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["["réaction de du matériau","","Insérez l'acétobérate dans un solvant de toluène,将邻苯甲酰苯甲酸投入甲苯溶剂里,再投入少量浓硫酸。升温到1以上以上至回流。开始缓慢滴加甲醇脱掉反应介质里的水。约以小时后。脱水结束。取样中控。转化率大于以合格。下一步减洗,转化率大于以,物料含量小于以.合格。蒸去甲苯。加入甲醇降温至有白色晶体析出,离心出白色晶体。包装。请师傅给讲一下反应的过程。和作用。只有高中文化。想多学点。谢谢!","lecette est également une réaction de l'acétique formée par l'acétobérate et l'alcool."","Ce n'est pas si simple,邻苯甲酰苯甲酸在浓硫酸中加热会分子内脱水关环生成蒽醌。","","Oui,我们最后蒽醌的含量很低不会超过以.5"",""Oui我们最后蒽醌的含量很低不会超过以.5"""Oui我们最后蒽醌的含量很低不会超过以.5"]

2017-10-29View Original

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将邻苯甲酰苯甲酸投入甲苯溶剂里,再投入少量浓硫酸。升温到105以上至回流。开始缓慢滴加甲醇脱掉反应介质里的水。约12小时后。脱水结束。取样中控。转化率大于97合格。下一步减洗,转化率大于99,物料含量小于0.2合格。蒸去甲苯。加入甲醇降温至有白色晶体析出,离心出白色晶体。包装。请师傅给讲一下反应的过程。和作用。只有高中文化。想多学点。谢谢!
Reply #22017-10-29
这也是中学的酸加醇生成酯的反应。 -COOH+CH3-OH=-CO-OCH3+H2O。
Reply #32017-11-06
没那么简单,邻苯甲酰苯甲酸在浓硫酸中加热会分子内脱水关环,生成蒽醌。
Reply #42017-11-07
嗯,我们最后蒽醌的含量很低,不会超过0.5
Reply #52017-11-07
嗯,我们最后蒽醌的含量很低,不会超过0.5
Reply #62017-11-07
嗯,我们最后蒽醌的含量很低,不会超过0.5

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