Method for extracting glycyrrhizic acid and liquorice flavonoid by using continuous countercurrent ultrasonic extraction machine

Abstract

The invention provides a method for extracting glycyrrhizic acid and liquorice flavonoid by using a continuous countercurrent ultrasonic extraction machine. The scheme process comprises the following steps of: 1, conveying liquorice subjected to treatment into an extraction pipe of the continuous countercurrent ultrasonic extraction machine through a quantitative feeder and inputting an extracting solvent into the extraction pipe from a dreg-discharging end of the ultrasonic extraction machine; 2, performing countercurrent ultrasonic extraction on the liquorice and the extracting solvent in the extraction pipe at the temperature of between 30 and 60 DEG C and under normal pressure; 3, after countercurrent ultrasonic extraction, discharging the liquorice dreg from a dreg-discharging port of the ultrasonic extraction machine, treating the liquorice dreg, recovering the solvent, and discharging the extracting solution from a liquid-discharging port of the ultrasonic extraction machine; 4, performing dreg liquid separation on the extracting solution and concentrating by using a concentrating tank to obtain a concentrated solution; and 5, performing solid liquid separation on the concentrated solution, drying the obtained solid to obtain a liquorice flavonoid product, adjusting pH value of the separated liquid by using inorganic acid, performing solid liquid separation, drying the separated solid to obtain a glycyrrhizic acid finished product, and concentrating and drying the separated liquid to obtain a mixture of angelica polysaccharide, liquorice flavonoid and glycyrrhizic acid.

Description

Technical field: [0001] The invention relates to an extraction method, in particular to a method for extracting glycyrrhizic acid and licorice flavonoids using a continuous countercurrent ultrasonic extraction machine. Background technique: [0002] In the production of glycyrrhizic acid and licorice flavonoids in the prior art, most of the original multi-functional extraction tanks are used for heat reflux extraction. With this method of extraction, the required extraction temperature is high, and the extraction rate is low. Moreover, in the production process Also will produce a large amount of waste gas and waste water, pollute the environment. Invention content: [0003] The technical problem to be solved by the present invention is to provide a technical scheme for extracting glycyrrhizic acid and licorice flavonoids using a continuous countercurrent ultrasonic extraction machine, which is adopted on the continuous countercurrent ultrasonic extraction machine. The co...

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Problems solved by technology

[0002] In the production of glycyrrhizic acid and licorice flavonoids in the prior art, most of the original multi-functional extraction tanks are used for heat reflux extraction. With this method of extraction, the required extraction temperature is high, and the extraction rate is low. Moreover, in the production process A large amount of waste gas and waste water will also be produced, which will pollute the environment