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Process for biotransformation of fat into ascorbic acid fatty acid ester

A technology of ascorbic acid and fatty acid ester, applied in the field of organic synthesis of biocatalysis, can solve problems such as low equilibrium conversion rate, lack of equilibrium moving driving force, etc., and achieve the effect of improving conversion rate

Inactive Publication Date: 2008-12-10
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The results show that the reaction can proceed, but the equilibrium conversion rate is not high due to the lack of sufficient equilibrium moving driving force

Method used

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Embodiment Construction

[0028] The following example will specifically illustrate the operation method of the present invention, but can not be used as the limitation of the present invention.

[0029] 20g of hydrogenated palm oil and 1g of Novozym435 were added to 100g of absolute ethanol to form a mixture, and then reacted at 55°C for 48hr under constant stirring. After the reaction was over, the liquid reaction mixture was separated from the solid enzyme, and cooled to room temperature to stand for stratification, then the cooled mixture was moved into a separatory funnel, and 1.8 g of glycerin was separated; the ethanol solution of the fatty acid ethyl ester of the upper layer was poured again into a reaction vessel containing solid enzyme, and then add 13.2 g of L-ascorbic acid to form a new mixture, and then react at 55° C. for 8 hours under constant stirring. Then turn on the vacuum pump, depressurize the reaction system, so that the ethanol is distilled off, continue to maintain the reaction ...

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Abstract

The invention discloses a process for synthesizing ascorbyl fatty acid ester, which starts from natural raw materials, is carried out by a biocatalytic mode, is relatively cheap, has high yield, and is environment-friendly. The process, under the catalysis of a biocatalyst (such as Novozym 435), takes alcohol as a medium and combines a fat alcoholysis reaction between fat and the alcohol with an ester exchange reaction between ascorbic acid and fatty acid ethyl ester together to realize the transformation of the fat to the ascorbyl fatty acid ester, which completely roots out the pollution threat of the prior chemical production technology to the environment, remarkably improves the yield and the purity of a product, and has a byproduct, namely pure glycerol. The process consists of the following methods: the fat and the alcohol react at a temperature of between 55 and 60 DEG C under the catalysis of enzyme, and the produced glycerol is recovered and removed; then the ascorbic acid is added, the fatty acid ethyl ester and the ascorbic acid react at a temperature of between 55 and 60 DEG C under the catalysis of the enzyme, and the produced alcohol is recovered and removed to produce the ascorbyl fatty acid ester.

Description

technical field [0001] This patent relates to a process for biologically converting fat into ascorbic acid fatty acid ester, which belongs to the technical field of biocatalytic organic synthesis. Background technique [0002] Fatty acid esters of ascorbic acid, including L-ascorbyl-6-O-laurate, L-ascorbyl-6-O-myristate, L-ascorbyl-6-O-palmitate, and L-ascorbyl-6-O- Stearate, etc., are known to be effective antioxidants in high-fat foods such as nuts, potato chips, mayonnaise, margarine, and fried snack foods. Also, some salts of these esters can be used as surfactants in foods. In addition, as the fat-soluble form of vitamin C, ascorbic acid fatty acid esters have also attracted extensive interest due to their fat-soluble characteristics. Because they can easily pass through the cell membrane and the blood-brain barrier, they have many properties that vitamin C does not have. They are easily absorbed by cells and accumulate in the cells. They can reach tissues and organs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P17/04
Inventor 汤鲁宏姜瑞霞
Owner JIANGNAN UNIV
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