FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2122370086> ?p ?o ?g. }

• W2122370086 endingPage "695" @default.
• W2122370086 startingPage "688" @default.
• W2122370086 abstract "The acid–base properties of vanadium phosphate catalysts are investigated using the aldol condensation of acetone and the reactions of 2-methylbut-3-yn-2-ol (MBOH). Three well characterised samples of VOHPO4·0.5H2O were prepared using the reaction of V2O5 and H3PO4 with aqueous hydrochloric acid or isobutanol as reducing agents, or from the reaction of VOPO4.2H2O with isobutanol. (VO)2P2O7, prepared by heating VOHPO4·0.5H2O in He (8 h, 750 °C), before and following partial oxidation in air or butane/air, and αI-VOPO4 were also investigated. The reaction of MBOH was used to probe the nature of the acid–base properties of the vanadium phosphates. The V4+ phases (VOHPO4·0.5H2O and (VO)2P2O7) exhibited only acidic active sites, whereas the V5+ phases (αI-VOPO4 and oxidised (VO)2P2O7) exhibited some basic sites in addition to the acid sites. For the aldol condensation reactions of acetone, the V4+ phases were found to be selective for the formation of isophorone from acetone alone and methyl vinyl ketone from the reaction of acetone and formaldehyde. In contrast, vanadium phosphate catalysts containing V5+ phases are not selective to these products and only form hydrocarbons (typically isobutane and isobutene). For all these reactions, the catalyst activity is short lived and the deactivation that is observed is due to the surface becoming fouled by the adsorption of products of polymerisation of the reaction products. However, the catalyst reactivity can be restored by a simple oxidation treatment. The nature of active sites in n-butane oxidation to maleic anhydride is also discussed and it is concluded that basic sites are required in addition to acidic surface sites for the selective formation of maleic anhydride. For the reaction of MBOH, the data are found to give a linear relationship for a Cremer–Constable plot and this is discussed in terms of the enthalpy of adsorption of MBOH." @default.
• W2122370086 created "2016-06-24" @default.
• W2122370086 creator A5015086974 @default.
• W2122370086 creator A5017783032 @default.
• W2122370086 creator A5020068159 @default.
• W2122370086 creator A5036348358 @default.
• W2122370086 creator A5058391813 @default.
• W2122370086 creator A5066054147 @default.
• W2122370086 creator A5074298022 @default.
• W2122370086 date "2002-01-09" @default.
• W2122370086 modified "2023-10-12" @default.
• W2122370086 title "Aldol condensation reactions of acetone and formaldehyde over vanadium phosphate catalysts: Comments on the acid–base properties" @default.
• W2122370086 cites W1027417886 @default.
• W2122370086 cites W1488127415 @default.
• W2122370086 cites W1561431887 @default.
• W2122370086 cites W1966966921 @default.
• W2122370086 cites W1967650712 @default.
• W2122370086 cites W1968011224 @default.
• W2122370086 cites W1970834308 @default.
• W2122370086 cites W1972124901 @default.
• W2122370086 cites W1973758691 @default.
• W2122370086 cites W1976142669 @default.
• W2122370086 cites W1977189592 @default.
• W2122370086 cites W1977576564 @default.
• W2122370086 cites W1988148113 @default.
• W2122370086 cites W1989592369 @default.
• W2122370086 cites W2000473502 @default.
• W2122370086 cites W2001243193 @default.
• W2122370086 cites W2004468406 @default.
• W2122370086 cites W2007979290 @default.
• W2122370086 cites W2012580137 @default.
• W2122370086 cites W2015772487 @default.
• W2122370086 cites W2016087156 @default.
• W2122370086 cites W2017324593 @default.
• W2122370086 cites W2032006669 @default.
• W2122370086 cites W2033731765 @default.
• W2122370086 cites W2034881626 @default.
• W2122370086 cites W2034903675 @default.
• W2122370086 cites W2046433005 @default.
• W2122370086 cites W2050306362 @default.
• W2122370086 cites W205442679 @default.
• W2122370086 cites W2059794555 @default.
• W2122370086 cites W2065578929 @default.
• W2122370086 cites W2066738777 @default.
• W2122370086 cites W2071087366 @default.
• W2122370086 cites W2080528931 @default.
• W2122370086 cites W2084513590 @default.
• W2122370086 cites W2089391467 @default.
• W2122370086 cites W2094301744 @default.
• W2122370086 cites W2104851373 @default.
• W2122370086 cites W2108075072 @default.
• W2122370086 cites W2129934688 @default.
• W2122370086 cites W2951306555 @default.
• W2122370086 cites W422944552 @default.
• W2122370086 cites W6482013 @default.
• W2122370086 doi "https://doi.org/10.1039/b108794k" @default.
• W2122370086 hasPublicationYear "2002" @default.
• W2122370086 type Work @default.
• W2122370086 sameAs 2122370086 @default.
• W2122370086 citedByCount "21" @default.
• W2122370086 countsByYear W21223700862013 @default.
• W2122370086 countsByYear W21223700862014 @default.
• W2122370086 countsByYear W21223700862015 @default.
• W2122370086 countsByYear W21223700862016 @default.
• W2122370086 countsByYear W21223700862017 @default.
• W2122370086 countsByYear W21223700862018 @default.
• W2122370086 countsByYear W21223700862020 @default.
• W2122370086 countsByYear W21223700862021 @default.
• W2122370086 countsByYear W21223700862022 @default.
• W2122370086 crossrefType "journal-article" @default.
• W2122370086 hasAuthorship W2122370086A5015086974 @default.
• W2122370086 hasAuthorship W2122370086A5017783032 @default.
• W2122370086 hasAuthorship W2122370086A5020068159 @default.
• W2122370086 hasAuthorship W2122370086A5036348358 @default.
• W2122370086 hasAuthorship W2122370086A5058391813 @default.
• W2122370086 hasAuthorship W2122370086A5066054147 @default.
• W2122370086 hasAuthorship W2122370086A5074298022 @default.
• W2122370086 hasConcept C161790260 @default.
• W2122370086 hasConcept C178790620 @default.
• W2122370086 hasConcept C179104552 @default.
• W2122370086 hasConcept C185592680 @default.
• W2122370086 hasConcept C18616679 @default.
• W2122370086 hasConcept C2775930285 @default.
• W2122370086 hasConcept C2777738585 @default.
• W2122370086 hasConcept C2778717364 @default.
• W2122370086 hasConcept C2778861962 @default.
• W2122370086 hasConcept C2781213060 @default.
• W2122370086 hasConcept C504678139 @default.
• W2122370086 hasConceptScore W2122370086C161790260 @default.
• W2122370086 hasConceptScore W2122370086C178790620 @default.
• W2122370086 hasConceptScore W2122370086C179104552 @default.
• W2122370086 hasConceptScore W2122370086C185592680 @default.
• W2122370086 hasConceptScore W2122370086C18616679 @default.
• W2122370086 hasConceptScore W2122370086C2775930285 @default.
• W2122370086 hasConceptScore W2122370086C2777738585 @default.
• W2122370086 hasConceptScore W2122370086C2778717364 @default.
• W2122370086 hasConceptScore W2122370086C2778861962 @default.
• W2122370086 hasConceptScore W2122370086C2781213060 @default.

• next