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1. 发明公开

EP2114849A1 METHOD OF PURIFYING DIANHYDRIDES 有权
标题翻译：纯化二醛的方法
公开(公告)号：EP2114849A1
公开(公告)日：2009-11-11
申请号：EP07716258.4
申请日：2007-01-04
申请人： SABIC Innovative Plastics IP B.V.
发明人： PRESSMAN, Eric, James , STELLA, Albert, Santo , BERNABE, Beatriz, Penalver , KLOPPENBURG, Lioba, Maria , BERGMAN, Lee, Harris
IPC分类号： C07C51/087 , C07C51/56 , C07C51/573 , C07D307/89
CPC分类号： C07C51/573 , C07D307/89
摘要： Disclosed herein is a method for purification of dianhydrides comprising a substantial amount (10000 ppm or more) of at least one metal salt. In one aspect the method is useful for the purification of dianhydrides prepared by the reaction of a halophthalic anhydride with a metal carbonate and may be optionally catalyzed by a phase transfer catalyst. The purification of the dianhydrides may be accomplished by hydrolyzing the dianhydride metal salt mixture directly to a tetraacid with an inorganic acid, followed by separating the impurities from an aqueous phase, and subsequently heating the tetraacid to effect ring closure to form a purified dianhydride having less than 50 parts per million metal halide and lower levels of other residual impurities. In one aspect the method is highly effective in removing phase transfer catalyst impurities such as hexalkylguanidinium halides initially present in the dianhydride undergoing purification.
摘要翻译：本文公开了一种纯化二酐的方法，其包含大量（10000ppm或更多）的至少一种金属盐。在一个方面，该方法可用于纯化通过卤代邻苯二甲酸酐与金属碳酸盐反应制备的二酐，并且可以任选地通过相转移催化剂进行催化。二酐的纯化可以通过用无机酸将二酐金属盐混合物直接水解成四酸来完成，随后从水相中分离杂质，随后加热四酸以实现环闭合以形成具有较少的纯化二酐百万分之五十的金属卤化物和较低水平的其他残余杂质。在一个方面，该方法非常有效地去除初始存在于进行纯化的二酐中的相转移催化剂杂质，例如卤化己烷胍。

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