公开(公告)号：AU2006243231B2

公开(公告)日：2011-07-14

申请号：AU2006243231

申请日：2006-04-19

Applicant: BASF SE

Inventor： ANTHONY MORAN ,  IAN NAYLOR GARETH ,  SIMON BROUGHTON

IPC: C08F2/16 ,  C08F20/56

Abstract: The present invention provides a process for the preparation of polymer which comprises the steps of i) feeding an aqueous mixture comprising a monoethylenically unsaturated monomer or a mixture of monoethylenically unsaturated monomers and an initiator into the top of a reactor ii) polymerizing the monoethylenically unsaturated monomer to form a gel-like aqueous mixture comprising the polymer, iii) squeezing the gel-like aqueous mixture comprising the polymer out of the bottom of the reactor using inert gas, wherein the reactor is either a vertical fully conical reactor having an angle (alpha) between top diameter (dl) of the reactor and inner wall of the reactor of smaller than 90° but larger than 45° or is made up of 2 to 5 connected vertical fully conical parts, which are on top of one another, each having an angle between top diameter of the part and inner wall of the part of smaller than 90° but larger than 45°.

公开(公告)号：PH12016500139A1

公开(公告)日：2016-04-18

申请号：PH12016500139

申请日：2016-01-21

Applicant: BASF SE

Inventor： PASCAL HESSE ,  ALEKSANDRA JELICIC ,  ZEPEDA FONSECA ,  ROBERT HASCHICK ,  NARAYANAN KEELAPANDAL RAMAMOORTHY SHANKARA ,  IAN NAYLOR GARETH ,  SCOTT BARRATT JOHN ,  OLIVER SOETJE ,  MARCEL LIEVRE ,  FLORIAN RAINAU ,  MARK LEBKUCHER

IPC: C08F20/56 ,  C08F2/32

Abstract: A reverse-phase suspension polymerisation process for the manufacture of polymer beads comprising forming aqueous monomer beads comprising an aqueous solution of 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, and recovering polymer beads, in which the process comprises providing in a vessel (1) a volume (2) of non-aqueous liquid wherein the volume of non-aqueous liquid extends between at least one polymer bead discharge point (3) and at least one monomer feed point (4), feeding the aqueous monomer or monomer blend through orifices (5) into, or onto, the non-aqueous liquid to form aqueous monomer beads, allowing the aqueous monomer beads to flow towards the polymer bead discharge point initiating polymerisation of the aqueous monomer beads to form polymerising beads, wherein the polymerising beads form polymer beads when they reach the polymer bead discharge point, removing a suspension of the polymer beads in non-aqueous liquid from the vessel at the polymer bead discharge point and recovering, water soluble or water swellable polymer beads from the suspension, in which the aqueous monomer or monomer blend and/or the orifices is/are vibrated such that the frequency multiplied by the weight average droplet diameter is between 150 and 800 mm/s. 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. Furthermore, the invention also relates to polymer beads having a weight mean particle size in the range of 0.05 to 5 mm which are held in a container in an amount of at least 300 kg having a standard deviation of particle size less than 20 pcnt . In addition, the invention also provides polymer beads having a weight mean particle size in the range 0.05 to 5 mm having a standard deviation of particle size less than 20 pcnt and having an amount of residual acrylamide of less than 500 ppm.