A kind of extraction method of citrus peel essential oil

Abstract

A method for extracting citrus peel essential oil, characterized in that, in proportion by weight, 99.04% to 99.26% of water, 0.1% to 0.2% of sodium benzoate, 0.5% to 0.8% of anhydrous calcium chloride, and 0.04% to 0.06% of sodium bisulfite % prepare hardening solution; then take 1 part of fresh orange peel and 4 parts of hardening solution according to the weight ratio, and mix evenly so that the orange peel is completely immersed in the hardening solution for 2 to 3 hours. After soaking, remove the orange peel from the hardening solution Take it out from the middle and squeeze it with a roller press. The obtained orange peel residue is used as animal feed directly or after drying. The mixture of orange oil and water obtained by squeezing is filtered through a 80-120 mesh filter, and then used in a pipeline-type high-speed centrifuge. The machine is separated at a speed of 18,000 rpm to 20,000 rpm, and the obtained water enters the sedimentation tank to allow large debris to settle, and the supernatant is returned to the citrus peel soaking pool as hardened water, and the obtained orange oil is heated at 3°C- Store at 8°C for more than 7 days, and get the citrus peel essential oil after filtering.

Description

technical field [0001] The invention relates to a method for extracting citrus peel essential oil, belonging to the field of natural fragrance oil. Background technique [0002] Citrus peel essential oil (or orange oil) is a kind of spice oil extracted from citrus peel. It has the characteristics of natural environmental protection and pleasant aroma. It is widely used in food, cosmetics and other industries. At the same time, as a non-toxic organic solvent, it is widely used in the chemical industry. Using citrus peel oil as the main raw material to make capsules or solvents and other bio-health products, it has the functions of "regulating qi and resolving phlegm, harmonizing the stomach and strengthening the spleen, dispelling stagnation and relieving pain, detoxifying and beautifying, digesting food and relieving alcohol". At the same time, limonene in citrus peel essential oil has a special effect on resolving gallstones in the human body and treating gastric cancer. ...

AI Technical Summary

Problems solved by technology

(2) At the same time, after the pectin becomes calcium pectate, it will not dissolve in water, which can reduce the viscosity of water, prevent the emulsification of water and oil, and affect the separation effect

[0012] Disadvantages of the lime soaking and squeezing method: due to the oil cells being immersed in the lye, a partial saponification reaction occurs, and at the same time, the citrus peel is prone to browning reaction under alkaline conditions, which makes the aroma of the oil significantly worse and the color darker. Oil quality dropped significantly

[0016] Disadvantages of the steam distillation method: First, this method has greater energy consumption than the pressing method

[0019] Through the comparison and analysis of the above three methods, it can be seen that the oil quality of the direct pressing method is good, but the yield is low.

Lime immersion pressing method and water steam method have a high oil yield. At present, most of the orange oil in the domestic market is extracted by this method, but the oil quality is poor.

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