方法：应用水洗对青霉素滤液进行洗涤。
Method:Adopting water—washing method to wash filtrate of penicillin. Results.
合并滤液和洗涤液浓缩并冻干以分离更昔洛韦L -缬氨酸酯。
The combined filtrates from filtration and the washings are concentrated and lyophilized to isolate ganciclovir L-valine ester.
对于过滤后得到的滤液及洗涤结晶体后得到的洗液，可以分别经过蒸馏分离，得到可以再次使用的溶剂和洗涤剂以及含砷量高的余量黄磷。
The resultant filtrate and washing liquid are distilled and separated separately to obtain solvent and washing agent as well as yellow phosphorus with high arsenic content for reuse.
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