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    MAKING LOW-SODIUM RESIN
    3.
    发明公开
    MAKING LOW-SODIUM RESIN 审中-公开

    公开(公告)号：EP4249538A3

    公开(公告)日：2024-01-03

    申请号：EP23183850.9

    申请日：2018-10-08

    申请人： DDP Specialty Electronic Materials US, LLC ,  DDP Specialty Electronic Materials US 8, LLC

    发明人： ROHANNA, John C. ,  TEGEN, Marvin H. ,  SHULTZ, Alfred K.

    IPC分类号： C08F6/00 ,  C08F6/28

    摘要： Provided is method of treating a collection of resin beads (a) comprising the steps of
    (a) providing the collection of resin beads (a),
    wherein the resin beads (a) comprise one or more vinyl polymers having quaternary ammonium groups;
    wherein 90 mole % or more of the quaternary ammonium groups are each associated with a chloride anion;

    (b) bringing the collection of resin beads (a) into contact with an aqueous solution (b) comprising one or more dissolved (M) n X q to form a mixture (b),
    (c) separating water and compounds dissolved in the water from the mixture (b), to form resin beads (c) and waste solution (bw);
    (d) bringing resin beads (c) into contact with an aqueous solution (c) comprising dissolved (M3)(OH) p , to form a mixture (d).

    PROCESS FOR DEODORIZING POLYMERIC MATERIALS
    5.
    发明公开
    PROCESS FOR DEODORIZING POLYMERIC MATERIALS 审中-公开

    公开(公告)号：EP4180465A1

    公开(公告)日：2023-05-17

    申请号：EP22206572.4

    申请日：2022-11-10

    申请人： SERMAG S.r.l. ,  Italrec S.r.l.

    发明人： PASSERA, Gianluigi ,  BOLLATI, Nicola ,  ROSMINO, Andrea

    IPC分类号： C08F6/00 ,  C08F6/28

    摘要： The process comprises the steps of feeding a mixture of polymeric material and water, wherein the polymeric material constitutes from 75 to 95 wt.% and the water from 25 to 5 wt.% of the mixture, to a twin-screw extruder (14) having an L/D ratio between 1.25 and 1.50 and kept at a temperature between 180 and 260 °C; extruding from the twin-screw extruder (14) a melt consisting of 97 to 99 wt.% of polymeric material and 3 to 1 wt.% of water; feeding the melt to a single-screw extruder (16) having an L/D ratio between 20 and 32 and kept at a temperature between 180 and 260 °C, so as to obtain an extruded product; feeding the extruded product to a granulator (20) which produces granules of polymeric material containing no more than 0.3 wt.% of water; feeding the granules of polymeric material to the top of a silo (24) provided with a vertical axis feeding device (34), in countercurrent with a flow of air having a temperature between 80 and 90 °C and a flow rate between 4 and 13 m 3 /kg of granules of polymeric material; and obtaining deodorized granules of polymeric material.