Stage extraction method for rose essential oil

Abstract

The invention discloses a stage extraction method for rose essential oil, and relates to the field of plant extraction, in particular to a stage extraction method for rose essential oil.According to the stage extraction method for rose essential oil, defects in an existing distillation way are overcome, and aroma constituents with low, intermediate and high boiling points volatilized from rose are extracted as much as possible, aroma constituents with the low boiling point are not lost, and headspace aroma is not lost.A traditional distillation process is divided into three stages, and introduced steam amount, temperature and time are different in different stages.By means of the method, aroma constituents volatilized from rose can be extracted as much as possible, the essential oil yield can be improved by 17% compared with the traditional distillation process, the essential oil yield can be improved by 8% through concentration at different temperatures compared with traditional one-time condensation, and the total essential oil yield can be improved by 25%.

Description

technical field [0001] The invention relates to the field of plant extraction, in particular to a method for segmentally extracting rose essential oil. Background technique [0002] Rose is one of the famous flowers in the world, known as the "Queen of Flowers", and was honored as the "Flower of the Goddess" in ancient China. Rose oil extracted from roses is known as "liquid gold". In the terminal market of distilled rose essential oil, the value of 1 kg of rose essential oil is approximately equal to 1.25 kg of gold. [0003] As a special natural fragrance, rose essential oil has a long history of use. The existing preparation process is mainly divided into solvent extraction and distillation extraction. Since solvent extraction will be mixed with organic solvents, the quality of the essential oil extracted by distillation in the existing process is the highest. Well, because the purely physical production process does not contain any chemical solvents, this process is wid...

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Problems solved by technology

[0004] At present, the distillation process mainly adopts the steam distillation method, which is divided into indirect distillation and direct distillation. However, because the traditional distillation process is derived from the extraction of traditional Chinese medicine, generally there is only one-stage condenser, and the two distillation methods have their own defects, such as indirect distillation. The temperature is low, the heating time is long, and the roses at the bottom of the still cannot be fully exposed to the steam, resulting in the incomplete vaporization of some aromatic components, and the yield is low. However, the direct distillation temperature is high, so that the low-boiling substances in the rose aromatic components are boiled before boiling. It is vaporized prematurely, it is difficult to collect, and the loss of top notes is serious. Not only is the yield low, but the extracted rose essential oil has a strong smell, and the oil contains impurities, which affect the quality of the essential oil. The two distillation methods currently use the same steam flow rate and The primary condenser is cooled, so that the rose components in the still can not be completely vaporized, and the oil-vapor mixture entering the condenser cannot be completely cooled, resulting in the loss of oil and vapor, which seriously affects the yield and quality of rose essential oil

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