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A kind of preparation method of mixed ester rich in OPO structural lipid

A technology for mixed esters and structural fats, which is applied in the field of preparation of mixed esters, can solve the problems of less source of oil and fat raw materials, increased production processes, untraceable sources, etc., and achieves the effect of shortening the process flow and improving the safety.

Active Publication Date: 2020-07-28
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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  • A kind of preparation method of mixed ester rich in OPO structural lipid
  • A kind of preparation method of mixed ester rich in OPO structural lipid
  • A kind of preparation method of mixed ester rich in OPO structural lipid

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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 esters rich in OPO structural lipids, which belongs to the technical field of organic synthesis. The preparation method provided by the invention uses high oleic peanut oil as a raw material and obtains fatty acid ethyl esters through alcoholysis or medium-pressure hydrolysis Or fatty acid directly synthesizes mixed ester rich in OPO structural lipid with palm stearin under the catalysis of enzyme, which reduces the purification steps of oleic acid, shortens the process flow and improves the safety of the product. The data of embodiment shows, the present invention adopts fatty acid ethyl ester / fatty acid and palm stearin to be rich in OPO content in the mixed ester of OPO structural fat that makes content and the remaining palmitic triglyceride content are 46.35% / 44.17%, 60.73% / 57.60%, 5.67% / 4.07%, respectively, and the product indicators all meet the requirements of the national standard GB 30604‑2015.

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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Patent Type & Authority Patents(China)
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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