Limonene; commonly known as lemon olein, is a cyclic monoterpene widely found in various essential oils.
At room temperature, these two isomers are both colorless and flammable liquids with a strong pleasant fragrance.
L-limonene smells It has a lemon/turpentine flavor, while d-limonene has a lemon/orange flavor. ;
Especially in lemon oil, lemon wormwood oil, orange oil, bergamot oil, dill oil. Limonene molecule contains a chiral center, including L-limonene, dextro-limonene optical isomers, and a racemate.
Methods of production:
Exist widely in natural plant essential oils. Among them, tangerine oil, lemon oil, orange oil, camphor white oil, and so on mainly contain dextrorotation. There is peppermint oil and so on that contain L-body. The racemates are neroli oil, cedar oil, and camphor white oil. In the manufacture of this product, the above-mentioned essential oils are separately obtained by fractional distillation.
Terpenes can also be extracted from ordinary essential oils, or produced as by-products in the process of processing camphor oil and synthesizing camphor. The obtained dependence can be purified by distillation to obtain limonene.
Use turpentine as raw material, carry out fractional distillation, cut out α-pinene, make camphene through isomerization, and then obtain it by fractional distillation. The by-product of camphene is dipentene. In addition, dependence can be by-produced when turpentine is used to hydrate terpineol.
Calcium chloride or anhydrous sodium sulfate dehydration and then vacuum distillation.