Processes for making methacrylic acid
AssigneesWashington State University, Archer Daniels Midland Company
InventorsJunming Sun, Changjun Liu, Yong Wang, Kevin Martin, Padmesh Venkitasubramanian
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Abstract
Processes are described for making methacrylic acid via methacrolein from a biobased isobutene, wherein the biobased isobutene is prepared from ethanol or from acetic acid in the presence of a ZnxZryOz mixed oxide catalyst, the biobased isobutene is oxidized to methacrolein and the methacrolein is further oxidized to methacrylic acid.
Claims3
A process for making methacrylic acid via methacrolein from a biobased isobutene, comprising converting ethanol to isobutene in the presence of a mixed oxide catalyst comprised of oxides of Zn and Zr and containing less than about 0.14 percent by weight of sulfur and in which the ratio of Zn:Zr is from about 1:100 to about 10:1, oxidizing the isobutene to methacrolein with a source of oxygen in the presence of a catalyst and further oxidizing methacrolein to methacrylic acid with a source of oxygen in the presence of a catalyst.
Dependencies are inferred from the claim text.