Extraction method of Chinese torreya shell essential oil

Abstract

The invention relates to an extraction method of essential oil and selects two technological extraction ways depending on the difference of freshness of the Chinese torreya shell raw material. As regard to fresh Chinese torreya shells, namely the Chinese torreya shells stored for no more than 1 day under normal temperature and pressure, and a method of first cold pressing and then steam distillation can be adopted; as regard to stale Chinese torreya shells, namely the Chinese torreya shells stored for more than 1 day under normal temperature and pressure and serious browning occurs, a method of first drying, then grinding and finally steam distillation can be adopted. The oil yields of the Chinese torreya shell essential oils obtained by the two extraction methods are respectively 0.3-0.5 percent (v / w, wet basic weight) and 1-1.25 percent (v / w, dry basic weight). By GC-MS analysis and electronic nose comparison, the flavour and constituents of the two essential oils are quite similar. By adopting different extraction processes according to the difference of freshness of the raw materials, the invention finally utilizes the steam distillation technology to extract the Chinese torreya shell essential oil and the method is characterized by safety, convenience, high efficiency, low cost, etc.

Description

technical field [0001] The invention relates to a method for extracting essential oil of Chinese torreya shell. Especially for the freshness of Torreya husks, two different extraction processes are used, but finally steam distillation is used to extract the essential oil of Torreya husks. Background technique [0002] Torreya grandis cv merrilli, also known as Torreya grandis cv merrilli, is one of the precious dried fruits. It is an evergreen tree of the yew family Torreya genus, native to China. Its fruit is one of the best quality in the Torreya genus, and it is one of the rare and precious dried fruits in the world. It is rarely cultivated in other countries, and it has been cultivated in my country for more than 1300 years. Torreya torreya is a rare fruit tree in the world. It is a unique economic tree species in my country. It has high edible and medicinal value. It is a relict plant of the Tertiary Period. 10 provinces and cities including Jiangxi, Jiangxi and Hunan...

AI Technical Summary

Problems solved by technology

The pressing method is suitable for the extraction of essential oils rich in heat-sensitive substances such as terpenoids and aldehydes. Its advantage is that it can protect heat-sensitive components at room temperature. The disadvantage is that the purity of essential oils in the product is not high and there are many impurities.

The essential oil products obtained by extraction and distillation can better retain the original aroma of raw materials, and can extract components that cannot be extracted by distillation and pressing methods. The disadvantage is that the consumption of organic solvents is relatively large, and most organic solvents are easy to remain in the product

Supercritical CO 2 The advantage of fluid extraction is that the extraction efficiency is high, and it can avoid the decomposition and loss of heat-sensitive components in the product. The disadvantage is that the extraction cost is relatively high, and it is generally used for the extraction of high-value drugs.

Molecular distillation is mostly used in the medical field with high added value. It is characterized by fast extraction rate and high extraction efficiency. The disadvantage is that the operation is cumbersome and requires a high degree of sample crushing.

The advantage of steam distillation is that the distillation rate is faster and the oil yield is higher, and so far there has been no report on extracting essential oil from Torreya husk with steam distillation

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