Modification on a Synthetic Method of 2,4 Dinitrophenol

Abstract A two��step method for synthesizing 2,4 dinitrophenol from 2,4 dinitrochlorobenzene (��) has been significantly modified.Experiments in a 1000mL flask show that the optimum hydrolytic temperature and reaction time are 91��102�� and 2 5h respectively,acidizing temperature is 70��,the optimum molar ratio of the three reactants (2,4 dinitrochlorobenzene ��,sodium hydroxide ��,hydrochloric acid ��)is ��â�â�=1��(2 08��2 23)��(1 11��1 23),and the optimum stirring speed is 400��500r/min. According to the conditions above,a 60t/a industrial plant ran successtully by changing stirring speed to 136r/min. By acidizing directly after complete hydrolysis,the new process is much simpler,produces less waste water,and the yield is 98%.

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Keywords�� Dinitrophenol 2 4 Dinitrochlorobenzene hydrolysis acidization

Received 1997-10-15;

Cite this article:

Zeng Bingwei Zhang Zhongzhi Gao Hongshun Ding Wenguang Zhou Jianping .Modification on a Synthetic Method of 2,4 Dinitrophenol[J] Chemcial Industry and Engineering, 1997,V14(4): 54-59