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Method for preparing mixed ester rich in OPO structural lipids

A technology of mixed ester and structural fat, applied in the field of preparation of mixed ester, can solve the problems of less source of oil and fat raw materials, increased production process and high cost, and achieve the effect of shortening process flow and improving safety

Active Publication Date: 2018-12-25
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, some people use tea oil and olive oil to provide oleic acid to synthesize OPO structural lipids, but the cost is high and the source of oil raw materials is scarce; while commercial oleic acid uses mixed oils as raw materials, its source cannot be traced, and the oil is hydrolyzed by medium pressure The obtained fatty acid needs to be purified by high-temperature rectification, which increases the production process

Method used

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  • Method for preparing mixed ester rich in OPO structural lipids
  • Method for preparing mixed ester rich in OPO structural lipids
  • Method for preparing mixed ester rich in OPO structural lipids

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preparation example Construction

[0032] The invention provides a kind of preparation method of the mixed ester that is rich in OPO structure fat, comprises the following steps:

[0033] 1) The high oleic peanut oil is subjected to alcoholysis reaction or medium pressure hydrolysis reaction to obtain a reaction product; the oleic acid content of the high oleic peanut oil is ≥ 70%; the reaction product of the alcoholysis reaction is fatty acid ethyl ester, and the middle The reaction product of pressure hydrolysis reaction is fatty acid;

[0034] 2) The reaction product obtained in the step 1), palm stearin and Sn-1, 3-position-specific lipase are mixed and then transesterified to obtain mixed esters rich in OPO structural lipids.

[0035] In the present invention, the high oleic peanut oil undergoes alcoholysis reaction or medium pressure hydrolysis reaction to obtain a reaction product; the oleic acid content of the high oleic peanut oil is ≥70%; the reaction product of the alcoholysis reaction is fatty acid ...

Embodiment 1

[0064] 1) Weigh 2.16g NaOH into a 1000mL three-neck flask, add 160g absolute ethanol and 432g high oleic peanut oil, and stir magnetically in an oil bath at 75°C for 1.5h under nitrogen protection. After completion of the reaction, cool to room temperature, remove excess ethanol by rotary evaporation under reduced pressure, then pour into a separatory funnel and let stand to separate layers, separate the sodium hydroxide, glycerin and soap in the lower layer, wash with 50 ° C distilled water until neutral, reduce The reaction product fatty acid ethyl ester was obtained by rotary steaming and dehydration, which was packed into a 500mL sample bottle, filled with nitrogen gas for protection and placed in a refrigerator for later use.

[0065] 2) The fatty acid ethyl ester and palm stearin obtained in step 1) are weighed in a molar ratio of 2:1, 3:1, 4:1, 5:1, 6:1, wherein the palm stearin is 20g, 0.0225mol . The weighed fatty acid ethyl ester and palm stearin were placed in a 25...

Embodiment 2

[0082] The molar ratio of fatty acid ethyl ester to palm stearin is 5:1, and the transesterification time is 30min, 1h, 2h, 4h, 6h respectively. Other reaction conditions are identical with embodiment 1. Obtain the target product.

[0083] Figure 4 It is the influence of transesterification reaction time on synthetic effect in embodiment 2.

[0084] Depend on Figure 4 It can be seen that when the reaction time increased from 30min to 6h, the OPO content and the 2-position palmitic acid accounted for all palmitic acid content first increased and then decreased, and the palmitic triglyceride content first decreased and then stabilized. As the reaction time increased from 30min to 1h, the reaction proceeded in the direction of positive reaction, the reaction was more complete, the content of the target product increased significantly, and the reaction reached equilibrium at 1h, the OPO content was 44.07%, and the 2-position palmitic acid accounted for all palmitic acid The ...

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Abstract

The invention provides a method for preparing mixed ester rich in OPO structural lipids and belongs to the technical field of organic synthesis. In the method, high-oleic-acid peanuts are taken as rawmaterials, fatty acid ethyl ester or fatty acid obtained through alcoholysis or medium-pressure hydrolysis directly synthesizes the mixed ester rich in the OPO structural lipids with the help of catalytic action of enzyme with palm stearin, purification steps of oleic acid are reduced, the process flow is shortened, and safety of products is improved. Data from embodiment indicates that in the mixed ester rich in the OPO structural lipids, prepared from the fatty acid ethyl ester / fatty acid with the palm stearin, the OPO content (C52 triglyceride content is the national standard), 2-palmiticacid in total palmitic acid content and the rest of the content of the palmitic acid triglyceride are 46.35% / 44.17%, 60.73% / 57.60% and 5.67% / 4.07% respectively, and product indicators meet the provision of national standard GB30604-2015.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a method for preparing mixed esters rich in OPO structural lipids. Background technique [0002] Human milk is the best food source for babies, it provides comprehensive and balanced nutrition for babies, and promotes their growth and development. There are about 4% lipids in human milk, of which triglyceride accounts for more than 98%. It is one of the main nutrients in human milk and provides certain energy for babies. Due to the lack of breastfeeding conditions in some areas, infants who cannot receive breastfeeding mainly use formula milk as a substitute. However, the structure of fatty acids in traditional formula milk powder is quite different from that of breast milk fat, which is not conducive to the healthy growth of infants. Therefore, choosing a suitable infant formula is extremely important. However, 1,3-dioleic acid-2-palmitic acid triglyceride (OPO stru...

Claims

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Application Information

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IPC IPC(8): C12P7/64
CPCC12P7/6436
Inventor 毕艳兰程亚鹏宗蕾杨国龙孙尚德
Owner HENAN UNIVERSITY OF TECHNOLOGY
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