42.
    发明专利
    未知

    公开(公告)号:BRPI0717756A2

    公开(公告)日:2013-10-22

    申请号:BRPI0717756

    申请日:2007-10-29

    Applicant: BASF SE

    Abstract: In a process for producing water-absorbing polymeric particles which comprises generating droplets comprising monomers, polymerizing the monomers in a heated gas phase surrounding the droplets and flowing the gas through the polymerization reactor, the temperature of the gas leaving the polymerization reactor is closed-loop controlled.

    45.
    发明专利
    未知

    公开(公告)号:AT491729T

    公开(公告)日:2011-01-15

    申请号:AT07820800

    申请日:2007-10-02

    Applicant: BASF SE

    Abstract: A process for preparing water-absorbing polymer beads by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, the initiator being added to the monomer solution from 0.5 to 60 seconds before the droplets are generated.

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