PROCESS FOR THE PREPARATION OF UNSATURATED ACIDS FROM UNSATURATED ALDEHYDES

    公开(公告)号:CA1059532A

    公开(公告)日:1979-07-31

    申请号:CA258069

    申请日:1976-07-29

    Abstract: PROCESS FOR THE PREPARATION OF UNSATURATED ACIDS FROM UNSATURATED ALDEHYDES Methacrylic acid or acrylic acid are produced by the oxidation of methacrolein or acrolein respectively, with molecular oxygen in the vapor phase in the presence of a catalytic oxide of molybdenum, phosphorus, and promoted with chromium or at least one element selected from the group consisting of thallium, rubidium, cesium, potassium, titanium and arsenic, or a mixture thereof, wherein at least part of the molybdenum employed in the preparation of the catalyst is supplied in the form of molybdenum trioxide. The oxidation of methacrolein in the presence of a catalyst wherein all the molybdenum employed in the preparation of the catalyst has been supplied by molybdenum trioxide gives especially desirable high yields and selectivities to methacrylic acid.

Patent Agency Ranking