微乳液法制备Pt/Al2O3催化剂及其催化氯代硝基苯选择加氢活性

化工进展

微乳液法制备Pt/Al2O3催化剂及其催化氯代硝基苯选择加氢活性

宋华1，汪淑影1，李锋1，李瑞峰2

1东北石油大学化学化工学院，黑龙江大庆163318；2大庆化工研究中心，黑龙江大庆 163714

出版日期:2011-04-05 发布日期:2011-04-05

Preparation of Pt/Al2O3 catalyst by microemulsion and its activity in selective hydrogenation of chloronitrobenzene

SONG Hua1，WANG Shuying1，LI Feng1，LI Ruifeng2

1School of Chemistry and Chemical Engineering，Northeast Petroleum University，Daqing 163318，Heilongjiang，China；2Daqing Chemical Engineering Research Center，Daqing 163714，Heilongjiang，China

Online:2011-04-05 Published:2011-04-05

摘要/Abstract

摘要：

采用十六烷基三甲基溴化铵（CTAB）/正丁醇/环己烷/H₂PtCl₆溶液的微乳体系，以N₂H₄·H₂O为还原剂，Al₂O₃为载体制备Pt/Al₂O₃催化剂。以邻氯硝基苯（o-CNB）选择加氢反应为探针，考察微乳液组成对Pt/Al₂O₃催化剂选择加氢活性的影响。运用XRD、XPS、IR、TEM和EDS对载体和催化剂进行表征。结果表明，微乳体系中CTAB∶正丁醇∶环己烷质量比9∶21∶70，3.6% H₂PtCl₆溶液中制备的Pt/Al₂O₃催化剂的o-CNB选择加氢活性最高。Pt粒子粒径5 nm左右，与载体之间没有明显的电子效应。对于取代位置不同的间、对氯硝基苯（m-CNB、p-CNB）加氢，Pt/Al₂O₃催化剂也表现出较高的催化活性。

Abstract:

Pt/Al₂O₃ catalyst was prepared from CTAB/butarol/cyclohexane/H₂PtCl₆ microemulsion，with hydrazine as reductant and Al₂O₃ as support. The effect of composition of microemulsion on the activity for selective hydrogenation over Pt/Al₂O₃ catalysts was studied by using o-chloronitrobenzene selective hydrogenation as a probe reaction. The support and catalyst were characterized by XRD，XPS，IR，TEM and EDS. The results showed that the Pt/Al₂O₃ catalyst made from the microemulsion with CTAB：butarol：cyclohexane mass ratio of 9∶21∶70 and H₂PtCl₆concentration of 3.6% exhibited the highest activity in selective hydrogenation of o-CNB. Pt particle size was about 5 nm，and the electronic effect between Pt particle and carrier was not significant. It was also found that Pt/Al₂O₃ catalyst also exhibited higher activity for the hydrogenation of m-chloronitrobenzene and p-chloronitrobenzene with different substituted positions.

宋华1，汪淑影1，李锋1，李瑞峰2. 微乳液法制备Pt/Al2O3催化剂及其催化氯代硝基苯选择加氢活性 [J]. 化工进展.

SONG Hua1，WANG Shuying1，LI Feng1，LI Ruifeng2. Preparation of Pt/Al2O3 catalyst by microemulsion and its activity in selective hydrogenation of chloronitrobenzene[J]. Chemical Industry and Engineering Progree.