Study on recovery of ethyl acetate after extracting tripterygium wifordii extractum with ethyl acetate / 中国中药杂志

<p><b>OBJECTIVE</b>To increase the recovery rate of ethyl acetate after extracting tripterygium wifordii extractum and to decrease product cost.</p><p><b>METHOD</b>After extracting tripterygium wifordii extractum with ethyl acetate, 3 times saturated salt water was added in it so as to recovery ethyl acetate distilled under normal atmospheric pressure. Ethyl acetate containing salt water was purified through Na2SO4 column.</p><p><b>RESULT</b>Ethyl acetate purified could be used repeatedly and the recovery rate was up to 85%.</p><p><b>CONCLUSION</b>This method is completely adapted for mass production.</p>