To provide a new catalytic gas-phase oxidation method of propene to acrylic acid.
There is provided a method for the catalytic gas-phase oxidation of propene to acrylic acid, in which the reaction gas starting mixture is oxidized, with a high propene loading, in a first reaction stage, over a first fixed-bed catalyst which is housed in two successive reaction zones A, B, (the reaction zone B being kept at a higher temperature than the reaction zone A), and the acrolein-containing product gas mixture of the first reaction stage is then oxidized in a second reaction stage, with a high acrolein loading, over a second fixed-bed catalyst which is housed in two successive reaction zones C, D, (the reaction zone D being kept at a higher temperature than the reaction zone C).
ARNOLD HEIKO
TENTEN ANDREAS
HAMMON ULRICH DR
NEUMANN HANS-PETER
HARTH KLAUS
Toshio Yano
Takahashi
Kimihiro Hoshi
Hiroyasu Ninomiya
Ryoichi Shino
Einzel Felix-Reinhard