1998
DOI: 10.1021/jp972677n
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Oxidation of Isobutane Catalyzed by Partially Salified Cesium Molybdovanadophosphoric Acids

Abstract: The catalytic activity for the oxidation of isobutane catalyzed by 12-molybdophosphoric acid was much changed by the V5+- and Cs+-substitution for Mo6+ and H+, respectively. The best yield of methacrylic acid was 9.0% and was obtained for the heteropoly catalyst with V and Cs contents of 1 and 2.5, respectively. The high catalytic activity obtained for Cs2.5Ni0.08H1.34PVMo11O40 is presumably due to the high surface area. The activities of 12-molybdovanadophosphoric acids as well as those of 12-molybdophosphori… Show more

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Cited by 52 publications
(31 citation statements)
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“…The methacrylic acid formation displayed by the BaH[PMo 12 O 40 ] compound matches one Previous studies have proposed that isobutene acts as an intermediate for methacrolein and methacrylic acid production [46,50,[67][68][69], although other authors dispute this claim [70][71][72]. Similarly, some studies indicate that methacrolein is an intermediate in the formation of methacrylic acid [45,49,69], while others give evidence negating this finding [70,72,73]. Previous work has indeed shown methacrolein and methacrylic acid production from respective isobutene and methacrolein oxidations over heteropoly compounds [20,71,[74][75][76][77].…”
Section: Reaction Mechanismsmentioning
confidence: 57%
See 1 more Smart Citation
“…The methacrylic acid formation displayed by the BaH[PMo 12 O 40 ] compound matches one Previous studies have proposed that isobutene acts as an intermediate for methacrolein and methacrylic acid production [46,50,[67][68][69], although other authors dispute this claim [70][71][72]. Similarly, some studies indicate that methacrolein is an intermediate in the formation of methacrylic acid [45,49,69], while others give evidence negating this finding [70,72,73]. Previous work has indeed shown methacrolein and methacrylic acid production from respective isobutene and methacrolein oxidations over heteropoly compounds [20,71,[74][75][76][77].…”
Section: Reaction Mechanismsmentioning
confidence: 57%
“…Methacrylic acid has been shown to form from the oxidation of isobutane over heteropoly compounds such as phosphomolybdates [7,[44][45][46][47][48][49][50]. Typically, methacrylic acid is not formed for isobutane selective oxidation with the low-pressure TPRS system employed in this study [22][23][24].…”
Section: Detection Of Methacrylic Acidmentioning
confidence: 99%
“…The lactone has not been reported by other research groups. Methacrylic acid was an expected product and is commonly reported from catalytic oxidations conducted using higher pressures and non-molecular flow conditions [2,3,5,9,[26][27][28][29][30][31][32][33][34][35][36][37][38][39][40], but was not observed. The lactone is an isomer of methacrylic acid and its appearance, and the concomitant absence of methacrylic acid, suggests that it is an intermediate for methacrylic acid.…”
Section: Introductionmentioning
confidence: 96%
“…In the past decades, studies have focused mainly on one-step oxidation of isobutane to partial oxidation products via Keggin-type heteropolyoxometallate compounds [1][2][3][4][5] or mixed oxide catalysts [6][7][8][9][10]. Methacrolein (MAL) and methacrylic acid (MAA) are the key intermediates in one of the existing processes for the production of methyl methacrylate.…”
Section: Introductionmentioning
confidence: 99%