Extraction method of taxus active extract
An extraction method and extract technology are applied in the directions of organic active ingredients, pharmaceutical formulations, medical preparations containing active ingredients, etc., which can solve problems such as large damage and achieve the effect of improving yield
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[0012] A method for extracting the active extract of taxus paclitaxel, comprising the following process steps:
[0013] (1) Grind yew branches and leaves (3000g dry leaves) to 20-50 mesh, add 5 times the amount of petroleum ether, place at 0-5°C for 10-12 hours, degrease, and filter to obtain filter residue;
[0014] (2) The filter residue is placed in an extraction kettle, and 90% methanol is added to 8-10 times the volume of yew branches and leaves for extraction. The temperature of the extract is -7-5°C, the extraction time is 4-5 hours, and the filtrate is obtained by filtration. Adjust the pH of the filtrate to neutral; add 5 times the amount of 55% methanol to the filter residue for extraction, the temperature of the extract is -10-5°C, the extraction time is 4-5 hours, and the filtrate is obtained by filtration, and the pH of the filtrate is adjusted to neutral; Add 5 times the amount of 45% methanol to the filter residue for extraction, the temperature of the extract i...
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