Pilot Process And Industrial Engineering Design For Continuous Production Of P-aminophenol

This thesis deals with pilot process and industrial engineering design for continuous production of p-aminophenol through hydrolysis of 4-nitrobenzene chloride followed by hydrogenation catalyzed by Pt/C. All the parameters of the hydrolysis and hydrogenation reactions have have been optimized in pilot scale and engineering for industrial production of p-aminophenol with capability of ten thousands of tons has been built.Compared with the traditional process that based on reduction of p-nitrophenol with iron powder, the continuous process of Pt/C catalyzed hydrogenation is obviously clean and efficient, leading to a sharp reduce of wastes and cost as well as providing higher qulity of p-nitrophenol with more than 98% content and less than 100mg/kilogram Fe residue in the product, therefore being more competitive. Also, the production capability of our continuous process could be significantly increased from the currently used batch-wise process.Based on the pilot results of the continuous process, a production line for 10 thousands ton of p-aminophenol per year has been designed and built in our company.