The New Extraction And Separation Technics Of Pueraria

Pueraria is a kind of resource for drug and food since it can provide people with a lot of nutriments and particular medicative effects. It has many uses. As the main active component of pueraria, puerarin is paid more attention increasingly for it can improve the blood vessel circulation of heart and brain, reduce the oxygen consumptioncapacity of cardiac muscle, reduce the blood sugar, prevent the hypertension and artery teriosclerosis, the liver poison, inflammation, removing the phlegm, allay a fever, enhances the organism immunity, antibacterial, antivirus and so on many kinds of pharmacological action, and it also has the function of enhancing vision . The pure product is very popular in international market.In this paper, the extraction and separation technics of puerarin was studied by the numbers. Adopting quench-hot extract and rime-afresh rime progress extraction and separation respectively on puerarin. Emphatically studied the condition of the extraction and separation of puerarin. The optimal operation parameters were choosed and consequently establish the favorable base for the industrialized production of puerarin. The experimental results indicate that compared with some other methods of extraction and separation, both the extraction technics and the separation technics have its inimitable traits, furthermore it still ensures relative upper extraction ratio and purity of product. The innovating point of this method lies: In the extracting process, used the heated n-butyl alcohol as the extracting solvent, it can ensure the upper extraction ratio and reduce the impurity content in the extraction solution. In the separating process, firstly importing evaporation rime, namely rotation evaporation concentrate the extraction solution to some volume and cooling rime before the traditional rime, it can remove the most daidzein, daidzin and some impurity by filtration and improve the purity of the wide extractive, and be useful for the pueraria rime. Secondly, importing hydrolyzing process between the rime and rime-afresh, it can hydrolyze the ramification of pueraria into pueraria, it can not only improve the ratio of pueraria, but improve the purity of product.