HETEROGENEOUSLY CATALYZED PARTIAL GAS PHASE OXIDATION OF PROPENE TO ACRYLIC ACID

    公开(公告)号:MY135109A

    公开(公告)日:2008-02-29

    申请号:MYPI20040666

    申请日:2004-02-27

    Applicant: BASF AG

    Abstract: IN A PROCESS FOR HETEROGENEOUSLY CATALYZED PARTIAL GAS PHASE OXIDATION OF PROPENE TO ACRYLIC ACID , THE PROPENE-CONTAINING STARTING REACTION GAS MIXTURE IS OXIDIZED IN A FIRST REACTION STAGE USING A FIXED CATALYST BED 1 WHICH CONSISTS OF A PLURALITY OF FIXED CATALYST BED ZONES AND IS ACCOMMODATED IN TWO SUCCESSIVE TEMPERATURE ZONES A,B, AND THE ACROLEIN-CONTAINING PRODUCT GAS MIXTURE OF THE FIRST REACTION STAGE IS THEN OXIDIZED IN A SECOND REACTION STAGE USING A FIXED CATALYST BED 2 WHICH CONSISTS OF A PLURALITY OF FIXED CATALYST BED ZONES AND IS ACCOMMODATED IN TWO SUCCESSIVE TEMPERATURE ZONES C,D, AND THE TRANSITION FROM ONE TEMPERATURE ZONE TO ANOTHER TEMPERATURE ZONE WITHIN ONE REACTION STAGE DOES NOT SPATIALLY COINCIDE WITH A TRANSITION FROM ONE FIXED CATALYST BED ZONE TO ANOTHER FIXED CATALYST BED ZONE.

    PURIFICATION OF A CRUDE ACRYLIC ACID MELT

    公开(公告)号:MY128539A

    公开(公告)日:2007-02-28

    申请号:MYPI20011715

    申请日:2001-04-10

    Applicant: BASF AG

    Abstract: IN A PROCESS FOR THE PURIFICATION OF A CRUDE ACRYLIC ACID MELT, THE CRUDE ACRYLIC ACID MELT IS CONVERTED, UNDER THE ACTION OF LOW TEMPERATURES, INTO A CRUDE ACRYLIC ACID SUSPENSION CONSISTING OF ACRYLIC ACID CRYSTALS AND RESIDUAL MELT, AND THE ACRYLIC ACID CRYSTALS OF THE CRUDE ACRYLIC ACID SUSPENSION ARE FREED FROM REMAINING RESIDUAL MELT IN A WASH COLUMN, THE PRODUCTION OF THE ACRYLIC ACID CRYSTALS OF THE CRUDE ACRYLIC ACID SUSPENSION BEING CARRIED OUT IN THE PRESENCE OF WATER, THE WASH COLUMN BEING A WASH COLUMN WITH FORCED TRANSPORT OF THE ACRYLIC ACID CRYSTALS AND THE WASH LIQUID USED BEING THE MELT OF ACRYLIC ACID CRYSTALS PURIFIED IN THE WASH COLUMN.

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