Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2006-02-14
2006-02-14
Tsang, Cecilia J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S544000, C562S546000, C562S600000
Reexamination Certificate
active
06998504
ABSTRACT:
A process 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.
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Arnold Heiko
Hammon Ulrich
Harth Klaus
Neumann Hans-Peter
Tenten Andreas
BASF - Aktiengesellschaft
Oh Taylor Victor
Tsang Cecilia J.
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