excess metal 中文意思是什麼
excess metal
解釋
多餘金屬-
This method, however, involves using a large excess of diethyl carbonate ( for example, 4 - 8 mols. ) ; it also involves preparing sodium ethylate by dissolving sodium metal in ethanol, which process must be carried out very slowly and carefully if it is to be used on a manufacturing scale
但是這一方法涉及到使用大量過量的二乙基碳酸酯(例如, 4 - 8摩爾) ;同時也涉及到在乙醇中溶解納來制備乙醇納的反應,這個過程必須非常緩慢小心地進行,如果在工業生產級別上是用這一方法就比較麻煩了。
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