Method for extracting lavender extract with tank-type ultrasonic machine

Abstract

The invention provides a method for extracting a lavender extract with a tank-type ultrasonic machine, picking stems, leaves and petals of fresh lavender, drying in the shade, and pulverizing to 10-40 meshes; mixing the pulverized lavender and an organic solvent in a mass ratio of 1:(5-10), and extracting in a tank-type ultrasonic extraction machine at 25-50 DEG C for 20-40 minutes to obtain a lavender-organic solvent mixture; putting the lavender-organic solvent mixture in a liquid-residue press separator, separating the residues, and carrying out press separation at 20-100 kg / h to obtain a lavender extract-organic solvent mixture; and putting the lavender extract-organic solvent mixture in a dynamic loop low-temperature evaporation concentrator, reducing the pressure to -0.08 MPa, and recovering the organic solvent at 20-40 DEG C to obtain the lavender extract, wherein the yield of the lavender extract is at least 12%.

Description

technical field [0001] The invention relates to the extract of lavender, and is especially suitable for a method for ultrasonically extracting the lavender extract, which can effectively improve the recovery rate compared with the prior art. Background technique [0002] Traditional lavender extraction methods: (1) Steam distillation to obtain a single lavender essential oil whose main components are volatile aromatic esters and aromatic alcohols. The extraction rate of lavender essential oil is ≤0.9%. In addition to the volatile lavender essential oil, lavender, an aromatic plant, also contains a large amount of plant waxes, proteins, glycosides, sugars and other components that are extremely beneficial to the human body but are not volatile. It cannot be extracted and utilized; (2) CO 2 The extraction rate of lavender extract obtained by supercritical extraction is ≤5.6%, and the final extraction temperature is ≥50°C. The extraction rate of this extraction method is low...

AI Technical Summary

Problems solved by technology

In addition to the volatile lavender essential oil, lavender, an aromatic plant, also contains a large amount of plant waxes, proteins, glycosides, sugars and other components that are extremely beneficial to the human body but are not volatile. It cannot be extracted and utilized; (2) CO 2 The extraction rate of lavender extract obtained by supercritical extraction method is ≤5.6%, and the final extraction temperature is ≥50°C. The extraction rate of this extraction method is low, and the active ingredients of lavender extract are easily destroyed when the temperature is above 50°C; (3 ) The extraction rate of lavender extract by fixed bed extraction is ≤2.9%. This method cannot be produced continuously, the recovery rate of organic solvent is low, and the production process is in a non-closed state, which will have a certain impact on the environment.

[0003] The lavender extract obtained by this method, in addition to volatile lavender essential oil, also contains a large amount of non-volatile plant waxes, proteins, glycosides, sugars and other components, accounting for 20-25% of the total amount of the extract, and effective The use of high-value components cannot be achieved through traditional extraction methods, which is where the value of this method lies.

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