邻硝基氯苯连续化氨解制备邻硝基苯胺中试研究

Research on the Production Technology of o-nitroaniline by Continuous Aminolysising of o-nitrochlorobenzene

采用邻硝基氯苯为原料,研究了邻硝基氯苯的连续化氨解工艺,并通过了中试验证,重点考察了反应温度、停留时间、反应配比、氨水浓度对该氨解反应的影响。结果表明,采用三釜串联连续化氨解工艺,向一级氨解反应釜中进料,控制35%氨水进料量7.95 L/h,邻硝基氯苯进料量1.82 L/h,停留时间为10 h,反应压力约4.0～4.5 MPa,邻硝基氯苯的转化率可达到99.9%以上。

Adopting o - nitrochlorobenzene as raw material, process for aminolysis solution of o - nitrochlorobenzene and through the tests, the effects of reaction temperature, residence time, reaction ratio, ammonia concentration on the ammonolysis reaction. The results showed that using three reactors in series continuous ammonolysis process to the level of ammonia solution in the reactor feed, under the conditions of control 35% ammonia feed rate of 7.95 L/h, o -nitrochlo- robenzene feed rate of 1.82 L/h, the residence time of 10 h, and the reaction pressure of about 4. 0 -4. 5 MPa, the conversion of o - nitrochlorobenzene rate can reach more than 99.9%.