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采用常温常压下的碱熔融法 ,由 4 -氯代邻苯二甲酸酐制备 4 -羟基邻苯二甲酸酐 ,测定了产物的理化性质和红外光谱、核磁共振氢谱 ,考察了温度和反应物、添加剂及碱用量等条件对产物收率和纯度的影响
The 4 - hydroxy phthalic anhydride was prepared from 4 - chlorophthalic anhydride by the alkali melting method at normal temperature and pressure. The physicochemical properties, infrared spectra and 1H - NMR spectra of the product were determined. The effects of temperature and reaction time The influence of the conditions of the product, additives and alkali on the yield and purity of the product