发明公开
EP0907645A1 VERFAHREN ZUR REINIGUNG VON PHTHALID 失效
程序对清洁酞

VERFAHREN ZUR REINIGUNG VON PHTHALID
摘要:
The present invention relates to a process for purifying phthalide contamined with carboxylic acids and/or their derivatives, in which polyethyene glycol and/or polypropylene glycol is added to the phthalide to be purified and then subjected to fractional distillation.
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