23.
    发明专利
    未知

    公开(公告)号:BRPI0415171A

    公开(公告)日:2006-11-28

    申请号:BRPI0415171

    申请日:2004-10-02

    Applicant: BASF AG

    Abstract: The invention relates to a method for rectification separation of an acrylic acid-containing liquid consisting in supplying an acrylic acid-rich material flow to a rectification column upstream of a supplying area and in carrying out an inhibiting polymerisation in the top section of the rectification column with the aid of diacrylic acid.

    METHOD FOR THE RECTIFYING SEPARATION OF FLUIDS CONTAINING (METH)ACRYL MONOMERS

    公开(公告)号:AU2003258504A1

    公开(公告)日:2004-01-23

    申请号:AU2003258504

    申请日:2003-07-02

    Applicant: BASF AG

    Abstract: A process for rectificatively separating at least one (meth)acrylic monomer-containing fluid by feeding the fluid into a rectification column containing at least one sieve tray without a runoff segment, wherein an elementary cell is obtained from a number of centers of passages in a sieve tray, and the cell shifts regularly and repeatedly along its edges, the lengths of two shifting vectors being the lengths of the edges of the cell along which the shifting is effected; an arrangement of the centers is such that the positions of an ideal center and a real center are separated by

    28.
    发明专利
    未知

    公开(公告)号:DE10230219A1

    公开(公告)日:2004-01-22

    申请号:DE10230219

    申请日:2002-07-04

    Applicant: BASF AG

    Abstract: A process for rectificatively separating at least one (meth)acrylic monomer-containing fluid by feeding the fluid into a rectification column containing at least one sieve tray without a runoff segment, wherein an elementary cell is obtained from a number of centers of passages in a sieve tray, and the cell shifts regularly and repeatedly along its edges, the lengths of two shifting vectors being the lengths of the edges of the cell along which the shifting is effected; an arrangement of the centers is such that the positions of an ideal center and a real center are separated by

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