REVERSE-PHASE POLYMERISATION PROCESS

    公开(公告)号:CA2919311C

    公开(公告)日:2020-06-30

    申请号:CA2919311

    申请日:2014-07-29

    Applicant: BASF SE

    Abstract: A reverse-phase suspension polymerisation process for the manufacture of polymer beads comprising forming a suspension of monomer beads from the aqueous monomer or monomer blend in non-aqueous liquid, initiating polymerisation to form polymerising beads, removing a suspension of the polymer beads in non-aqueous liquid from the vessel and recovering, water soluble or water swellable polymer beads from the suspension, in which the non-aqueous liquid contains impurities which comprise particles, then transferring the non-aqueous liquid from the suspension to a cleaning stage, which provides a cleaned non-aqueous liquid suitable for use in a reverse-phase suspension polymerisation process by removing particles from the non-aqueous liquid in at least one filtration step. The invention also relates to the apparatus suitable for carrying out a reverse-phase suspension polymerisation and polymer beads obtained by the process or employing the apparatus.

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