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US4697023A Process for the preparation of oxy-diphthalic anhydrides 失效
氧基二邻苯二甲酸酐的制备方法

Process for the preparation of oxy-diphthalic anhydrides
摘要:
Oxy-diphthalic anhydrides are prepared by reacting a halophthalic anhydride with water and an alkali metal compound such as KF, CsF or K.sub.2 CO.sub.3 in the presence of a polar, aprotic solvent.
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