Method used for extracting chamomille extract by supercritical carbon dioxide extraction

Abstract

The invention provides a method used for extracting chamomille extract by supercritical carbon dioxide extraction. The method comprises following steps: collected fresh chamomile flowers are dried naturally in the shade until the water content is 20% or less; the dried chamomile flowers are smashed and the smashed chamomile flowers are sieved by 20 to 60 meshes sieves; the smashed chamomile flowers are delivered into an extraction kettle, and is extracted for 1 to 3.5h, wherein the flow velocity of carbon dioxide is 20 to 60L / h, ethanol is used as a carrying agent, the flow velocity of ethanol is 0.2 to 2L / h, the temperature is kept at 30 to 60 DEG C, and the pressure is 9 to 16MPa; the obtained extract is delivered into a column-type separation kettle for separation so as to obtain a mixture of chamomile, residual water and organic solvents; the mixture is delivered into a reduced-pressure low-temperature concentrator, the pressure is reduced to -0.04 to -0.09MPa, and the residual water is removed and the organic solvents are recycled at a temperature of 20 to 55 DEG C so as to obtain the chamomille extract. Carbon dioxide is used as a supercritical extraction agent; no toxic or organic matters are left, and no side-effects exist; extraction yield can reach 2.8%; and the method is suitable for industrialized production.

Description

technical field [0001] The invention relates to supercritical carbon dioxide extraction technology, is especially suitable for chamomile extract, and belongs to the extraction method of effective part components of plants. Background technique [0002] The traditional chamomile extract is obtained by steam distillation at room temperature or by organic solvent extraction such as petroleum ether, benzene, and aldehyde. The extraction rate of active ingredients is low, and often contains organic solvent residues such as ether, benzene, and aldehyde. adversely affect users. The main components of single chamomile essential oil are volatile aromatic esters, aromatic alcohols, terpenoids, and cyclic hydrocarbons obtained by traditional steam distillation, and the extraction rate is ≤1.5%. As a spice plant, chamomile flower contains not only chamomile flower essential oil, but also a large amount of plant waxes, proteins, glycosides, sugars, natural pigments and other components ...

AI Technical Summary

Problems solved by technology

[0002] The traditional chamomile extract is obtained by steam distillation at room temperature or by organic solvent extraction such as petroleum ether, benzene, and aldehyde. The extraction rate of active ingredients is low, and often contains organic solvent residues such as ether, benzene, and aldehyde. adverse effect on users

The main components of single chamomile essential oil are volatile aromatic esters, aromatic alcohols, terpenoids, and cyclic hydrocarbons obtained by traditional steam distillation, and the extraction rate is ≤1.5%.

As a spice type plant, chamomile flower not only contains chamomile flower essential oil, but also contains a large amount of plant wax, protein, glycosides, sugars, natural pigments and other components that are extremely beneficial to the human body but not volatile (accounting for 20% of the total amount of the extract). ~50%), these useful and expensive components cannot be achieved through traditional extraction methods

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