Inventors:
Wugeng Liang - Katy TX, US
Scott A. Stevenson - Houston TX, US
Angie McGuffey - Sugar Land TX, US
Joseph R. Linzer - Houston TX, US
Assignee:
Saudi Basic Industries Corporation
International Classification:
C07C 51/16
C07C 51/235
B01J 27/00
B01J 27/198
B01J 27/19
B01J 27/192
US Classification:
562531, 562532, 562533, 562535, 502208, 502209, 502211, 502212
Abstract:
A heteropolyacid catalyst for oxidation of isobutyraldehyde, methacrolein or mixtures or combinations thereof to methacrylic acid is disclosed where the heteropolyacid catalyst includes at least molybdenum (Mo), phosphorus (P), vanadium (V), and a first component including bismuth (Bi) and/or boron (B). The heteropolyacid catalyst can also optionally include a second component including potassium (K), rubidium (Rb), cesium (Cs), and/or thallium (Tl) and optionally a third component including antimony (Sb), cerium (Ce), niobium (Nb), indium (In), iron (Fe), chromium (Cr), cobalt (Co), nickel (Ni), manganese (Mn), arsenic (As), silver (Ag), zinc (Zn), germanium (Ge), gallium (Ga), zirconium (Zr), magnesium (Mg), barium (Ba), lead (Pb), tin (Sn), titanium (Ti), aluminum (Al), silicon (Si), tantalum (Ta), tungsten (W), and/or lanthanum (La). The heteropolyacid catalyst can also include an ammonium-containing compound designed to increase a value of medium pores in the final heteropolyacid catalyst. A method for oxidizing isobutanal to methacrylic acid using the heteropolyacid catalyst is also disclosed.