Phenol methylation over CrPO4 and CrPO4?AlPO4 catalysts |
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Authors: | F. M. Bautista J. M. Campelo A. Garcia D. Luna J. M. Marinas A. A. Romero M. R. Urbano |
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Affiliation: | (1) Department of Organic Chemistry, Sciences Faculty, Cordoba University, Avda. S. Alberto Magno, s/no, E-14004 Cordoba, Espa?a |
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Abstract: | The vapor-phase catalytic alkylation of phenol with methanol and dimethyl carbonate on a series of differently prepared CrPO4 (Cr/P=1) and CrPO4-AlPO4 (CrAIP) catalysts, has been studied at different temperatures (473–673 K). The reaction is first order in phenol, giving a mixture of O- and C-alkylated products (C-alkylation taking place preferentially at theortho-position). Moreover, dimethyl carbonate is a better methylating agent than methanol. |
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Keywords: | chromium orthophosphate (CrPO4) chromium aluminium orthophosphates (CrPO4-AIPO4) surface acidity, phenol/methanol and phenol/dimethyl carbonate alkylation activity selectivity |
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