Method for extracting lavender extract by adopting continuous countercurrent tube type ultrasonic waves

Abstract

The invention provides a method for extracting a lavender extract by adopting continuous countercurrent tube type ultrasonic waves. The method comprises the following steps of: picking stems, leaves and petals of lavender, drying in the shade, and crushing the dried materials into powder with the particle size of 10-40 meshes; inputting the crushed lavender into a continuous countercurrent tube type ultrasonic extractor at a speed of 100kg / h, inputting an organic solvent reversely at a flow speed of 500-1000L / h, maintaining the temperature of an ultrasonic extraction tube to be 25-50 DEG C, and extracting for 20-40 minutes to obtain an extraction mixture of the lavender and the organic solvent; inputting the extraction mixture of the lavender and the organic solvent into a liquid residue squeeze-drying separator, separating residue materials, and performing squeezing separation at a speed of 20-100kg / h to obtain a mixture of the lavender extract and the organic solvent; and inputting the mixture of the lavender extract and the organic solvent into a dynamic loop low-temperature evaporation concentrator, reducing the pressure to -0.08MPa, performing evaporation concentration, maintaining the temperature to be 20-40 DEG C, recovering the organic solvent, and collecting a concentrated extract, thus obtaining the lavender extract, wherein the yield of the lavender extract is more than or equal to 15%.

Description

technical field [0001] The invention relates to the extraction of lavender, in particular to a method for extracting lavender extract by using continuous countercurrent tubular ultrasonic extraction equipment, which can significantly improve the quality and yield. Background technique [0002] Traditional lavender extraction methods: (1) The main components of a single lavender essential oil prepared by steam distillation are volatile aromatic esters and aromatic alcohols. At this time, the extraction rate of lavender essential oil is ≤ 0.9%. Lavender is an aromatic plant. In addition to the volatile lavender essential oil, it also contains a large amount of plant waxes, proteins, glycosides, sugars, etc. that are extremely beneficial to the human body but not volatile, which cannot be achieved by traditional distillation methods. Extracted and utilized; (2) CO 2 The extraction rate of the lavender extract obtained by the supercritical extraction method is less than or equa...

AI Technical Summary

Problems solved by technology

[0002] Traditional lavender extraction methods: (1) The main components of single lavender essential oil are volatile aromatic esters and aromatic alcohols obtained by steam distillation. At this time, the extraction rate of lavender essential oil is ≤0.9%.

Lavender is an aromatic plant. In addition to volatile lavender essential oil, it also contains a large amount of plant waxes, proteins, glycosides, sugars, etc., which are extremely beneficial to the human body but not volatile, which cannot be achieved through traditional distillation methods. 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, but the extraction rate is low by this extraction method, and the active ingredients of lavender extract are easily destroyed when it 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 is easy to pollute 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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