Method for extracting plant effective component by interior evaporation and diacolation

Abstract

The invention relates to a method for extracting effective components of plant in the separating project, wherein it uses internal gasifying effusion method to extract; the plant organism is wetted by the low-boiling point absorber, to make the extractive dissolvent whose temperature is higher than the boiling point of desorbent flow along the stable wetted material, to heat and gasify the desorbent inside the material without gasification, and the effective component will be gasified and brought outside the material to be taken away with flowing dissolvent. Compared with present extraction technique, the invention can reduce the extraction time more than 10 times, and the effective component yield can be improved 10-20%; compared with microwave strengthen extraction method, the invention has simple operation, while its extracted dissolvent less 20-50% then intermission method.

Description

technical field [0001] The invention relates to a method for extracting plant active ingredients in separation engineering, in particular to a method for extracting plant active ingredients by internal vaporization percolation. Background technique [0002] The extraction of effective plant components is the basis for the production of natural medicines. The traditional extraction process can be divided into three types according to time: the first is intermittent extraction, in which materials and solvents are operated in batches during the extraction process, such as decoction, reflux and cold soaking extraction, although the extraction process is simple, but Low yield, long time and many impurities in the extract; the second is percolation extraction, which is an extraction process in which materials are intermittently loaded and unloaded, the solvent first penetrates the material and then flows continuously. This extraction is also simple, but due to percolation extracti...

AI Technical Summary

Problems solved by technology

The traditional extraction process can be divided into three types according to time: the first is intermittent extraction, in which materials and solvents are operated in batches during the extraction process, such as decoction, reflux and cold soaking extraction, although the extraction process is simple, but Low yield, long time and many impurities in the extract; the second is percolation extraction, which is an extraction process in which materials are intermittently loaded and unloaded, the solvent first penetrates the material and then flows continuously. This extraction is also simple, but due to percolation extraction The speed is very slow, the solvent consumption is high, and the process efficiency is not high. It is often used in the extraction process of low-temperature organic solvents. For example, "Chinese Medicinal Materials" (pages 613 to 614 of the 7th issue of 2005) introduced the percolation process research of Zhuanggu Joint Granules , extracted with 80% ethanol, and the time is more than 24 hours; the third is continuous extraction, which is an extraction process in which both materials and solvents flow continuously. This extraction operation is continuous and the amount of solvent is small, but the equipment is complicated. "Engineering Design Magazine" (2004, No. 2, pages 4 to 7) introduced a baffle type continuous countercurrent extraction machine, which uses 4 to 5 stages of folding screw to convey the extracted material, and the solvent is contacted in countercurrent to realize continuous extraction. A device with a complex structure

[0003] Due to the slow speed and low efficiency of traditional extraction methods, many studies have been carried out using external field enhanced extraction methods, such as microwave and ultrasonic extraction. The external field enhanced method improves the extraction speed and efficiency, but these extraction equipment are complex and mostly use intermittent Operation, such as Chinese patent [application (patent) number] CN02149695.1 discloses the method for extracting plant active ingredient by microwave pretreatment, microwave pretreatment and solvent extraction all adopt intermittent extraction method, although extraction speed is fast, output is high, but electric High consumption

"Chinese Patent Medicine" (the 7th phase 525 to 528 pages in 2004) has reported the pilot test research of microwave-assisted extraction of icariin, it adopts continuous microwave-assisted extraction pilot plant, and the extraction yield has improved to a certain extent, but The extraction device is complicated and the operation control is difficult

[0004] In order to overcome the shortage of complex equipment and operation brought about by external field strengthening, "Guangxi Science" (2006, No. 1, pp. 43-45) introduced the method of decompression and internal boiling to extract chlorogenic acid in honeysuckle. It desorbs with a small amount of low boiling point The agent wets the extracted material powder to fully desorb the active ingredients, then adds a hot extraction solvent at a certain temperature and quickly decompresses, so that the desorbent that penetrates into the plant tissue first boils, and the extraction process is strengthened

This method has the advantages of low extraction temperature, fast speed and less impurity content, but it uses intermittent extraction, large extraction equipment, troublesome operation, and high solvent consumption