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    • 4. 发明授权
    • 테레프탈알데히드의 정제방법
    • 테레프탈드의정제방법
    • KR100874568B1
    • 2008-12-16
    • KR1020060059438
    • 2006-06-29
    • 주식회사 엘지화학
    • 강성훈박인규박종서채종현김영대
    • C07C47/09C07C47/06
    • C07C45/81C07C47/544
    • The present invention relates to a method for preparing high-purity terephthalaldehyde which comprises re-crystallizing terephthalaldehyde crystals containing impurities, using an anti-solvent. Specifically, the present invention relates to a method for preparing terephthalaldehyde which comprises dissolving low-purity terephthalaldehyde prepared by a conventional method in dimethylsulfoxide and then re-crystallizing the solution, using water as an anti-solvent. The present invention is not only environment-friendly because it uses water only as an anti-solvent, but also economical because it may simply prepare high-purity terephthalaldehyde in a short time.
    • 本发明涉及一种制备高纯度对苯二甲醛的方法,该方法包括使用抗溶剂重结晶含杂质的对苯二甲醛晶体。 具体而言,本发明涉及对苯二甲醛的制备方法,其包括将用常规方法制备的低纯度对苯二甲醛溶解在二甲基亚砜中,然后用水作为反溶剂使溶液重结晶。 本发明不仅环保,因为它仅使用水作为反溶剂,而且由于其可以在短时间内简单地制备高纯度对苯二甲醛,因此也是经济的。