PROCESS FOR PREPARING ACRYLIC ACID WITH HIGH SPACE-TIME YIELD

    公开(公告)号:ZA201508898B

    公开(公告)日:2019-04-24

    申请号:ZA201508898

    申请日:2015-12-07

    Applicant: BASF SE

    Abstract: In a process for preparing acrylic acid, a reaction gas which comprises a gaseous formaldehyde source and gaseous acetic acid and in which the partial pressure of the formaldehyde source, calculated as formaldehyde equivalents, is at least 85 mbar and in which the molar ratio of the acetic acid to the formaldehyde source, calculated as formaldehyde equivalents, is at least 1 is contacted with a solid condensation catalyst. The space-time yield can be enhanced significantly by increasing the partial pressure of the reactants. The space-time yield remains high even after prolonged process duration.

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