Traditional Chinese medicine extraction technology of solvent extraction separation
solvent extraction separation process is the use of organic phase from the ranks of mixed liquid to a substance extracted a separation method, solvent extraction process, including extraction, washing and reverse extraction stages. Certain substances extraction is to make the water phase to the organic phase, washing is made into organic phase impurities (back in the water phase Washing liquid) The extraction was made by extraction material ( Target group) From organic phase to water phase, in order to facilitate further processing products. Need preprocessing before some of extractant in extraction ( Such as saponification, etc. ) To ensure the extraction conditions.
Chinese medicine extraction technology of solvent extraction separation process is the key to the selection of extraction agent, in addition to economic benefits, to choose the basic principles of extracting agent for:
1. Good selectivity, and easier to implement separation medicinal materials;
2。 Performance of extraction kinetics, the balancing speed;
3。 Big extraction capacity, extraction agent small;
4。 Solubility in the aqueous phase is small, and the chemical stability is good;
5。 Easy and diluent miscibility, after mixing with good performance, is not easy to generate a third phase.