MVPC-KCWPAV catalyst: Enhanced performance for isobutene oxidation to methacrylic acid

The production of methacrylic acid from isobutylene has significant economic benefits, but the MAA selectivity of existing catalysts is low. Therefore, the MVPC-KCWPAV catalyst with excellent performance was designed and prepared successfully. The catalyst is composed of MVPC with high adsorption and activation properties and KCWPAV with excellent MAA selectivity. The one-step oxidation of isobutylene showed that the MVPC-KCWPAV catalyst had significantly improved MAA selectivity, MAA selectivity could reach 70% and isobutylene conversion could reach 93%. XRD, FTIR and O 2 -TPD characterization tests showed that the reason for the improvement of MVPC-KCWPAV catalyst was the existence of relay synergy between the MVO active site and Keggin acid active site. This provides an experimental basis for the isobutene one-step synthesis of MAA, and also provides a new theoretical basis for the isobutene green process.