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Synthesis and purification method of medium chain triglycerides

A medium-carbon chain triglyceride and purification method technology, applied in the field of preparation of high-purity medium-carbon chain triglyceride, can solve the problems of long reaction time, volatile solvent, solvent residue, etc., and achieve good catalytic effect and thermal stability Good sex, not easy to lose effect

Inactive Publication Date: 2005-03-16
JIANGNAN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-carrying agent method is simple to operate, but the water-carrying agent added is generally organic solvents such as cyclohexane, benzene, toluene, etc., which may easily cause solvent residues in the product, and the reaction time is longer than the vacuum method, and the color of the product is darker. May be due to oxidative polymerization or degradation of fatty acids in the presence of oxygen
Moreover, the solvent used in the water-based method is easily volatilized, causing environmental pollution.

Method used

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  • Synthesis and purification method of medium chain triglycerides

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Experimental program
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Effect test

Embodiment 1

[0014] The synthesis of embodiment 1. medium carbon chain glyceride

[0015] The increase in temperature is conducive to the rapid generation of triglycerides, so the temperature is set at the best level of esterification rate, that is, the starting temperature is 140°C and the final temperature is 160°C. That is to say, for the central combination design of three factors, three levels, and two indicators, the three factors selected are: acid-alcohol ratio, time, and absolute pressure, and the indicators are: esterification rate and MCT selectivity.

[0016] Factor: X1——acid-alcohol ratio (W / W), 3.1-3.3;

[0017] X2——time (min), 75-105;

[0018] X3——absolute pressure (×10 4 Pa), 0.8-1.2;

[0019] Index: Y1 - Esterification rate

[0020] Y2—Selectivity of MCT

[0021] factor

[0022] The experimental scheme and experimental results are shown in Table 2.

[0023]

[0024] According to the response surface analysis method, the optimal c...

Embodiment 2

[0025] Embodiment 2. Physical purification of medium carbon chain triglycerides

[0026] Nitrogen is used as stripping steam, which has a very good deacidification effect on MCT, and the acid value can be reduced to below 1. The best operating conditions are: pressure 300Pa, temperature 170°C, distillation time 80min. After alkali refining, MCT with an acid value of 0.5 and a purity of up to 85% can be obtained.

Embodiment 3

[0027] Embodiment 3. The three-stage molecular distillation purification of medium carbon chain triglyceride

[0028] Influence of Temperature of Primary Molecular Distillation on Acid Value and Yield of Heavy Phase

[0029] As the distillation temperature rises, the fatty acid molecules in the feed liquid gain energy and the molecular motion intensifies, which not only leads to the acceleration of molecular motion, but also increases the amount of fatty acid in the form of vapor, reduces the yield of heavy phase, and reduces the acid value, which is beneficial to Deacidification. But at the same time, the increase in temperature also accelerates the volatilization of monoglycerides and diglycerides in the oil, resulting in a decrease in the yield of glyceryl partial esters of medium carbonate. In order to better separate fatty acids and obtain more glycerin partial esters of medium carbonate, the flow rate is 1.2-1.6L / m 2h, the temperature is controlled at 110-115°C and the...

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Abstract

The invention provides a synthesis and purification method of medium chain triglycerides by using solidified phosphotungstic acid as catalyst, medium carbon chain C6-C12 fatty acid and glycerol as raw material for etherification reaction to synthesize the medium carbon chain glyceride, and a three stage molecule distillation purification is employed to obtain the high purity medium carbon chain triglycerides product.

Description

technical field [0001] A method for synthesizing and purifying medium-carbon chain triglycerides relates to the preparation of high-purity medium-carbon chain triglycerides. Background technique [0002] Medium-chain triglycerides are fatty acids with medium-carbon chain lengths (C 6 -C 12 ) triglycerides, abbreviated as MCT, is a colorless liquid with no irritating odor at room temperature, its viscosity is half that of ordinary vegetable oil, mainly including caprylic triglyceride, capric triglyceride and caprylic acid- Capric Triglyceride. In 1930, M. Powell made pure capric acid from coconut oil for the first time, synthesized capric triglyceride, and studied the nutritional function and physiological metabolism of MCT. Since then, MCT has been systematically and extensively studied. Its nutrition Its value and clinical application have also been generally recognized, and its medicinal value has been paid more and more attention by people, and its demand is increasing...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C67/54C07C69/18
Inventor 王兴国刘元法金青哲
Owner JIANGNAN UNIV
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