-
1.发明授权Method for dehydrating hydrous low-substituted hydroxypropyl cellulose and method for producing low-substituted hydroxypropyl cellulose by using same 有权脱水含水低取代羟丙基纤维素的方法和使用它的低取代羟丙基纤维素的制造方法公开(公告)号：US09428590B2
公开(公告)日：2016-08-30
申请号：US14454964
申请日：2014-08-08
摘要： Reduction of the energy burden in a step of drying hydrous low-substituted hydroxypropyl cellulose (L-HPC), reduction of water content of a cake obtained by dehydration, and others are targeted. More specifically, provided is a method for dehydrating hydrous L-HPC with a compression type dehydrator by feeding the hydrous L-HPC to a screw conveyer connected to the inlet of the dehydrator, including steps of: starting the operation of the conveyer to fill the conveyer and the dehydrator with the hydrous L-HPC, starting the operation of the filled dehydrator, and feeding the hydrous L-HPC to the conveyer, while discharging dehydrated L-HPC from an outlet of the dehydrator, wherein a feed rate of feeding the hydrous L-HPC to the conveyer is equal to a discharge rate of discharging the dehydrated L-HPC in terms of net weight of cellulose ether, and a method for producing L-HPC by using the above method.
摘要翻译： 干燥含水低取代羟丙基纤维素（L-HPC）的步骤中的能量负荷的降低，脱水得到的滤饼的水分含量的降低等。 更具体地，提供了一种通过将水合L-HPC进料到连接到脱水机的入口的螺旋输送机上的压缩型脱水机来脱水含水L-HPC的方法，包括以下步骤：开始输送机的操作以填充 输送机和脱水器与水合L-HPC开始，开始填充脱水器的操作，并且将水合L-HPC输送到输送机，同时从脱水器的出口排放脱水的L-HPC，其中进料速率 对于输送机的含水L-HPC等于脱水的L-HPC以纤维素醚的净重排出的排出量，以及使用上述方法生产L-HPC的方法。
-
公开(公告)号：US10508155B2
公开(公告)日：2019-12-17
申请号：US14858575
申请日：2015-09-18
摘要： Provided is a method for efficiently and continuously producing a cellulose ether containing a reduced amount of indissoluble component. Specifically, the method includes a contact step of bringing pulp into contact with an alkali metal hydroxide solution in the presence of a heat removal solvent to obtain alkali cellulose; a reaction step of subjecting the alkali cellulose to a reaction with an etherifying agent; a partial condensation step, after completion of the reaction, of partially condensing a gas present in a reaction vessel used for the reaction to separate the gas into gas and liquid components for returning some or all of the gas component to the contact step for reuse as some or all of the heat removal solvent; and a step of incinerating the liquid component and, when all of the gas component is not returned to the contact step, the remainder of the gas component.
-
3.发明申请公开(公告)号：US20140142293A1
公开(公告)日：2014-05-22
申请号：US14079704
申请日：2013-11-14
IPC分类号： C08B11/02
摘要： Provided is a method for producing low-substituted hydroxypropyl cellulose with less yellowing. More specifically, the method for producing purified low-substituted hydroxypropyl cellulose includes the steps of: reacting alkali cellulose and an etherifying agent to obtain a reaction mixture; dispersing the reaction mixture in water containing a portion of acetic acid necessary for neutralizing the total amount of the reaction mixture to neutralize a portion of the reaction mixture, and then completely neutralizing with the remaining acetic acid to cause precipitation, to obtain a slurry containing crude low-substituted hydroxypropyl cellulose; disintegrating a solid component in the slurry through a cutter pump, the solid component containing the crude low-substituted hydroxypropyl cellulose, and discharging the slurry containing the disintegrated solid component; washing the discharged slurry with water to obtain a cake of purified low-substituted hydroxypropyl cellulose; and drying the cake.
摘要翻译： 本发明提供一种低发黄的低取代羟丙基纤维素的制造方法。 更具体地，纯化的低取代羟丙基纤维素的制造方法包括以下步骤：使碱纤维素和醚化剂反应得到反应混合物; 将反应混合物分散在含有一部分乙酸所需的中和反应混合物的总量以中和一部分反应混合物的水中，然后用剩余的乙酸完全中和以引起沉淀，得到含有粗品 低取代羟丙基纤维素; 通过切割泵将浆料中的固体组分分解，固体组分含有粗低取代羟丙基纤维素，并排出含有崩解的固体组分的浆料; 用水洗涤排出的浆料，得到纯化的低取代羟丙基纤维素的滤饼; 并干燥蛋糕。
-
公开(公告)号：US10174128B2
公开(公告)日：2019-01-08
申请号：US14079704
申请日：2013-11-14
摘要： Provided is a method for producing low-substituted hydroxypropyl cellulose with less yellowing. More specifically, the method for producing purified low-substituted hydroxypropyl cellulose includes the steps of: reacting alkali cellulose and an etherifying agent to obtain a reaction mixture; dispersing the reaction mixture in water containing a portion of acetic acid necessary for neutralizing the total amount of the reaction mixture to neutralize a portion of the reaction mixture, and then completely neutralizing with the remaining acetic acid to cause precipitation, to obtain a slurry containing crude low-substituted hydroxypropyl cellulose; disintegrating a solid component in the slurry through a cutter pump, the solid component containing the crude low-substituted hydroxypropyl cellulose, and discharging the slurry containing the disintegrated solid component; washing the discharged slurry with water to obtain a cake of purified low-substituted hydroxypropyl cellulose; and drying the cake.
-
5.发明申请公开(公告)号：US20150045550A1
公开(公告)日：2015-02-12
申请号：US14454964
申请日：2014-08-08
IPC分类号： C08B11/20
摘要： Reduction of the energy burden in a step of drying hydrous low-substituted hydroxypropyl cellulose (L-HPC), reduction of water content of a cake obtained by dehydration, and others are targeted. More specifically, provided is a method for dehydrating hydrous L-HPC with a compression type dehydrator by feeding the hydrous L-HPC to a screw conveyer connected to the inlet of the dehydrator, including steps of: starting the operation of the conveyer to fill the conveyer and the dehydrator with the hydrous L-HPC, starting the operation of the filled dehydrator, and feeding the hydrous L-HPC to the conveyer, while discharging dehydrated L-HPC from an outlet of the dehydrator, wherein a feed rate of feeding the hydrous L-HPC to the conveyer is equal to a discharge rate of discharging the dehydrated L-HPC in terms of net weight of cellulose ether, and a method for producing L-HPC by using the above method.
摘要翻译： 干燥含水低取代羟丙基纤维素（L-HPC）的步骤中的能量负荷的降低，脱水得到的滤饼的水分含量的降低等。 更具体地，提供了一种通过将水合L-HPC进料到连接到脱水机的入口的螺旋输送机上的压缩型脱水机来脱水含水L-HPC的方法，包括以下步骤：开始输送机的操作以填充 输送机和脱水器与水合L-HPC开始，开始填充脱水器的操作，并且将水合L-HPC输送到输送机，同时从脱水器的出口排放脱水的L-HPC，其中进料速率 对于输送机的含水L-HPC等于脱水的L-HPC以纤维素醚的净重排出的排出量，以及使用上述方法生产L-HPC的方法。
-
-
-
-
搜索结果
5 条记录 (耗时 0.014 秒)
