摘要
在柱撑型非晶态合金Ni-B合金催化剂上,采用响应面法,对硝基苯加氢合成苯胺的工艺条件进行优化。在单因素实验的基础上,以苯胺收率为响应值,选取反应时间、反应温度、氢气初始压力和催化剂用量为自变量,采用Box-Behnken设计和响应面法,考察各自变量及其交互作用对苯胺收率的影响,得到了多项式回归方程。结果表明,硝基苯加氢合成苯胺的最佳工艺条件为:反应时间129min,反应温度114℃,氢气初始压力2.0MPa,催化剂用量1.9%。在此工艺条件下,苯胺的收率为90.11%,与预测值90.38%的绝对误差为0.27%,表明采用响应面法优化非晶态合金柱撑膨润土催化剂催化硝基苯合成苯胺的工艺参数,具有较高的准确性。该催化剂具有较高的稳定性,循环使用6次后,苯胺的收率仍保持在84.18%。
The response surface methodology was used to optimize the process conditions of nitrobenzene hydrogenation to aniline over pillared amorphous Ni-B alloy catalyst.Based on the single factor test,the aniline yield was used as the response value,and the reaction time,reaction temperature,hydrogen partial pressure and catalyst dosage were selected as independent variables,the influence of each variable and its interaction on the aniline yield was investigated by Box-Behnken design and response surface method,and the polynomial regression equation was obtained.The results showed that the optimum reaction conditions were as followed:the reaction time 129 min,the reaction temperature 114℃,the hydrogen partial pressure 2.0MPa,the catalyst dosage 1.9%.The yield of aniline was 90.11%under these conditions.Compared with the predicted value of 90.38%,the absolute error was 0.27%,which indicated that the response surface method optimized process parameters of synthesizing aniline from nitrobenzene had higher accuracy.After 6 times of repeated use,the yield of aniline could still be maintained at 84.18%,which indicated that the catalyst had higher stability.
作者
王燕华
曾德明
王浅朱
胡振丹
WANG Yanhua;ZENG Deming;WANG Qianzhu;HU Zhendan(Department of Safety Engineering,Guangxi Vocational College of Safety Engineering,Nanning 530100,China)
出处
《化工技术与开发》
CAS
2021年第8期21-26,共6页
Technology & Development of Chemical Industry
基金
2020年度广西高校中青年教师科研基础能力提升项目(2020KY51007)
广西安全工程职业技术学院2021年度校级科研课题(GAZY2021KYA005)。
关键词
非晶态催化剂
硝基苯
苯胺
催化加氢
amorphous catalyst
nitrobenzene
aniline
hydrogenation
