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guanjian05

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The crude product was purified by crystallization of the (+)-di-p-toluoyl-D-tartaric acid salt from 3A ethanol (ca. 5 mL/g of salt). The salt was further purified by heating a heterogeneous mixture of the crude solid at reflux in 3A ethanol (5 mL/g of salt) for 2 h, cooling to 0 °C, and filtering.This “hot reslurry” procedure gave equivalent purity (greater than 99%) and superior yields (33.4 g, 80% yield) to those of a typical recrystallization process
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guanjian05

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大家别只看不帮忙啊,知道多少写多少嘛,金币会追加的。谢谢!
2楼2009-10-22 10:53:31
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yjhorn

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guanjian05(金币+10,VIP+0):谢谢,很好。 10-22 12:45
运用D-对甲基二苯甲酰酒石酸盐在3A乙醇中结晶的方法纯化粗产物。接着用3A乙醇回流加热粗产物的混合物2小时来进一步纯化该盐。然后将其冷却至0度,过滤。这种“加热重悬”的方法可产生同样纯度的结晶(大于99%),但产量方面,该方法优于普通的重结晶方法,其产量达到33.4g,即80%。
认识大家是缘分啊!
3楼2009-10-22 12:31:21
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