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Kinetic investigation of methacrylic acid synthesis on hetropoly‐compounds
Author(s) -
Haeberle Thomas,
Emig Gerhard
Publication year - 1988
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270110151
Subject(s) - methacrylic acid , catalysis , isobutyric acid , phosphoric acid , molybdenum , chemistry , solid acid , kinetics , inorganic chemistry , yield (engineering) , chemical engineering , organic chemistry , materials science , copolymer , metallurgy , physics , quantum mechanics , engineering , polymer
The kinetics of heterogeneously catalyzed methacrylic acid synthesis from isobutyric acid has been investigated. Initial catalyst screening pointed to 10‐molybdo‐2‐vanado‐phosphoric acid and its Cs‐salts as the most promising catalysts. A model describing the reaction behaviour of all the different hetropoly‐compounds used in this work was developed. A relationship was found between model parameters and composition of different catalysts. First insight was gained into the catalyst deactivation phenomena. Deactivation appears to be caused mainly by loss of molybdenum with simultaneous collapse of the Keggin structure.