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Method for separating and extracting hexadecenoic acid from grease

A technology of hexadecenoic acid and grease, which is applied in the field of separation and purification of hexadecenoic acid, can solve the problems of equipment, high technical requirements, complex process, etc., and achieve the effect of simple method, low energy consumption and convenient operation

Inactive Publication Date: 2018-09-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above documents involve the urea inclusion method, they all need to carry out molecular distillation again, the process is complicated, and the equipment and technical requirements are high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) transesterification of seabuckthorn fruit oil: using a conventional alkali-catalyzed method, the seabuckthorn fruit oil and methanol are subjected to transesterification to obtain fatty acid methyl esters. The specific steps are as follows:

[0031] Accurately weigh 150g of seabuckthorn fruit oil sample and place it in a three-necked flask for preheating, then add methanol solution of sodium hydroxide, the quality of methanol accounts for 60% (90g) of the quality of seabuckthorn fruit oil, and the quality of sodium hydroxide accounts for 60% (90g) of the quality of seabuckthorn fruit oil. 4% (6g) of 4% (6g), after reflux reaction at 64°C for 2h, evaporated to remove methanol, left to separate layers, the methyl ester phase was washed with water to be neutral, and dried to obtain fatty acid methyl ester, the content of hexadecenoic acid methyl ester was 24.5%;

[0032] 2) The obtained fatty acid methyl ester was subjected to high-temperature and high-vacuum rectificat...

Embodiment 2

[0039] 1) Transesterification of macadamia nut seed oil: Esterification and transesterification of macadamia nut seed oil samples were carried out using a conventional supercritical method to obtain fatty acid methyl esters. The specific steps are as follows:

[0040]Weigh 200g of macadamia nut seed oil and methanol, wherein the mass ratio of alcohol to oil is 42:1, mix methanol and macadamia nut seed oil fully with a magnetic stirrer, and then put the mixture into the reactor through a high-pressure liquid pump In the process, at a temperature of 300°C and a pressure of 11MPa, the magnetic stirrer kept stirring at a constant speed of 160r / min, so that the methanol was transesterified in the supercritical state to obtain fatty acid methyl esters;

[0041] 2) the obtained 190g fatty acid methyl ester is carried out rectification under reduced pressure, and reflux ratio is 4, and tower top pressure is 0.4kPa, obtains hexadecenoic acid methyl ester crude product, mass concentratio...

Embodiment 3

[0048] 1) Tung oil transesterification: adopt conventional alkali-catalyzed method, carry out transesterification reaction with tung oil and ethanol, obtain fatty acid ethyl ester, concrete steps are as follows:

[0049] Accurately weigh the 100g tung oil sample and place it in a three-necked flask for preheating, then add the ethanol solution of potassium hydroxide, the ethanol quality accounts for 40% (40g) of the tung oil quality, and the potassium hydroxide quality accounts for 2% (2g) of the tung oil quality ), after reflux reaction at 10°C for 15 hours, evaporate to remove ethanol, stand to separate and separate, the ethyl ester phase is washed with water and becomes neutral, and dried to obtain fatty acid ethyl ester, the content of ethyl hexadecenoate is 24.5%;

[0050] 2) subjecting the fatty acid ethyl ester obtained to high-temperature and high-vacuum rectification, with a reflux ratio of 0.2, a tower top pressure of 50 Pa, and a tower kettle temperature of 120° C., ...

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PUM

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Abstract

The invention discloses a method for separating and extracting hexadecenoic acid from grease. The method includes the following steps of conducting esterification and ester exchange to obtain mixed aliphatic ester, conducting high-temperature high-vacuum rectification to remove most of stearate, oleate, linoleic acid ester, linolenic acid ethyl ester and the like to obtain coarse hexadecenoic acid, conducting saponification and acidification to obtain fatty acid, mixing the fatty acid with urea and lower alcohol, conducting mixing backflow dissolution, cooling crystallization clathration and suction filtration to obtain filtrate, removing lower alcohol in the filtrate to obtain the high-content hexadecenoic acid. The method is simple, convenient to operate and friendly to the environment,and the obtained hexadecenoic acid is high in purity, good in quality and convenient to produce on a large scale.

Description

technical field [0001] The invention specifically relates to a method for separating and purifying hexadecenoic acid from oil. Background technique [0002] Hexadecenoic acid is a monounsaturated fatty acid with a double bond at the seventh carbon atom at the carbon end. Both its free state and lipids have good physiological activities for humans. In nutrition and medicine, hexadecenoic acid can reduce the level of C-reactive protein (CRP), reduce inflammation, reduce the risk of heart disease and stroke; increase the fluidity of cell membranes, and reduce low-density lipoprotein cholesterol (LDL) in the blood ) content, reduce blood vessel blockage caused by atherosclerotic plaque formation, thereby preventing arrhythmia and reducing high blood pressure. In addition, hexadecenoic acid has been proven to improve the sensitivity of the human body to insulin, and is effective for diabetes and metabolic syndrome without obvious side effects. In industry, hexadecenoic acid ca...

Claims

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Application Information

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IPC IPC(8): C07C51/493C07C51/487C07C51/42C07C57/03
CPCC07C51/42C07C51/487C07C51/493C07C57/03
Inventor 刘学军姚静雯计建炳俞云良
Owner ZHEJIANG UNIV OF TECH
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