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[求助]
求助具體培養(yǎng)方法
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先謝謝了有專利文獻(xiàn): The reaction mixture was allowed to stir under reflux conditions for approximately thirty minutes. After the thirty minute time period, the heating mantle was shut off to allow slow cooling of the reaction mixture with stirring. The reaction mixture was allowed to cool with stirring overnight (about 18 hours). As the reaction mixture cooled, the product crystallized out as large "yellowish" hexagonal prismatic crystals. The mixture was allowed to stir under ambient conditions for one hour. The crystals were spread over glass trays and allowed to dry under ambient conditions to a Karl Fischer value of about 9.6%. 我是這樣操作的,反應(yīng)液在攪拌作用下回流30min,然后關(guān)掉熱源繼續(xù)叫吧,自然冷卻到室溫。結(jié)果我 是生成了針晶,和文獻(xiàn)文獻(xiàn)描述不一樣!為什么?再一個文獻(xiàn)說在室溫干燥,如何操作? |
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