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- W1556657629 abstract "Vapor phase catalytic alkylation of phenols with methanol was carried out on various phosphates as catalysts. The best activity and selectivity was observed on soron, rare-earth and niobium phosphate. With boron phosphate, the reaction is very selective for O-alkylation even at high temperature. On this catalyst o-methoxy-phenol is selectively obtained from 1–2-dihydroxybenzene. With rareearth phosphate calcinated at 400°C and with niobium phosphate, O-alkylation selectivity decreases with an increase of reaction temperature. For rare-earth phosphates it is possible to improve the selectivity by calcination at higher temperature or by a wetness impregnation of cesium hydrogenophosphate. An explanation of these results is proposed." @default.
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- W1556657629 date "1996-01-01" @default.
- W1556657629 modified "2023-10-14" @default.
- W1556657629 title "Catalysis by rare earth phosphate II: Selective o-methylation of phenols by methanol in vapor phase" @default.
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- W1556657629 doi "https://doi.org/10.1016/s0926-9614(96)80009-8" @default.
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