Cu-Cr-La/γ-Al2O3催化N,N'-二仲丁基对苯二胺合成

摘要

以对硝基苯胺与丁酮为原料,Cu-Cr-La/γ-Al₂O₃为催化剂,在高压釜中合成了N,N'-二仲丁基对苯二胺。考察了催化剂的选用、反应温度、反应时间、反应压力和反应物的配比对反应的影响。通过优化工艺,得到了合成N,N'-二仲丁基对苯二胺的适宜反应条件为:反应温度180 ℃、反应时间10 h、反应压力3.5 MPa、对硝基苯胺与丁酮的质量比为1:4。此条件下得到的产品质量分数为97.0%,原料转化率达100%。催化剂循环套用3次,产品质量分数和原料转化率没有明显的下降。并在实验室小试的基础上,成功地进行了中试实验。

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	段一帆
	陈立功
	闫喜龙

关键词： N N'-二仲丁基对苯二胺 Cu-Cr-La/&gamma -Al₂O₃ 合成催化

Abstract：

N,N'-Di-sec-butyl p-phenylene diamine (DBPD) was prepared from p-nitroaniline and butanone catalyzed by Cu-Cr-La/γ-Al₂O₃ in autoclave. The effects of the selection of catalyst, reaction temperature, reaction time, reaction pressure and the ratio of the reactants on the reaction were investigated. The optimum reaction condition for synthesis of DBPD was as follows: reaction temperature was 180 ℃, reaction time was 10 h, reaction pressure was 3.5 MPa, the mass ratio of p-nitroaniline and butanone was 1:4. The best reaction condition resulted in the target product with 97.0% purity and the conversion of p-nitroaniline was 100%. The catalysts could be reused three times without any significant loss in activity. On the basis of experiment in the laboratory, pilot experiment was carried out successfully.

Keywords： DBPD； Cu-Cr-La/γ-Al₂O₃； synthesis； catalyze

Received 2014-04-20;

Corresponding Authors: 闫喜龙,E-mail:yan@tju.edu.cn。 Email: yan@tju.edu.cn

About author: 段一帆(1988-),男,硕士研究生,主要研究方向为精细化学品的合成及应用性能研究。

引用本文:

段一帆, 陈立功, 闫喜龙.Cu-Cr-La/γ-Al₂O₃催化N,N'-二仲丁基对苯二胺合成[J]. 化学工业与工程, 2016,33(2): 45-51

Duan Yifan, Chen Ligong, Yan Xilong.Synthesis of N,N'-Di-sec-Butyl p-Phenylene Diamine Catalyzed by Cu-Cr-La/γ-Al₂O₃[J]. Chemcial Industry and Engineering, 2016,33(2): 45-51

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