Process for the manufacture of methacrylic or acrylic acid...

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260/521, 252/53.

B01J 27/14 (2006.01) B01J 23/64 (2006.01) B01J 27/186 (2006.01) C07C 51/23 (2006.01) C07C 51/25 (2006.01)

Patent

CA 1074772

ABSTRACT OF THE DISCLOSURE A catalyst comprising (1) palladium, (2) phosphorous, (3) antimony, (4) X and (5) oxygen wherein X denotes at least one element selected from the group consisting of potassium, sodium, rubidium, lithium, cerium, beryllium, magnesium, calcium, vanadium, strontium, zinc, thorium and rhenium. There is also provided a process for the manufacture of methacrylic of acrylic acid by oxidizing methacrolein or acrolein with molecular oxygen in the vapor phase in the presence of the catalyst defined above.

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