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- W1567187510 abstract "The alkylation of aniline with methanol was studied over a series of middly acidic AlPO4 and AlPO4-metal oxide (25 wt% Al2O3. TiO2 or ZrO2) catalysts prepared in different ways. Surface acidity was measured by pyridine adsorption and its effect on aniline alkylation activity is discussed. The influence of feed rate, time-on-stream and temperature on the activity and selectivity of the products, namely N-methyl (NMA) and N,N-dimethylaniline (NNDMA) were also investigated. Selectivity to N-alkylation (NMA+NNDMA) attained 100 mol% in the temperature range 523–623 K. Besides, N-methylaniline decreased as contact time/temperature increased. At 673 K, N,N-dimethyltoluidines (NNDMT, p->o-) appeared, although in very small amounts. AlPO4-Al2O3 proved to be a better catalyst for aniline methylation than AlPO4. Moreover, AlPO4-ZrO2 shows little acidity and hence decreased methylation ability with respect to AlPO4." @default.
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- W1567187510 date "1997-01-01" @default.
- W1567187510 modified "2023-09-22" @default.
- W1567187510 title "N-methylation of aniline over AlPO4 and AlPO4-metal oxide catalysts" @default.
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- W1567187510 doi "https://doi.org/10.1016/s0167-2991(97)80896-8" @default.
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