New method for preparation of plant oil fatty acid ethyl ester

Abstract

The invention relates to a new method for preparation of plant oil fatty acid ethyl ester, wherein the method comprises the following steps: (1) taking plant oil, and preheating the plant oil to 65-75 DEG C; (2) taking KOH, putting the KOH into absolute ethyl alcohol, and making the KOH completely dissolved in the absolute ethyl alcohol by ultrasonic treatment, to obtain a KOH ethyl alcohol solution; (3) mixing the preheated plant oil with the KOH ethyl alcohol solution, then connecting to a hydrodynamic cavitation device, and carrying out a circular reaction for 10-30 min under a condition of the temperature of 65-75 DEG C; and (4) after the end of the reaction, adjusting the pH value of the product to neutral, and carrying out rotary evaporation for 25-35 min under a condition of the temperature of 65-75 DEG C, to obtain the plant oil fatty acid ethyl ester. With the plant oil as the main raw material, and with use of the hydrodynamic cavitation technology, the fatty acid ethyl ester is prepared, the preparation effect is good, and the method has the advantages of convenience in use, low cost and less investment, and can effectively improve the reaction rate, shorten the reaction time and reduce energy consumption.

Description

technical field [0001] The invention relates to a new method for preparing vegetable oil fatty acid ethyl ester. Background technique [0002] Fatty acid ethyl ester is produced by the reaction of ethanol and oil, that is, ethyl ester biodiesel. As a substitute for petroleum diesel, biodiesel is a kind of energy produced from various oils and fats, and is a typical "green energy" at present, bringing hope to the contemporary society where energy is beginning to be in short supply. Moreover, compared with traditional petroleum diesel, biodiesel is biodegradable and has less pollution to the environment, especially the emission of carbon dioxide, sulfide, dust and other pollutants is relatively low, so vigorous research and development of biodiesel is of great significance. significant. [0003] At present, the commonly used method of fatty acid ethyl ester is the stirring method, and the reaction speed is easily affected by the stirring speed. When the output is large and t...

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Problems solved by technology

[0003] At present, the commonly used method of fatty acid ethyl ester is the stirring method, and the reaction speed is easily affected by the stirring speed. When the output is large and the reaction vessel is large, local uneven mixing is prone to occur during the stirring process, resulting in a decrease in the reaction rate, which affects industrialization. , Scale-up process

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