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Method for preparing monolaurin

A technology of lauric acid glyceride and monodecanoic acid is applied in the field of preparation of mono-medium carbon chain fatty acid glyceride food additives, and can solve the problems of unreusable alcoholysis catalyst, low carbon chain fatty acid content, high energy consumption and production cost , to achieve the effect of reducing fat deposition, low melting point and reducing emissions

Inactive Publication Date: 2012-08-01
南昌香樟林高科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the single medium-chain fatty acid glyceride products sold in the domestic and foreign markets are mainly prepared from coconut oil and palm kernel oil by hydrolysis, esterification or alcoholysis. The catalysts are mainly liquid acid and alkali, solid acid and alkali , there are disadvantages such as low content of medium-carbon chain fatty acids in raw materials, alcoholysis catalysts that cannot be reused, large discharge of acid-base salts, large equipment investment, high energy consumption and production costs, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (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.

[0031] (2) Esterification and partial alcoholysis of camphor tree seed oil catalyzed by acidic ionic liquid

[0032] Take by weighing 100g camphor tree seed oil (acid value is 13.6), glycerol 27.6g in 500mL there-necked flask (alcohol-oil molar ratio 1.8: 1), and add acidic ionic liquid catalyst 1-methyl-3-( 3-sulfopropyl) imidazole p-toluenesulfonate ([HSO 3 -pmim] + [pTSA] - ) 3.5g, stirred and heated to raise the temperature, and the reaction time was 2h at 142°C, the acid value was reduced to 0.25, and the monoglyceride content was 24.8%. After centrifugation, the esterification and partial alcoholysis of the ...

Embodiment 2

[0040] (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.

[0041] (2) Esterification and partial alcoholysis of camphor tree seed oil catalyzed by acidic ionic liquid

[0042] Take by weighing 100g camphor tree seed oil (acid value is 13.6), glycerol 38.3g in 500mL there-necked flask (alcohol-oil molar ratio 2.5: 1), and add acidic ionic liquid catalyst 1-methyl-3-( 3-sulfopropyl) imidazole p-toluenesulfonate ([HSO 3 -pmim] + [pTSA] - ) 4.0g, stirred and heated to raise the temperature, the reaction time was 2h at 145°C, the acid value was reduced to 0.21, and the monoglyceride content was 28.5%. After centrifugation, the esterification and partial alcoholysis of the camp...

Embodiment 3

[0050] (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.

[0051] (2) Esterification and partial alcoholysis of camphor tree seed oil catalyzed by acidic ionic liquid

[0052] Take by weighing 100g camphor tree seed oil (acid value is 13.6), glycerol 23.0g in 500mL there-necked flask (alcohol-oil molar ratio 1.5: 1), and add acidic ionic liquid catalyst 1-methyl-3-( 3-sulfopropyl) imidazole p-toluenesulfonate ([HSO 3 -pmim] + [pTSA] - ) 4.0g, stirred and heated to raise the temperature, the reaction time was 2.5h at 135°C, the acid value was reduced to 0.28, and the monoglyceride content was 23.5%. After centrifugation, the esterification and partial alcoholysis of the ca...

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PUM

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Abstract

The invention discloses a method for preparing monolaurin, which comprises the following steps: taking camphor tree seed oil as a raw material; adding degumed and dehydrated camphor tree seed oil into an esterification and alcoholysis reactor, and adding acidic ionic liquid 1-methyl-3-(3-sulfopropyl) imidazole catalyst to reacting at the temperature of between 135 and 145 DEG C until the acid value is reduced to below 0.5, wherein the temperature the dosage of the catalyst is 3 to 4 percent of the weight of the oil and the molar ratio of the alcohol to the oil is 1.5-2.5:1; performing centrifugal separation, adding the esterified and alcoholized amphor tree seed oil into a catalysis and alcoholysis reactor, and adding the alkaline ionic liquid of 1-butyl-3-methyl imidazole salt to react at the temperature of between 165 and 175 DEG C until the total content of the monofatty glyceride is over 90.0 percent, wherein the dosage of the catalyst is 0.4 to 0.6 percent of the weight of the oil and the molar ratio of the alcohol to the oil is 6-7:1; performing centrifugal separation, washing with the water at the temperature of between 15 and 35 DEG C; and performing vacuum dehydration anddecoloration. The monofatty glyceride content in the product is over 90.0 percent; the monolaurin content is over 85.0 percent; and the process of molecular distillation can be saved. The technology is reasonable, energy-saving and environment-friendly; and most of the glycerol can be recycled, and the discharge of acid, alkali and salt is greatly reduced.

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] Monoglycerides of monoglycerides (referred to as monoglycerides, monoglyceride, MG) mainly include single long-chain fatty acid glycerides (the number of fatty acid carbon atoms is equal to or greater than 14) and single medium-chain fatty acid glycerides (the number of fatty acid carbon atoms is 8 To 12), with lipophilic and hydrophilic groups, is a polyol type nonionic surfactant. Mono-long-chain fatty acid glycerides only have emulsifying effect, and are mainly used as emulsifiers for food, health care products and medicines, cosmetics and detergent surfactants. Single medium-chain fatty acid glycerides, good dispersibility and hydrophilicity in water, strong emulsifying ability, good inhibitory effect on bacteria and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/06
Inventor 曾哲灵万冬满彭超罗春燕
Owner 南昌香樟林高科技有限公司
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