介绍了国内外各种制备均苯四甲酸二酐的方法,并对各方法的优缺点进行对比,得到采用一氧化碳羰基化法制备均苯四甲酸二酐是较佳工艺路线,该法副反应少,产品纯度高,收率高,选择性好,对设备的腐蚀性小。目前研究的重点是开发新型高效、廉价的催化剂。 The methods of preparing pyromellitic dianhydride at home and abroad are introduced, and the advantages and disadvantages of each method are compared. It is found that the preparation of pyromellitic dianhydride by carbonylation of carbon monoxide is a better process route. , Product purity, high yield, good selectivity, the corrosion of the equipment is small. The current research focuses on the development of new efficient, cheap catalyst.