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公开(公告)号：US11634510B2
公开(公告)日：2023-04-25
申请号：US15930079
申请日：2020-05-12
发明人： Akira Kitamura , Mitsuhiro Yoshida , Mitsuo Narita
IPC分类号： C08B11/20
摘要： There are provided a method for efficiently producing a water-soluble cellulose ether without using a special apparatus, and a novel water-soluble cellulose ether. More specifically, there are provided a method for producing a water-soluble cellulose ether including a first pulverization step of pulverizing a starting water-soluble cellulose ether to obtain a first pulverization product, and a first sieving step of sieving the first pulverization product by using a first sieve whose mesh surface is coated with an inorganic metal compound to obtain a first-sieve-passed water-soluble cellulose ether fraction; and a novel water-soluble cellulose ether.
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公开(公告)号：US20220127380A1
公开(公告)日：2022-04-28
申请号：US17505926
申请日：2021-10-20
IPC分类号： C08B11/20
摘要： There is provided a method for producing a depolymerized cellulose ether having yellowness reduced. More specifically, there is provided a method for producing a depolymerized cellulose ether comprising a depolymerization step of depolymerizing a cellulose ether with an aqueous solution of acid in the presence of a polyhydric alcohol having 2 to 6 carbon atoms.
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公开(公告)号：US10767023B2
公开(公告)日：2020-09-08
申请号：US15333616
申请日：2016-10-25
发明人： Mitsuo Narita
摘要： There are provided a porous water-soluble nonionic cellulose ether having an average pore size of 36 μm or smaller and an average particle size of from 30 to 300 μm; and a method for continuously producing said cellulose ether comprising the steps of: pulverizing a first water-soluble nonionic cellulose ether to obtain a first pulverized product, and sieving the pulverized product through a sieve having an opening of from 40 to 400 μm to obtain a first residue-on-sieve and a first sieve-passing fraction, wherein a portion or all of the first residue-on-sieve containing particles having particle sizes smaller than and greater than the opening of the sieve is re-pulverized together with a second water-soluble nonionic cellulose ether in the step of pulverizing to obtain a second pulverized product, which is pulverized to obtain the cellulose ether as a second sieve-passing fraction containing the re-pulverized particles.
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公开(公告)号：US20200031954A1
公开(公告)日：2020-01-30
申请号：US16521253
申请日：2019-07-24
IPC分类号： C08B3/16
摘要： There is provided a method for producing hypromellose acetate succinate (HPMCAS), the method not requiring any special device and facilitating removal of impurities. More specifically, there is provided a method for producing HPMCAS, including an esterification step of esterifying hypromellose with an acetylating agent and a succinoylating agent in the presence of an aliphatic carboxylic acid to obtain a reaction product solution containing HPMCAS; a precipitation step of precipitating the HPMCAS by mixing the reaction product solution with water to obtain a suspension of the precipitated HPMCAS; a neutralization step of neutralizing the suspension with a basic substance to obtain a neutralized suspension; and a washing step of washing the HPMCAS contained in the neutralized suspension to obtain the washed HPMCAS.
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5.发明授权Method for producing water-soluble nonionic cellulose ether excellent in storage stability 有权用于生产储存稳定性优异的水溶性非离子纤维素醚的方法公开(公告)号：US09487594B2
公开(公告)日：2016-11-08
申请号：US14305174
申请日：2014-06-16
发明人： Mitsuo Narita
IPC分类号： C08B11/08 , C08B11/00 , C08B11/20 , C08B11/193
CPC分类号： C08B11/20 , C08B11/00 , C08B11/08 , C08B11/193
摘要： Provided is a water-soluble nonionic cellulose ether excellent in storage stability. More specifically, provided is a method for producing a water-soluble nonionic cellulose ether including an etherification step of reacting an alkali cellulose with an etherifying agent to obtain a crude cellulose ether, a washing step of washing the crude cellulose ether to obtain a washed cellulose ether, a drying step of drying the washed cellulose ether, and a grinding step of grinding the cellulose ether during or after the drying, wherein during the washing step or in any of the steps after the washing step, a pH regulator is mixed so as to allow an aqueous 2% by weight solution of the cellulose ether as an end product to have a pH value of from 7.0 to 10.5.
