Extraction method for dauricine
An extraction method and a technique for puerariaeine, applied in the field of caffeine extraction, can solve the problems of destruction of effective components, complicated operation and high cost, and achieve the effects of improving efficiency and reducing cost.
Inactive Publication Date: 2014-09-10
王剑
View PDF4 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] Dauricine has antipyretic, analgesic, antispasmodic, antihypertensive, and diuretic effects. It is mainly used for the treatment of tonsillitis, rheumatic pain, and asthma. The traditional extraction method is easy to destroy the active ingredients, and the solvent consumption Large, complex operation, high cost
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0013] A method for extracting dauricine, comprising the steps of: grinding the rhizome of pueraria daurica into powder, extracting it three times with 95% ethanol, and recovering the ethanol to obtain an extract. Extraction with 2% H 2 SO 4 Extracted several times, H 2 SO 4 The solution was extracted with chloroform to remove fat-soluble impurities, and the remaining acid solution was basified with ammonia water to a pH value of 9-10. It was extracted several times with chloroform, the chloroform solution was concentrated to an appropriate amount, and extracted several times with 3% KOH solution. The remaining chloroform solution was washed with water until it was neutral and then washed with Na 2 SO 4 Dehydration, recovery of chloroform to dryness. The residue was dissolved with sulfuric acid, and the acid solution was basified with ammonia water to a pH value of 9-10. Diethyl ether was extracted several times, the diethyl ether was extracted several times with 3% KOH...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an extraction method for dauricine. The extraction method comprises the steps that the roots and stems of Menispermum dauricum are ground into powder, extraction is performed three times through 95% ethyl alcohol, and the ethyl alcohol is recovered to obtain extract; solution extraction is performed several times on the extract through a 2% H2SO4 solution, oil-soluble impurities in the H2SO4 solution removed through chloroform extraction, and the remaining acid liquid is alkalified until the pH value of the remaining acid liquid reaches 9-10; afterwards, chloroform extraction is performed several times, a chloroform solution is concentrated to an appropriate amount, and a 3% KOH solution is used for extraction several times; the remaining chloroform solution is washed to be neutral, a Na2SO4 aqueous solution is used for dehydration, and chloroform is recovered until the chloroform is dried; residuals are dissolved through H2SO4, and the acid solution is alkalified through ammonia water until the pH value reaches 9-10; diethyl ether extraction is performed several times, extraction is performed on a diethyl ether solution through 3% KOH several times, and the alkali solutions are merged; excess NH4Cl is added until the pH value reaches 9-10, turbid liquid is extracted through diethyl ether, the diethyl ether solutions are merged, and re-crystallization is performed to obtain the dauricine. According to the extraction method for the dauricine, cost is lowered, and efficiency is enhanced.
Description
technical field [0001] The invention relates to a method for extracting caffeine, in particular to a method for extracting caffeine from waste tea powder. Background technique [0002] Dauricine has antipyretic, analgesic, antispasmodic, antihypertensive, and diuretic effects. It is mainly used for the treatment of tonsillitis, rheumatic pain, and asthma. The traditional extraction method is easy to destroy the active ingredients, and the solvent consumption Large, complicated to operate, and high in cost. Contents of the invention [0003] The object of the present invention is to provide a method for extracting dauricine, which can solve one or more of the above-mentioned problems in the prior art. [0004] According to one aspect of the present invention, a kind of dauricine extraction method is provided, and its raw material is waste tea powder, comprises the following steps: [0005] ① Grind the rhizomes of Pueraria japonica into powder, extract 3 times with 95% eth...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C07D217/20
CPCC07D217/20
Inventor 王健
Owner 王剑