2727根據眾多的實踐經驗,精油的提煉方式分主要有三種,分別是溶劑萃取法、蒸汽蒸餾法和冷壓法。
無論使用哪一種方式,在提煉的過程,一般都有以下的幾個特點:
——提取精油的材料必須是天然的有機植物
——提煉的工藝過程必須符合提煉的要求(譬如溫度、時間、冷壓水溫、環境衛生要求等……)
——提煉必須要完全,盡可能物盡其用,避免浪費。
專業的精油提煉工廠在提煉過程中,都會嚴格控制提煉流程, 主要是考慮精油的以下特質:
——精油易揮發
——溫度低于100℃下蒸發獲取精油
——精油不溶于水,但易溶于有機溶劑
——容易被空氣中的氧氣等成分氧化
以下是幾種提煉方法:
1、溶劑萃取法,浸漬法,脂吸法
【備注:然然在翻譯的時候,并不會完全直譯過來,會根據實際的情況進行調整,給到大家比較準確的方式,這一類的方式,主要是借用了精油易溶于有機溶劑,但是不同的溶劑沸點不同進行的。 】
這是最古老的精油提煉方式,已經有著幾千年的提煉歷史了。古老的提煉技術中,在提煉時,經常會把茉莉花、玫瑰、橙花等花瓣整齊的鋪在涂有植物油脂的托盤上(經常使用玻璃),然后一層一層的疊加,以此獲取比較好質量的植物油脂。之后,會通過溶劑分離的方式,獲取想要的植物精油。 整個過程需要非常嚴格、細致的操作,時間往往也很長。
補充:此外現在更多使用一些植物油作為載體進行浸泡,以此獲取想要的具有一定功效的植物浸泡油,都是非常好的一些方法。


2、水蒸氣蒸餾法
這是從植物中提取精油最主要方法。
通過緩慢的加熱水,獲取一定溫度的蒸汽,通過蒸汽的方式緩慢的將植物油囊中的芳香分子,慢慢的蒸餾出來。

3、冷壓法
冷壓法往往是 甜橙、橘子,葡萄柚等蕓香科果皮類精油的主要提煉方式。簡單的清洗,獲取果皮,果皮上布滿了含有植物精油的油囊,輕輕的用擠壓法,就可以獲取芬芳的植物精油。但是后期需要過濾。

除上述基本方法外,目前也比較常用超臨界CO2萃取法、超聲波法、微波法等很多的方式來獲取精油,精油的提煉技術隨著科技的進步,也正發展出更多有效,有用,獲取更多精油的方式。
英文原文
Essential oil extraction method

Based on practice, we divide the oil production methods into 3 categories: Soak; Steamdistillation and Injection
But despite conducted according to any method, the manufacturing process has the following general points:
- Essential oils obtained have natural fragrance materials.
- Process must conform exploitation material.
- Essential oils must be obtained from the material thoroughly, with the lowestcost.
Principles of extraction of all the above methods are based on the properties of essential oils such as:
- Volatile.
- Alluring under steam at temperatures below 100oC.
- Easily soluble in organic solvents.
- Easy to be absorbed immediately in the air.
1. Dipping Method
This is the oldest method of producing oil, used for thousands of years. Tocreate an herb oils with best quality, all kinds of flowers such as jasmine,rose, orange blossom is spread out on a tray covered with a layer of oildilution. Processes that oil becomes saturated with fragrance called "separation methods flavoring", and only after several months they keep adding newprocess impact using a solvent to separate the aroma substances. This processis very meticulous, thorough and requires a long time.
2. Steamdistillation method
This is the main method for extracting essential oils from plants. The type ofplant essential oils contained in large vats and boiled under high pressure.Aerosols containing oil is cooled and distilled to one or more times toconcentrate the product.
3. Injection Method
Essential oils oranges, tangerines, grapefruits are extracted by this method.Simply peel squash, contain many parts most drops. With the squeeze method, onecan get full off of vegetable oil.
In addition to the basic method above, it is now applied to scientific and technical progressfor extraction of essential oils such as supercritical CO2 method, ultrasonicmethod, microwave method. The advantage of this method is the extraction of oilis much better, in faster time.
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