Preparation method of 4, 4 '-diphenyl ether diformyl chloride

The invention discloses a preparation method of 4, 4 '-diphenyl ether dicarbonyl chloride, which comprises the following steps of: synthesizing 4, 4'-diphenyl ether dicarboxamide by using diphenyl ether as a raw material and utilizing Friedel-Crafts acylation reaction, and then performing hydrolysis and acylating chlorination to obtain a final product. Compared with the steps of high-temperature ether formation, oxidation acid formation and the like in the existing method, the method disclosed by the invention is lower in cost and energy consumption, higher in yield, safer, simple to operate and easy for industrial production, and the molar yield can reach 90%. 本发明公开了一种4,4'-二苯醚二甲酰氯的制备方法，包括以下步骤：以二苯醚为原料，利用傅克酰基化反应，合成4,4'-二苯醚二甲酰胺，然后经水解、酰氯化两步得到最终产物。本发明相对现有方法中的高温成醚、氧化成酸等步骤，不仅成本与能耗更低，而且收率更高，摩尔收率可达90％，更加安全，操作简单，易于工业化生产。