was subjected to reduced pressure molecular distillation to remove fatty acids therein, and finally oil composition 1 was obtained. The results are shown in Table 1.

[0110] Example 2

[0111] Grease composition 4

[0112] Mix palm oil stearin with IV=22 and high oleic sunflower oil in a ratio of 3:1, add 6% (weight) lipase Lipozyme TL IM, and stir at 65°C for 24 hours for randomization reaction. Then the lipase is filtered and the fat is physically refined. Including adding 2% by weight of activated clay to the enzymatic transesterification mixture, decolorizing by keeping it at 110°C for 30 minutes, filtering, and finally deodorizing the obtained transesterified grease at 240°C, 2mbar and nitrogen blowing for 3 hours to obtain refining grease. Finally, the refined oil and oleic acid were mixed in a ratio of 1:2 and passed through a packed bed filled with 100g Lipozyme RM IM lipase for enzymatic directional transesterification. The temperature of the mixture and lipase was 60°C. The directional transesterification mixture obtained by the reaction was subjected to reduced pressure molecular distillation to remove fatty acids therein, and finally oil composition 4 was obtained. The results are shown in Table 2.

[0121] Example 3

[0122] Grease composition 7

[0123] Mix palm oil stearin with IV=34.6 and high oleic sunflower oil in a ratio of 4:1, heat to 105°C, vacuum and stir at the same time, keep for 1 hour, and dehydrate; add the weight of the mixture to the transesterification tank 0.5% sodium methoxide as a catalyst, react at 80°C for 45 minutes; then add 20% citric acid aqueous solution (concentration 8%) of the above mixture weight, continue stirring for 20 minutes to terminate the reaction. Wash the reactant with water to pH=7, desoap, and then heat to 105°C for 30 minutes to dehydrate and dry; add 2% activated clay by weight of the mixture after dehydration and drying, and keep at 110°C for 30 minutes for decolorization. Filter to obtain transesterified grease. Finally, the obtained transesterified grease was deodorized at 240°C, 2mbar and nitrogen blowing for 3 hours to obtain refined grease. The refined oil and oleic acid were mixed in a ratio of 1:2 and passed through a packed bed filled with 100g Lipozyme RM IM lipase for enzymatic directional transesterification. The temperature of the mixture and lipase was 60°C. The directional transesterification mixture obtained by the reaction was subjected to reduced pressure molecular distillation to remove fatty acids therein, and finally oil composition 7 was obtained. The results are shown in Table 3.