將需提取藥材投入提取罐內，按生產工藝加入一定比例的溶媒如水、乙醇、甲醇、丙酮等（根據工藝自行加入）。進行原藥提取，提取溫度可根據實際需要設定。按生產工藝進行提取，待提取結束后，將管道閥門按先后順序打開，把液體抽入濃縮罐進行濃縮。濃縮液溫度設定在需要值，真空度保持在－0.05到－0.09MPA,濃縮時產生的二次蒸汽經過冷凝器與冷卻器變成冷凝液回流至提取罐做(zuo)新溶(rong)(rong)劑加入藥里,新溶(rong)(rong)劑由上而下(xia)(xia)通過藥材層到提(ti)(ti)取(qu)罐(guan)(guan)(guan)底部,藥材中的(de)可溶(rong)(rong)性成(cheng)(cheng)分溶(rong)(rong)解于提(ti)(ti)取(qu)罐(guan)(guan)(guan)內(nei)溶(rong)(rong)劑,送至提(ti)(ti)取(qu)罐(guan)(guan)(guan)做(zuo)新溶(rong)(rong)劑,形成(cheng)(cheng)新溶(rong)(rong)劑回(hui)流提(ti)(ti)取(qu),直(zhi)至完全溶(rong)(rong)出(chu)(提(ti)(ti)取(qu)液(ye)無(wu)色(se))濃(nong)縮繼續進行,直(zhi)至濃(nong)縮成(cheng)(cheng)需要的(de)比重藥膏,提(ti)(ti)取(qu)罐(guan)(guan)(guan)內(nei)的(de)無(wu)色(se)液(ye)體可下(xia)(xia)次復用。