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    HYPROMELLOSE ACETATE SUCCINATE AND METHOD FOR PRODUCING HYPROMELLOSE ACETATE SUCCINATE
    2.
    发明公开
    HYPROMELLOSE ACETATE SUCCINATE AND METHOD FOR PRODUCING HYPROMELLOSE ACETATE SUCCINATE 审中-公开
    醋酸胞外酯琥珀酸酯和生产醋酸胞内酯琥珀酸酯的方法

    公开(公告)号：EP3290444A1

    公开(公告)日：2018-03-07

    申请号：EP17187808.5

    申请日：2017-08-24

    申请人： Shin-Etsu Chemical Co., Ltd.

    发明人： Yoshida, Mitsuhiro ,  Matsubara, Junichi ,  Kikuchi, Kazuki

    IPC分类号： C08B13/00

    CPC分类号： C08B3/06 ,  A61K47/38 ,  B04B1/20 ,  C08B13/00

    摘要： Provided is a method for producing HPMCAS capable of reducing the average particle size of HPMCAS particles to an intended range without a pulverization step. Specifically provided is a method for producing hypromellose acetate succinate, comprising an esterification step of reacting hypromellose with an esterification agent in the presence of a catalyst to obtain a reaction solution containing crude hypromellose acetate succinate, a precipitation step of mixing the reaction solution with water to precipitate the crude hypromellose acetate succinate, thereby obtaining a hypromellose acetate succinate suspension, a liquid removal step of removing a liquid from the hypromellose acetate succinate suspension with a centrifugal decanter to obtain liquid-removed hypromellose acetate succinate, and a drying step of drying the liquid-removed hypromellose acetate succinate.

    摘要翻译： 本发明提供一种HPMCAS的制造方法，其能够在不进行粉碎工序的情况下将HPMCAS粒子的平均粒径缩小至目标范围。 具体而言，提供一种乙酸琥珀酸羟丙甲纤维素酯的制造方法，其包括使羟丙甲纤维素与酯化剂在催化剂存在下反应的酯化工序，得到含有醋酸琥珀酸羟丙甲纤维素酯的反应溶液，将反应溶液与水混合 从而得到琥珀酸羟丙甲纤维素琥珀酸酯，从而得到琥珀酸羟丙甲纤维素琥珀酸酯悬浮液;用离心滗析器从乙酸羟丙甲纤维素琥珀酸酯悬浮液中除去液体以获得液体除去的乙酸琥珀酸羟丙甲纤维素酯的液体除去步骤;以及干燥步骤， 去除醋酸羟丙甲纤维素琥珀酸酯。

    METHOD FOR PRODUCING CELLULOSE ETHER
    3.
    发明公开
    METHOD FOR PRODUCING CELLULOSE ETHER 审中-公开
    VERFAHREN ZUR HERSTELLUNG VON CELLULOSEETHER

    公开(公告)号：EP2937363A1

    公开(公告)日：2015-10-28

    申请号：EP15163261.9

    申请日：2015-04-10

    申请人： SHIN-ETSU CHEMICAL CO., LTD

    发明人： Yoshida, Mitsuhiro

    IPC分类号： C08B11/20 ,  C08B17/06 ,  C08B11/193 ,  C09J101/28

    CPC分类号： C08B11/20 ,  C08B1/08 ,  C08B11/00 ,  C08B11/08 ,  C09J101/284

    摘要： Provided is a method for producing a cellulose ether comprising a drying step capable of continuously and stably drying a highly adhesive wet cellulose ether with high thermal efficiency without causing adhesive growth and solidification of the wet cellulose ether in a dryer. More specifically, the method for producing a cellulose ether comprising a step of drying a wet cellulose ether having water content of more than 50% by weight in a rotary type through-flow dryer.

    摘要翻译： 本发明提供一种纤维素醚的制造方法，其特征在于，具有干燥工序，能够连续稳定地干燥具有高热效率的高粘合性湿纤维素醚，而不会在干燥机中引起湿纤维素醚的粘附生长和固化。 更具体地说，涉及一种纤维素醚的制造方法，其特征在于，在旋转型通流式干燥机中，干燥含有50重量％以上的水分的湿纤维素醚的工序。