| abstract |
A PROCESS FOR THE PREPARATION OF AN UNSATURATED CARBOXYLIC ACID WHICH COMPRISES REACTING AN UNSATURATED ALDEHYDE WITH MOLECULAR OXYGEN AT AN ELEVATED TEMPERATURE IN THE VAPOR PHASE, IN THE PRESENCE OF AN OXIDATION CATALYST REPRESENTED BY THE FOLLOWING EMPIRICAL FORMULA MOAPBQCRDOE WHEREIN Q IS AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF TI, RB, CS AND K; AND R IS AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF CR, SI, AL, GE AND TI: AND A, B, C, D AND E EACH REPRESENT THE NUMBER OF ATOMS OF EACH ELEMENT: THE ATOMIC RATIO OF A:B:C:D IS 1:1.01.01:1-0.01:2-01; AND E IS THE NUMBER OF OXYGEN ATOMS DETERMINED BY THE VALENCE REQUIREMENTS OF THE OTHER ELEMENTS PRESENT. |