杂多酸制备中pH调节问题？那就只能加点能降低其溶解度的有机溶剂了。一般都这么做。... 文献上说是用热水重结晶，选有机溶剂的话一般选啥好点，我看一篇文献上说是用丙酮，我问一下我合成出的盐能溶解在丙酮中吗，合成的产物中有硝酸根、Na和钴离子，文献上说是用丙酮萃取，直到丙酮萃取液中无硝酸根，我问问这个具体怎么操作，是在萃取的时候，把上层丙酮液吸取完以后，再在丙酮吸取液中加丙酮，直到无硝酸根吗，这样做对吗，这样下来是不是得用好多丙酮，丙酮萃取液液好多啊，这么操作呢？文献是这么说的The volume is then reduced to half by evaporation and the heteropolyanion separated in a dense lower layer by liquid-liquid extraction with 80-100 mL of acetone. The extraction is repeated until the acetone extract shows no nitric ions (ferrous sulfate test).The solid sodium salt is obtained as the hydrate (15-20H,O) by evaporation to dryness (in air) of the acetone extracts.查看更多
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