公开(公告)号：US10881124B2

公开(公告)日：2021-01-05

申请号：US14965149

申请日：2015-12-10

申请人： Shin-Etsu Chemical Co., Ltd. ,  SE Tylose GmbH & Co. KG

发明人： Akira Kitamura ,  Atsushi Yamamoto ,  Mitsuo Narita ,  Heiko Nebel ,  Andreas Schultz

IPC分类号： C08B11/02 ,  A23L27/00 ,  C08L1/28 ,  A23D7/00 ,  C08B1/08

摘要： Provided is a method for producing an alkyl cellulose having a high viscosity and not having an excessively high gel strength. More specifically, there is provided a method for producing an alkyl cellulose comprising the steps of: mixing a cellulose pulp with a first alkali metal hydroxide solution with stirring to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a first reaction mixture; blending a second alkali metal hydroxide solution with the first reaction mixture with stirring, without further blending of the alkylating agent, to obtain a second reaction mixture; and purifying the second reaction mixture to obtain an alkyl cellulose. There is also provided an alkyl cellulose being produced by the above method and having a degree of substitution of alkyl group of 27 to 33% by weight.

公开(公告)号：US20160168271A1

公开(公告)日：2016-06-16

申请号：US14965149

申请日：2015-12-10

申请人： Shin-Etsu Chemical Co., Ltd. ,  SE Tylose GmbH & Co. KG

发明人： Akira Kitamura ,  Atsushi Yamamoto ,  Mitsuo Narita ,  Heiko Nebel ,  Andreas Schultz

IPC分类号： C08B11/02

CPC分类号： A23L27/80 ,  A23D7/003 ,  A23V2002/00 ,  C08B1/08 ,  C08B11/02 ,  C08L1/28

摘要： Provided is a method for producing an alkyl cellulose having a high viscosity and not having an excessively high gel strength. More specifically, there is provided a method for producing an alkyl cellulose comprising the steps of: mixing a cellulose pulp with a first alkali metal hydroxide solution with stirring to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a first reaction mixture; blending a second alkali metal hydroxide solution with the first reaction mixture with stirring, without further blending of the alkylating agent, to obtain a second reaction mixture; and purifying the second reaction mixture to obtain an alkyl cellulose. There is also provided an alkyl cellulose being produced by the above method and having a degree of substitution of alkyl group of 27 to 33% by weight.

摘要翻译： 提供一种具有高粘度且不具有过高凝胶强度的烷基纤维素的制备方法。 更具体地，提供了一种制备烷基纤维素的方法，包括以下步骤：在搅拌下将纤维素纸浆与第一碱金属氢氧化物溶液混合以获得碱纤维素; 使碱纤维素与烷基化剂反应得到第一反应混合物; 在搅拌下将第二碱​​金属氢氧化物与第一反应混合物混合，而不进一步共混烷基化剂，得到第二反应混合物; 并纯化第二反应混合物以获得烷基纤维素。 还提供了通过上述方法制备并具有27至33重量％的烷基取代度的烷基纤维素。