Method for extracting essential oil from cypress leaves

Abstract

The invention discloses a method for extracting essential oil from cypress leaves. The method comprises the following steps of (1) collecting materials; (2) preprocessing the materials; (3), extracting; (4) condensing and recovering; (5) drying and removing moisture; and (6) bottling to store. By adopting the method, a common domestic micro-wave oven is taken as a micro-wave radiation source; a negative pressure extraction technology is added; the fresh leaves are taken as raw materials; complicated raw material treatment is not needed; any solvent is not added; and the micro-wave is absorbed by the moisture of the material and the material is heated and extracted, so as to achieve the negative pressure distillation and extraction effects of the micro-wave. Compared with the traditional steam distillation method, the method has the advantages that consumption of energy is greatly reduced; the extraction time is shortened; the extraction yield is improved; and waste liquid outflow is avoided. The yield of the essential oil of the cypress leaves extracted by the method can be up to be over 0.5% while the time is just 3-5 minutes; no environmental pollution is generated; and the method is an efficient, energy-saving and environment-friendly extraction mode.

Description

technical field [0001] The invention belongs to the technical field of chemistry and relates to a method for extracting volatile oil from cypress leaves. Background technique [0002] Most leaves of Cupressaceae plants contain volatile oil. Among them, the most common and resource-rich cypress plants are mainly arborvitae and juniper. Platycladus orientalis is a plant of the genus Arborvitae, also known as cypress and cedar. It is widely distributed in China, from Inner Mongolia and Jilin in the north to Guangdong and northern Guangxi in the south. Its artificial cultivation range is all over the country and its resources are very rich. Arborvitae leaves are fragrant and refreshing, with a bitter, slightly pungent taste. Volatile oil is the main active ingredient of Arborvitae leaves, and its main ingredient is α-pinene, which can be widely used in the preparation of deodorants, air fresheners and daily cosmetics. Traditional Chinese medicine believes that the oil of orie...

AI Technical Summary

Problems solved by technology

The traditional steam distillation method is the most common extraction method to obtain volatile oil from aromatic plants, however, the steam distillation method is easy to cause the loss of volatile substances, the extraction efficiency is low, the extraction time is long, and high temperature and water will make some low boiling point The degradation and chemical changes of small molecular components are not conducive to the extraction of thermally unstable substances

Supercritical CO 2 Although fluid extraction has greatly improved the extraction efficiency, the required equipment is complex, the solvent selection range is narrow, and high-pressure vessels and high-pressure pumps are required. It is difficult and costly to establish a large-scale extraction production line.

The chemical solvent extraction method consumes a lot of energy, consumes a lot of consumables, takes a long time, the extraction efficiency is low, and the amount of industrial pollution is large

Solid-phase microextraction is a simple and fast extraction technique, which is suitable for extracting small molecules and substances with low boiling points, but it is not suitable for the extraction of macromolecules or esters, and is easily affected by extraction conditions. to better reproducibility

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