Method for extracting nervonic acid from oil of Mono Maple by using technique of molecular distillation
A technology of molecular distillation and ingot maple, which is applied in the field of fatty acid preparation technology, can solve the problems of high acid value of the product, easy emulsification of the product after washing, and low product purity, and achieve the effect of high purity, easy operation, and low boiling point
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[0026] Example 1:
[0027] (1) The preparation of Acer truncatum oil:
[0028] (1) Shelling: Controlling the moisture content of Acer truncatum seeds within the range of 8-12%, entering into a special shelling machine for Acer truncatum seeds for peeling treatment, and separating the shell kernels by winnowing to obtain Acer truncatum seeds.
[0029] (2) Oil extraction: The peeled and separated Acer truncatum kernels are subjected to moisture adjustment to control the moisture content in the range of 8-10%. The oil is extracted with a 90-type press, and the oil yield is over 85%.
[0030] (2) Preparation of ethyl nervate:
[0031] (1) Pretreatment: filter the crude oil of Acer truncatum to remove impurities, add a 5% sodium hydroxide solution at a concentration of 0.8% by weight of Acer truncatum oil, the reaction temperature is 50℃, the stirring speed is 40r / min, and the time is After the reaction is completed, the temperature is rapidly increased to 80°C at a rate of 1°C / hour af...
Example Embodiment
[0035] Example 2:
[0036] (1) Preparation of Acer truncatum oil: the same as in Example 1.
[0037] (2) Preparation of ethyl nervate:
[0038] (1) Pretreatment: Filter crude oil of Acer truncatum to remove impurities, add 4% sodium hydroxide solution at a concentration of 1.0% by weight of Acer truncatum oil, reaction temperature is 40℃, stirring speed is 30r / min, time is After 60 minutes, the reaction is completed and the temperature is increased to 80°C at a rate of 1°C / hour, and the temperature is kept standing for 6 hours to completely separate the soap nuggets, remove the oily feet, wash with water 3 times, and then remove the water.
[0039] (2) Ethylification: Mix 100 parts by weight of Acer truncatum oil, 50 parts by weight of absolute ethanol and 1.2 parts by weight of alkaline catalyst potassium hydroxide, and then perform esterification reaction, and react 2 at a temperature of 75°C After the reaction, wash 3 times with water to remove glycerin, alkali, and excess etha...
Example Embodiment
[0042] Example 3:
[0043] (1) Preparation of Acer truncatum oil: the same as in Example 1.
[0044] (2) Preparation of ethyl nervate:
[0045] (1) Pretreatment: Filter the crude oil of Acer truncatum to remove impurities, and add a 6% sodium hydroxide solution based on 0.5% of the weight of Acer truncatum oil by adding alkali. The reaction temperature is 30°C, the stirring speed is 60r / min, and the time is 60min, after the reaction is completed, the temperature is rapidly increased to 80°C at a rate of 1°C / hour, and the temperature is kept standing for 8 hours to completely separate the soap particles, remove the oily feet and wash twice with water, and then remove the water.
[0046] (2) Ethylification: Mix 100 parts by weight of Acer truncatum oil with 60 parts by weight of absolute ethanol and 1.5 parts by weight of alkaline catalyst potassium hydroxide, then perform esterification reaction, and react 3 at 80°C After the reaction, wash twice with water to remove glycerin, alka...
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