Method for preparing corn oil rich in medium-chain fatty acids with lipase membrane in a supercritical CO2 system
A medium-chain fatty acid, lipase membrane technology, used in edible oil/fat, application, bulk chemical production, etc., to improve activity and stability, reduce mass transfer resistance, and facilitate recovery and product production.
Active Publication Date: 2014-10-08
南宁市桂福园农业有限公司
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Problems solved by technology
[0005] In order to overcome the problem that there is no method for enzymatically synthesizing corn oil rich in caprylic acid glycerides under supercritical conditions using caprylic acid and corn oil, in order to adapt to the development of modern technology and meet the needs of the market, we propose an improved production Process:
Method used
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Experimental program
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Effect test
specific Embodiment approach 1
[0026] Specific implementation mode one: the steps of this implementation mode are as follows:
[0027] Step 1: Add octanoic acid and corn oil in a stainless steel autoclave in a molar ratio of 1:1 to 4:1, and simultaneously add a lipase film with a total mass of 1% to 6%, then add stirring magnetic beads, and add a small amount of water, Seal the autoclave with CO 2 Perform a leak test, then use CO 2 Replace the air in the stainless steel autoclave; after the replacement is completed, control the temperature at 32°C and fill it with CO 2 The pressure is 11MPa to ensure that the reaction process is in a supercritical state; after the collector type constant temperature heating magnetic stirrer is heated to a certain temperature, adjust a certain speed and react at a constant temperature for a period of time. After the reaction is over, cool the stainless steel autoclave to room temperature, release gas, open the autoclave, take out the fluid, and use a centrifuge to remove t...
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Corn oil is also called corn germ oil. The content of unsaturated fatty acids in the corn oil is over 80% and the unsaturated fatty acids mainly include linoleic acid and oleic acid, wherein the linoleic acid accounts for more than 50% of the total oil. The corn oil is rich in vitamin E, phospholipid and the like and is high-quality edible oil. Edible long or medium chain fatty acids in the food can reduce the weight and body fat content, promote energy consumption and the like. Fat accumulation in healthy bodies and the serum triglyceride level after dinner can be effectively reduced by using the medium chain fatty acids instead of the long chain fatty acids. The corn oil does not contain medium chain fatty acids; therefore octanoic acid and the corn oil are taken as the raw materials, the corn oil rich in medium chain fatty acids is synthesized by a lipase membrane method in the supercritical state and the content of the medium chain fatty acids with physiological activities in the obtained corn oil rich in medium chain fatty acids is 35.00%.
Description
Technical field: [0001] The invention relates to the field of edible oil processing, in particular to a method for preparing corn oil rich in medium-chain fatty acids by using carbon dioxide as a fluid to catalyze glycerolysis reaction with a lipase membrane in a supercritical system. Background technique: [0002] Corn oil is also called corn germ oil. Corn oil contains a lot of unsaturated fatty acids, and its composition is relatively neat, so the oil tastes good, light and refreshing, easy to digest and absorb, and the oil also contains a variety of vitamins and carotene, which can prevent the body from The special function of cholesterol deposition in serum, so the nutritional value of corn oil is higher. A large number of studies have shown that unsaturated fatty acids are essential fatty acids that cannot be synthesized in the human body. They can relieve excess cholesterol in the blood, enhance cell membrane permeability, and prevent myocardial tissue and arterioscle...
Claims
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IPC IPC(8): C12P7/64A23D9/04
CPCY02P20/54
Inventor 于殿宇王立琦梁单琼马丽娜孙贺张欢关忠江连洲孙丽雪赵丹丹李相昕葛洪如梁宝生刘晶
Owner 南宁市桂福园农业有限公司