Selective N-methylation of aniline by calcined Mg-II-Al-III layered double hydroxides

被引：44

作者：

Santhanalakshmi, J

Raja, T

机构：

[1] Department of Physical Chemistry, University of Madras, Guindy Campus

来源：

APPLIED CATALYSIS A-GENERAL | 1996年 / 147卷 / 01期

关键词：

Mg-II-Al-III layered double hydroxide N-methylation; acid-base solid catalysts; Mg-II-Al-III hydrotalcite-like compounds;

D O I：

10.1016/S0926-860X(96)00190-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Gas phase N-methylation of aniline with methanol was carried out in a fixed bed flow reactor over the calcined Mg-II-Al-III layered double hydroxides (LDH) with various atomic ratios of Mg:Al from 3 to 10. Only a single product (N-methylaniline) was formed. The catalytic activity, selectivity, longevity, time on stream and reactivations are investigated based on the extent of mono-alkylated product formations. All calcined LDHs were more active than the physical mixtures of MgO-Al2O3. A higher surface area and lattice parameter of 4:1 mole ratio of calcined LDHs effectively produced a maximum conversion of 68% at 425 degrees C at a feed mixture mole ratio of 1:7 (aniline to methanol) when the flow rate was 5 ml/h over all other catalysis.

引用

页码：69 / 80

页数：12

共 36 条

[11] INORGANIC SOLID ACIDS AND THEIR USE IN ACID-CATALYZED HYDROCARBON REACTIONS [J].