Extraction method of orange peel essential oil

Abstract

The invention relates to an extraction method of essential oil from citrus peel, the extraction method is characterized in that hardening liquid is prepared by taking 99.04 percent to 99.26 percent of water, 0.1 percent to 0.2 percent of sodium benzoate, 0.5 percent to 0.8 percent of calcium chloride anhydrous and 0.04 percent to 0.06 percent of sodium bisulfite; 1 part of fresh citrus peel and 4 parts of the hardening liquid are further taken according to the proportion by weight, the even mixing is carried out to allow the citrus peel to be fully submerged in the hardening liquid, the time is 2 to 3 hours, the citrus peel is fished out from the hardening liquid after the completion of the soaking and crushed by using a roller crusher, the obtained citrus peel residues are directly or indirectly used as animal feeds after the drying, the mixed liquid of citrus oil and water which is obtained by crushing is filtered by using a filter net with 80 to 120 meshes, then a pipeline type high-speed centrifuge is used for separation under the rotation speed of 18000 turns / min to 20000 turns / min, the obtained water enters a sedimentation tank, big scraps are carried out the sedimentation, supernatant liquid is returned to a soaking tank of the citrus peel as hardening water, the obtained citrus oil is stored for more than 7 days at 3 DEG C to 8 DEG C, and the essential oil from the citrus peel is obtained after the filtration.

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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