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Preparation method of low-calorie functional fat

A technology of structural fat and low heat, applied in the field of preparation of low heat structural fat, can solve the problem of low absorption and utilization rate

Active Publication Date: 2011-09-21
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the long carbon chain fatty acid stearic acid is located at the 1 and 3 positions of the glycerol skeleton, the absorption and utilization rate in the human body is very low.

Method used

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  • Preparation method of low-calorie functional fat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Accurately weigh 1.5118g of triglyceride butyrate and 2.9850g of methyl stearate in a 50mL round-bottomed flask, heat-melt and mix well, then add 0.3597g (8% based on substrate) Lipozyme RMIM, and immediately dissolve at 60°C Constant temperature water bath reduced pressure (0.01MP) rotation (80r / min) reaction 5h. Immediately after the reaction is finished, it is rapidly cooled with running water, dissolved in diethyl ether as a solvent, removed by high-speed centrifugation, and the solvent is removed by rotary evaporation to obtain a low-heat structured lipid.

[0027] It was detected that the conversion rate of methyl stearate was 63.9%, the content of LCSL in the product was 96.5% (wherein, the content of SSL was 68.0%, the content of LLS was 28.5%), and the content of LLL was 2.8%.

Embodiment 2

[0029] Accurately weigh 1.5118g of triglyceride butyrate and 2.9850g of methyl stearate in a 50mL round-bottomed flask, after hot melting and mixing, add 0.4497g (10% based on substrate) Lipozyme RMIM, immediately at 60°C Constant temperature water bath reduced pressure (0.01MP) rotation (80r / min) reaction 5h. Immediately after the reaction is finished, it is rapidly cooled with running water, dissolved in diethyl ether as a solvent, removed by high-speed centrifugation, and the solvent is removed by rotary evaporation to obtain a low-heat structured lipid.

[0030] It was detected that the conversion rate of methyl stearate was 91.5%, the LCSL content in the product was 94.6% (wherein, the SSL content was 48.6%, the LLS content was 46.0%), and the LLL content was 5.1%.

Embodiment 3

[0032] Accurately weigh 1.5118g of triglyceride butyrate and 2.9850g of methyl stearate in a 50mL round-bottomed flask, heat-melt and mix well, then add 0.3597g (8% based on substrate) Lipozyme RMIM, and immediately dissolve at 80°C Constant temperature water bath reduced pressure (0.01MP) rotation (80r / min) reaction 5h. Immediately after the reaction is finished, it is rapidly cooled with running water, dissolved in diethyl ether as a solvent, removed by high-speed centrifugation, and the solvent is removed by rotary evaporation to obtain a low-heat structured lipid.

[0033] It was detected that the conversion rate of methyl stearate was 60.9%, the yield of LCSL in the product was 89.4% (wherein, the content of SSL was 54.2%, the content of LLS was 35.2%), and the content of LLL was 9.9%.

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Abstract

The invention relates to a preparation method of low-calorie functional fat, belonging to the research field of functional lipid. The method comprises the following steps: tributyrin and methyl stearate are used as raw materials and 1,3-specific Lipozyme RMIM is used as catalyst to perform ester exchange reaction under the conditions of reduced pressure, heating and rotating, cooling, dissolving and centrifuging are performed after some time to remove enzyme, and rotary steaming is performed to obtain the low-calorie functional fat. The conversion rate of methyl stearate in the reaction product, the content of low-calorie functional fat (SSL and LLS) and the content of the unexpected product glycol tristearate are used as indexes and the factors such as reaction time, substrate molar ratio, the additive amount of enzyme and reaction temperature are optimized to determine the preparation technology. The method lays foundations for the regulations of the short carbon chains and long-carbon-chain fatty acid of triglyceride and the construction of the low-calorie functional fat processing technology which can meet different demands on processability.

Description

Technical field: [0001] The invention is a method for preparing a low-calorie structural lipid, which belongs to the field of functional lipid research Background technique: [0002] Low-calorie structural lipids (LCSL) are structural lipids formed by introducing short carbon chain fatty acids (C2-C4) and long carbon chain fatty acids (C16-C22) into the same triglyceride molecule. Generally, they include two categories: Triglycerides with two short carbon chains and one long carbon chain acyl group (SSL); triglycerides with two long carbon chains and one short carbon chain acyl group (LLS). Since the low-calorie structural fat replaces the corresponding long-chain fatty acid with a low-calorie short-chain fatty acid, the energy supply is greatly reduced. Studies have found that the heat of this type of structural fat is only that of ordinary edible oil (about 10kcal / g). Half of it, about 5kcal / g, has a good fat-lowering and weight-loss effect. [0003] The synthesis method...

Claims

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Application Information

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IPC IPC(8): C12P7/64
Inventor 黄健花韩露刘元法金青哲王兴国
Owner JIANGNAN UNIV
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