Water vapor distillation of volatile components is conducted at the temperature of about 100 °С and allows to extract substances from vegetative raw materials at rather low boiling temperatures (150 - 250 °С). To the advantages of the steam distillation method could be added such benefits as its feasibility in field conditions and low cost of essential oils. However, at high distillation temperatures volatile substances undergo danaturation and some valuable components get modified, aromas get distorted. Besides, some essential oils require fining due to the formation of undesirable decomposition products. Storage periods of such oils are limited, already in 6-9 months periods, the polymerization process begins and smell gets even more deformed. Vacuum distillation is a more progressive method in comparison with the usual atmospheric ones, however it is used, mainly, for crude oils fining.