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    METHOD FOR PURIFYING BRANCHED POLYETHYLENE GLYCOL
    71.
    发明申请
    METHOD FOR PURIFYING BRANCHED POLYETHYLENE GLYCOL 有权

    公开(公告)号：US20220363824A1

    公开(公告)日：2022-11-17

    申请号：US17788841

    申请日：2020-12-21

    申请人： NOF CORPORATION

    发明人： Midori HIRAI ,  Kyu TAKEUCHI

    IPC分类号： C08G65/30

    摘要： A method for purifying a branched polyethylene glycol, which includes adding, to a branched polyethylene glycol compound represented by the following formula [1] and having a weight average molecular weight of 40000 or more: where Z, Y1, Y2, A, Polymer, l, m and b are as defined herein, at least one solid acid selected from magnesium silicate, aluminum silicate, and aluminum magnesium silicate and having a specific surface area of 50 to 250 m2/g in the presence of an aprotic organic solvent to obtain a mixture; stirring the mixture; and subsequently separating the solid acid.

    PROCESS FOR PREPARING A COPOLYMER POLYOL
    72.
    发明申请
    PROCESS FOR PREPARING A COPOLYMER POLYOL 有权

    公开(公告)号：US20220089814A1

    公开(公告)日：2022-03-24

    申请号：US17424855

    申请日：2020-01-30

    申请人： Dow Global Technologies LLC

    发明人： Sven Claessens ,  Alexey Kirilin ,  Van Gaalen Gerrit-Jan ,  Balamurali Sreedhar ,  An Adams

    IPC分类号： C08G65/30 ,  B01J20/18 ,  B01J20/281 ,  B01D15/26 ,  B01D15/42

    摘要： A process for preparing a copolymer polyol containing a reduced content of residual monomers and volatiles including the steps of: (a) providing at least one copolymer polyol containing a first initial content of residual monomers and volatiles; (b) providing at least one molecular sieve adsorbent; (c) contacting the at least one copolymer polyol with the at least one molecular sieve adsorbent for a period of time and at a temperature sufficient for the at least one molecular sieve adsorbent to adsorb at least a portion of the first initial content of residual monomers and volatiles present in the at least one copolymer polyol to reduce the first initial content of residual monomers and volatiles of the at least one copolymer polyol to form at least one copolymer polyol containing a second reduced content of residual monomers and volatiles; and (d) separating the at least one molecular sieve adsorbent containing a portion of the first initial content residual monomers and volatiles from the at least one copolymer polyol to form at least one copolymer polyol containing a second reduced content of residual monomers and volatiles.

    Process for purification of crude polyether polyols
    75.
    发明授权
    Process for purification of crude polyether polyols 有权

    公开(公告)号：US10597490B2

    公开(公告)日：2020-03-24

    申请号：US15757392

    申请日：2016-09-02

    申请人： BASF SE

    发明人： Vincent Filip Janssens ,  Yassine Akhandaf

    IPC分类号： C08G65/30 ,  C08G65/26 ,  B01D29/00 ,  B01D29/82

    摘要： A process for the purification of a crude polyether polyol is provided, where the crude polyether polyol is prepared by anionic polymerization of alkylene oxides in the presence of basic catalysts. The process includes neutralizing of the catalysts with mineral acid to form a salt, addition an adsorption agent and/or filter aid and removing the salt and adsorption agent and/or filter aid by filtration to form a filter. In a subsequent step, the filter cake is pressed to recuperate the polyether polyol.