Industrial production method of 1, 3-dioleic acid-2-palmitic acid triglyceride and product

A technology of palmitic acid triglyceride and a production method, applied in the field of oils and fats, can solve the problems of low OPO content, increased production costs, harmful substances, harsh conditions, etc., and achieves the effects of reducing workload, avoiding adverse effects, and reducing acyl transfer.

Active Publication Date: 2021-09-21
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production method is obtained by an acid hydrolysis reaction
The OPO content in the product obtained by one-time acid hydrolysis is relatively low, and the substrate ratio of the fatty acid and triglyceride ...

Method used

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  • Industrial production method of 1, 3-dioleic acid-2-palmitic acid triglyceride and product
  • Industrial production method of 1, 3-dioleic acid-2-palmitic acid triglyceride and product
  • Industrial production method of 1, 3-dioleic acid-2-palmitic acid triglyceride and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Establishment of enzymatic acid hydrolysis prediction model:

[0037] In the reaction system, the content of triglyceride is m, and the content of fatty acid is h. During the reaction, the lipase used is sn-1,3 position-specific lipase, and the fatty acid conforms to sn-1,3 position randomly distributed. In the whole reaction system, the types of fatty acids are defined as n types, different fatty acids are defined as Xi, and the reaction conditions are used to control the acyl transfer. The change of sn-2 fatty acid is small, so the change of sn-2 fatty acid can be ignored. In the system, the fatty acids involved in the reaction are mainly triglyceride sn-1,3 fatty acids and added free fatty acids. For a single fatty acid Xi, the molar percentage of Xi fatty acid on the sn-1,3 position of triglyceride can be expressed as Msn-1 / -3Xi, and the molar percentage of free fatty acid Xi can be expressed as MXi, therefore, when the system reaches the reaction equilibrium, Acc...

Embodiment 2

[0058] With palmitic acid content of 91.2%, sn-2 palmitic acid content of 84.4% palm stearin as starting material, high oleic sunflower oil fatty acid as acyl donor, sn-1, 3-position selective lipase As a catalyst, through the acid hydrolysis fatty acid equilibrium model, the fatty acid composition and distribution of the enzymatic hydrolysis products with different substrate ratios are calculated under reaction equilibrium.

[0059] Table 2. Fatty acid characteristics of palm stearin and high oleic sunflower oil

[0060] stearin High Oleic Sunflower Oil Fatty acid (mol%) total sn-2 sn-1,3 total C14:0 1.4 0.5 1.85 C16:0 91.2 84.4 94.6 3.8 C18:0 3.1 4.5 2.4 3.1 C18:1omega-9 3.6 8.8 1 84.8 C18:2ω-6 0.7 1.8 0.15 7.5 C18:3ω-3 0.4

[0061] Table 3. Theoretical equilibrium values ​​of sn-1,3 fatty acids and triglycerides in one acid hydrolysis

[0062]

[0063] From the above results, it can...

Embodiment 3

[0088] Palm stearin with a palmitic acid content of 82.4% and a sn-2 palmitic acid content of 73.5% was selected as a starting material to produce 1,3-dioleic acid-2- The fatty acid composition and distribution of palmitic acid triglyceride products, palm stearin and high oleic peanut oil are shown below.

[0089] Table 10. Fatty acid characteristics of palm stearin and high oleic peanut oil (%)

[0090]

[0091] Table 11. Theoretical equilibrium values ​​of sn-1,3 fatty acids and triglycerides in one acid hydrolysis

[0092]

[0093]

[0094] From the above results, it can be seen that with the increase of the substrate ratio, the content of sn-1,3 palmitic acid also decreases continuously, but the reduction range decreases. When the substrate ratio is greater than 10:1, the reduction of palmitic acid is less than 3%. Using the first enzymatic acid hydrolysis product as the substrate, and then using the same proportion of fatty acids for secondary acid hydrolysis, t...

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Abstract

The invention discloses an industrial production method of 1, 3-dioleic acid-2-palmitic acid triglyceride and a product. The method comprises the following steps of: predicting the minimum substrate ratio required by the reaction by establishing an enzymatic acidolysis reaction fatty acid balance model, and substituting palm stearin sn-1, 3 palmitic acid through one-step acidolysis by taking fatty acid from high-oleic-acid vegetable oil as an acyl donor; separating palmitic acid, glyceryl tripalmitate and part of glyceride by adopting low-temperature procedure fractionation to obtain liquid oil; and carrying out second-step acidolysis on the liquid oil, removing part of glyceride through lipase G50 after the reaction is finished, and removing fatty acid through reduced pressure distillation to obtain the product. According to the method, a model is established to predict the substrate ratio in the reaction process, the workload in the process optimization process is greatly reduced, the product obtained through two-step acidolysis coupled low-temperature procedure fractionation is less in free fatty acid use amount and lower in harmful substance generation amount, the production cost is greatly saved, and the method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of oils and fats, and in particular relates to an industrial production method of 1,3-dioleic acid-2-palmitic acid triglyceride and a product thereof. Background technique [0002] Breast milk is the best food for babies, it provides babies with various nutrients, including lipids, carbohydrates, proteins and other physiologically active substances. Fat in breast milk accounts for 3-5% of the total milk and provides more than 50% of the energy for the baby. Breast milk lipids are a very complex system, containing more than 200 fatty acids and numerous triglyceride types, and there are also a variety of complex lipids, including sterols, glycosphingolipids, and fat-soluble vitamins. The molecular type, content and configuration of breast milk lipids are crucial to the growth and development of infants, especially lipids with important physiological functions. [0003] The content of triglycerides in breast ...

Claims

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Application Information

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IPC IPC(8): C12P7/64
CPCC12P7/6454
Inventor 邹孝强徐林海晁仲昊
Owner JIANGNAN UNIV
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