Method of preparing single-capric lauric glyceride through step-by-step catalysis of camphor tree seed oil with acid and base

A technology of lauric acid glyceride and camphor tree seed oil is applied in the field of preparation of single-medium-chain fatty acid glyceride food additives, can solve the problems of low reaction rate, long reaction time and the like, achieves low melting point, good bacteriostatic effect, Strong emulsification effect

Inactive Publication Date: 2010-06-23
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The acid-catalyzed esterification and alcoholysis method can catalyze the esterification reaction of free medium-chain fatty acids and glycerin to produce single-medium-chain fatty acid glycerides, two-medium-chain fatty acid glycerides, and three-medium-chain fatty acid glycerides and glycerol. Single-medium-chain fatty acid glycerides are suitable for various acid value raw material oils; but the content of single-medium-carbon fatty acid glycerides in the product is only 40-60%, and the reaction rate is low and the reaction time is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Degumming and dehydrating camphor tree seed crude oil. After stirring and heating to 65°C, add phosphoric acid (concentration: 85%) with 0.1% oil weight and 65°C water with 10% oil weight while stirring, continue stirring for 15 minutes, stop stirring and let stand for 10 minutes. After that, it was centrifuged and dehydrated under reduced pressure.

[0028] (2) Acid-catalyzed esterification and partial alcoholysis of camphor tree seed oil

[0029] Weigh 100g of camphor tree seed oil (acid value is 13.6), 30.6g of glycerin in a 500mL three-necked flask (alcohol to oil molar ratio 2:1), and add 3g of sulfuric acid according to 3% of oil weight, stir and heat up, and react at 130°C After 2 hours, the acid value dropped to 0.55, and then centrifuged. The lower layer is the acid catalyst and glycerin, after alkali neutralization and vacuum dehydration, return to the 500mL three-neck flask for esterification and alcoholysis for repeated use. The upper layer is esterif...

Embodiment 2

[0036] (1) Degumming and dehydrating camphor tree seed crude oil. After stirring and heating to 65°C, add phosphoric acid (concentration: 85%) with 0.1% oil weight and 65°C water with 10% oil weight while stirring, continue stirring for 15 minutes, stop stirring and let stand for 10 minutes. After that, it was centrifuged and dehydrated under reduced pressure.

[0037] (2) Acid-catalyzed esterification and partial alcoholysis of camphor tree seed oil

[0038] Weigh 100g of camphor tree seed oil (acid value is 13.6), 45.6g of glycerin in a 500mL three-necked flask (molar ratio of alcohol to oil is 3:1), and add 4g of phosphoric acid according to 4% of oil weight, stir and heat up, and react at 135°C After 2.5 hours, the acid value dropped to 0.48, and then centrifuged. The lower layer is the acid catalyst and glycerin, after alkali neutralization and vacuum dehydration, return to the 500mL three-neck flask for esterification and alcoholysis for repeated use. The upper layer ...

Embodiment 3

[0045] (1) Degumming and dehydrating camphor tree seed crude oil. After stirring and heating to 65°C, add phosphoric acid (concentration: 85%) with 0.1% oil weight and 65°C water with 10% oil weight while stirring, continue stirring for 15 minutes, stop stirring and let stand for 10 minutes. After that, it was centrifuged and dehydrated under reduced pressure.

[0046] (2) Acid catalyst catalyzes esterification and partial alcoholysis of camphor tree seed oil

[0047] Weigh 100g of camphor tree seed oil (acid value is 13.6), 37.5g of glycerin in a 500mL three-necked flask (alcohol to oil molar ratio 2.5:1), and add 4.5g of p-toluenesulfonic acid according to the oil weight 4.5%, stir and heat up , the reaction time was 2.5h at 140°C, and the acid value dropped to 0.35. Then centrifuge. The lower layer is the acid catalyst and glycerin, after alkali neutralization and vacuum dehydration, return to the 500mL three-neck flask for esterification and alcoholysis for repeated use...

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PUM

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Abstract

The invention relates to a method of preparing single-capric lauric glyceride through step-by-step catalysis of camphor tree seed oil with acid and base, which comprises the following steps: degumming and dehydrating crude oil made from camphor tree seeds, adding the degummed and dehydrated oil into an esterification and alcoholysis reactor, adding an acid catalyst, and centrifugalizing when the acid value is reduced to be below 0.8 in reaction under the reaction conditions that the temperature is 130-140 DEG C, the amount of the consumed catalyst is 2-4 percent of the oil weight, the molar ratio of methanol to oil is 2:1 to 3:1; adding the reactants into an alcoholysis reactor, adding an alkali catalyst, and centrifugalizing when the total content of fatty acid monoglyceride reaches above 80.0 percent under the reaction conditions that the reaction temperature is 165-175 DEG C, the amount consumed catalyst is -.5-0.7 percent of the oil weight and the molar ratio of methanol to oil is 4:1 to 5:1; and spraying cold water at a temperature of 15-35 DEG C, mixing, washing, centrifugalizing, repeating the steps twice and finally dehydrating under a vacuum condition. The invention can effectively utilize the free medium-carbon-chain fatty acid in raw materials, and achieve high reaction efficiency. The fatty acid monoglyceride in the products can reach above 80.0 percent, and the content of the single-capric lauric glyceride can reach above 75.0 percent. Moreover, the invention has the advantages of reasonable process, energy conservation and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of a single medium-chain fatty acid glyceride food additive (glyceryl monocaplaurate). Background technique [0002] Single medium-chain fatty acid glycerides, good dispersibility and hydrophilicity in water, strong emulsifying ability, good inhibitory effect on bacteria and mold, stronger emulsifying ability than single-long-chain fatty acid glycerides, and better antiseptic performance than organic acids Its salt preservatives and paraben ester preservatives are emulsifiers and preservatives with excellent performance, which can be used not only as emulsifiers for food, health care products and medicines, but also as food, health care products and medicines. Preservatives, can also be used as surfactants in high-end cosmetics and detergents. [0003] At present, the single-medium-carbon chain fatty acid glyceride products sold on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/30C07C67/03
Inventor 曾哲灵万冬满彭超罗春燕
Owner NANCHANG UNIV
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