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cvb537

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zuibai

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【答案】应助回帖

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爱与雨下(金币+1): 2011-11-23 19:32:42
cvb537(金币+30, 翻译EPI+1): 多谢!! 2011-11-23 22:05:56
【解决方法】 将含有粗制的1,6-dihydroxynaphthalene的热水溶液冷却,在1,6-dihydroxynaphthalene的结晶将要析出之际,在上述热水溶液中加入其重量的3~50%的无机盐类,让其在40℃以上的温度中开始结晶析出。以此为特征的方法即为1,6-dihydroxynaphthalene的精制法。
2楼2011-11-23 17:44:17
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