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Preparation method for fatty glyceride

A technology of fatty acid glycerides and fatty acids, which is applied in the field of preparation of fatty acid glycerides, can solve problems such as low yield, affecting yield, and reducing product quality, and achieve the effects of high production capacity, increased production capacity, and improved quality

Inactive Publication Date: 2015-04-01
青岛澳海生物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this method produces monoacylglycerides and diacylglycerides, free fatty acids will be produced as by-products, and the yield is low
2. Lipase catalyzes the dehydration reaction of fatty acids and glycerol to synthesize glyceride products. This method is widely used. It is the method for the preparation of conjugated linoleic acid glycerides announced by the Ministry of Health. Although it has some advantages, such as Substrate requirements are not strict, reaction conditions are mild, specificity, etc., but its defects are obvious, such as lipase is expensive, and the reaction cycle is too long, which has always affected its large-scale production
The production of glycerides by transesterification will introduce components in the original glycerides. For example, this patent introduces acetic acid molecules, and there will be residues of acetic acid molecules in the product, which will reduce product quality.
4. U.S. Patent (Patent No. 6124486) mentions that fatty acid soap is used as a catalyst at 200-260°C to react fatty acid with glyceryl triacetate to synthesize glycerides. Due to the high temperature, this method will crack unsaturated fatty acids and affect Yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing fatty acid glycerides, comprising the following steps: adding 1000 g of methyl stearate to a reaction flask, adding glycerin at a molar ratio of methyl stearate to glycerin of 8:10, heating to 120° C., and Under the condition of vacuum degree of 8000pa, vacuumize for 1h, add 6% sodium ethoxide solid catalyst with the total weight of the material, and immediately vacuumize the reaction. Wash once with 2.5% citric acid aqueous solution, and the added amount is added according to the molar ratio of sodium ethylate to citric acid 1:1.

[0019] After standing to separate the layers, the upper layer oil was separated and washed three times with water at 85°C, then heated and decompressed to remove water.

[0020] Under the conditions of 190°C and vacuum degree of 15pa, unreacted methyl stearate and stearic acid were removed by molecular distillation, and its indicators were tested according to the method in GB15612-1995. The results are shown in the fol...

Embodiment 2

[0023] A method for preparing fatty acid glycerides, comprising the following steps: adding 1000 g of methyl linoleate to a reaction flask, adding glycerin at a molar ratio of methyl linoleate to glycerin of 2:0.8, heating to 120° C., and Vacuumize for 30 minutes under the condition of vacuum degree of 7000pa, add 2% sodium methoxide based on the weight of methyl linoleate, and immediately perform vacuum reaction until the vacuum degree drops to 700pa, continue the reaction for 1 hour, stop the reaction and cool down to 96°C. Add 2kg of hot water at 95°C, stir evenly, let stand to separate layers, separate the upper layer of oil, wash with hot water at 95°C for 3 times, heat and decompress to remove moisture.

[0024] Under the conditions of 190°C and vacuum degree of 15pa, unreacted methyl linoleate was removed by molecular distillation to obtain linoleic acid diglyceride oil. The test results are shown in the following table.

[0025] Test items

Embodiment 3

[0027] A method for preparing fatty acid glycerides, comprising the following steps: adding 80 kg of ethyl linoleate to a reactor, adding glycerin at a molar ratio of ethyl linoleate to glycerin of 2:1, heating to 140° C., Vacuumize for 30 minutes under the condition of vacuum degree of 8500pa, add 1% sodium ethylate by weight of ethyl linoleate, and immediately perform vacuum reaction, the vacuum degree will drop slowly from one atmospheric pressure until the vacuum degree drops to 650pa, and then continue to react for 1 hour , stop the reaction and lower the temperature to 94°C. Add 160kg of hot water at 95°C, stir evenly, let stand to separate layers, separate the upper layer of oil, wash with hot water at 95°C for 3 times, heat and reduce pressure to remove water.

[0028] Under the conditions of 190°C and vacuum degree of 15pa, unreacted ethyl linoleate was removed by molecular distillation to obtain linoleic acid diglyceride. The test results are shown in the table below...

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PUM

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Abstract

The invention relates to the fields of food, chemical engineering, medicines and the like, and particularly relates to a preparation method of fatty glyceride. The preparation method of the fatty glyceride comprises the following steps: mixing fatty acid low alcohol ester with glycerol in a molar ratio of 1:2 to 6:1 by taking low alcohol sodium or low alcohol potassium as a catalyst, and reacting for 1-60 hours in vacuum at 100-170 DEG C, thereby obtaining a glyceride crude product; and processing and treating the glyceride crude product subsequently, thereby preparing the corresponding product. The preparation method for fatty glyceride disclosed by the invention can be used for preparing a mixture of monooleoyl glycerol, diacyl glycerol and triglyceride, and has an obvious effect in increasing the yield and improving the product quality.

Description

technical field [0001] The technology of the invention relates to the fields of food, chemical industry, medicine and the like, and specifically relates to a preparation method of fatty acid glycerides. Background technique [0002] Glyceride products are a mixture mainly composed of monoglycerides, diglycerides and triglycerides, which are widely used in food, chemical and pharmaceutical fields. For example: 1) The Ministry of Health of the People's Republic of China announced that diglyceride oil is a new resource food in Announcement No. 12 in 2008, and its ingredients include diglyceride ≥ 40%, triglyceride ≤ 58%, monoglyceride ≤ 1.5%, free fatty acid ≤0.5%. As a new type of healthy oil, diglyceride oil is recognized as a generally recognized safe substance in the United States, approved as a specific health food in Japan, passed the new food safety certification in Canada, and recognized as a new food in Australia, New Zealand, and the European Union. food. Diglyceri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/02C11C3/06C07C67/03C07C69/30C07C69/587
CPCC11C3/02C07C67/03C11C3/06C07C69/30C07C69/587
Inventor 沈俊平刘发义
Owner 青岛澳海生物有限公司
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