公开(公告)号：US10604611B2

公开(公告)日：2020-03-31

申请号：US14908823

申请日：2014-07-29

Applicant: BASF SE

Inventor： John Scott Barratt ,  Aleksandra Jelicic ,  Pascal Hesse ,  Oliver Soetje ,  Robert Haschick ,  Gabriela Eugenia Fonseca Zepeda ,  Shankara Narayanan Keelapandal Ramamoorthy ,  Sandra Jeck ,  Jelan Kuhn

IPC: C08F265/04 ,  C08J11/02 ,  C08F2/32 ,  B01J19/12 ,  B01D61/14 ,  B01J19/24 ,  B01J4/00 ,  B01D61/02 ,  C08J3/12 ,  C08F220/56 ,  C08F220/20 ,  C08F220/06 ,  C08F220/38 ,  C08F226/10

Abstract: A reverse-phase suspension polymerisation process for the manufacture of polymer beads comprising forming aqueous monomer beads of an aqueous solution comprising water-soluble ethylenically unsaturated monomer or monomer blend and polymerising the monomer or monomer blend to form polymer beads while suspended in a non-aqueous liquid, recovering polymer beads, and then cleaning the non-aqueous liquid in which the process comprises providing the non-aqueous liquid in a vessel (1), forming a suspension of monomer beads from the aqueous monomer or monomer blend in the 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, and then transferring the non-aqueous liquid from the suspension to a cleaning stage, in which the cleaning stage provides a cleaned non-aqueous liquid suitable for use in a reverse-phase suspension polymerisation process, which cleaning stage comprises 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 obtainable by the process or employing the apparatus. The invention further relates to a cleaned non-aqueous liquid obtainable by the process.