| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a diaminodiphenyl ether in a high yield with stable high quality via a stepwise producing process which uses an aminophnol and a chloronitrobenzene as starting materials and comprising an etherification process, a hydrogen addition process and a distillation purifying process, by quickly and accurately measuring a solution composition in each reaction process and reflecting the results of measurement to the automatic control of the process. SOLUTION: The diaminodiphenyl ether with stable high quality is produced in high yield by installing near infrared absorption spectroscopic arrangements and directly measuring compositions of the solution in etherification, hydrogen addition and distillation purification processes which allow the accurate measurement of the reaction condition and purification condition and continuous downloading of the results to a distributed process control system for automatic calculation and control. COPYRIGHT: (C)2006,JPO&NCIPI
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