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采用新萃取体系 [2 0 %脂肪醇 (1#溶剂 ) -二甲苯 ]代替旧萃取体系 (纯甲苯或二甲苯 )从麻黄素配制料液和麻黄草浸出液 (草水 )中萃取麻黄素 ,研究了有关工艺 ,并建立了萃取分配模型如下 :α=1.79× 10 - 3exp ( -110 9.49/T+13 .0 1)v1+10 9.2 2 - p H研究表明 ,新萃取体系对麻黄素有更强的萃取能力 ,只需 4个理论级数即可使出口残液浓度降到 0 .0 0 6 %以下 ,萃取回收率从现在的 88%提高到 94%以上。
Extraction of ephedrine from ephedrine formulation and ephedra extract (grass water) using a new extraction system [20% fatty alcohol (1#solvent)-xylene] instead of the old extraction system (pure toluene or xylene) The related process and the extraction distribution model were established as follows: α=1.79×10 -3 exp (-110 9.49/T+13 .0 1)v1+10 9.2 2 -p H. The study showed that the new extraction system has the same effect on ephedrine. With stronger extraction capacity, only 4 theoretical stages are needed to reduce the concentration of the exit raffinate to less than 0.06%. The extraction recovery rate is increased from the current 88% to more than 94%.