摘要翻译： 提供了保存稳定性优异的水溶性非离子性纤维素醚。 更具体地，提供一种水溶性非离子纤维素醚的制造方法，其包括使碱性纤维素与醚化剂反应得到粗纤维素醚的醚化工序，洗涤粗纤维素醚以洗涤纤维素 乙醚，干燥洗涤的纤维素醚的干燥步骤，以及在干燥过程中或之后研磨纤维素醚的研磨步骤，其中在洗涤步骤或洗涤步骤之后的任何步骤中，将pH调节剂混合成 以使2重量％的纤维素醚水溶液作为最终产物的pH值为7.0至10.5。
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6.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。
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公开(公告)号：US11319385B2
公开(公告)日：2022-05-03
申请号：US16521253
申请日：2019-07-24
IPC分类号： C08B3/16
摘要： There is provided a method for producing hypromellose acetate succinate (HPMCAS), the method not requiring any special device and facilitating removal of impurities. More specifically, there is provided a method for producing HPMCAS, including an esterification step of esterifying hypromellose with an acetylating agent and a succinoylating agent in the presence of an aliphatic carboxylic acid to obtain a reaction product solution containing HPMCAS; a precipitation step of precipitating the HPMCAS by mixing the reaction product solution with water to obtain a suspension of the precipitated HPMCAS; a neutralization step of neutralizing the suspension with a basic substance to obtain a neutralized suspension; and a washing step of washing the HPMCAS contained in the neutralized suspension to obtain the washed HPMCAS.
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公开(公告)号：US20220127379A1
公开(公告)日：2022-04-28
申请号：US17505920
申请日：2021-10-20
发明人： Kentaro Miki , Akira Kitamura , Mitsuo Narita
IPC分类号： C08B11/20
摘要： There is provided a method for producing a depolymerized cellulose ether, the method suppressing the formation of coarse aggregates during the contact with an acid aqueous solution in a depolymerization reaction, and reducing the amounts of aggregates and black contaminants, while suppressing yellowness. More specifically, there is provided a method for producing a depolymerized cellulose ether, the method including a depolymerization step of depolymerizing a cellulose ether by bring the cellulose ether of 45 to 95° C. into contact with an acid aqueous solution of 55 to 98° C. to obtain a depolymerized cellulose ether.
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公开(公告)号：US10570217B2
公开(公告)日：2020-02-25
申请号：US15452894
申请日：2017-03-08
IPC分类号： C08B11/00 , C08B11/193 , C08B1/08 , C08B11/08 , C08L1/28 , A23L29/262 , A23L33/10 , A23L29/288
摘要： Hydroxypropyl methyl cellulose having a high thermal gel strength even at a low viscosity is provided and utilized. Specifically provided is hydroxypropyl methyl cellulose having such properties that a 2% by weight aqueous solution of the hydroxypropyl methyl cellulose has a viscosity at 20° C. of 300 to 2,000 mPa·s and a storage elastic modulus at 85° C. of 2,000 to 4,500 mPa. Also provided is a food comprising the hydroxypropyl methyl cellulose. Further provided is a method for producing the hydroxypropyl methyl cellulose, the method comprising a step of depolymerizing, with an acid, high-viscosity hydroxypropyl methyl cellulose having such a property that a 2% by weight aqueous solution of the high-viscosity hydroxypropyl methyl cellulose has a viscosity at 20° C. of 70,000 to 100,000 mPa·s to obtain the hydroxypropyl methyl cellulose.
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公开(公告)号：US20200031953A1
公开(公告)日：2020-01-30
申请号：US16521237
申请日：2019-07-24
IPC分类号： C08B3/10
摘要： There is provided a method for producing hypromellose phthalate (HPMCP), the method not requiring any special device, and facilitating removal of impurities. More specifically, there is provided a method for producing HPMCP, including an esterification step of esterifying hypromellose with a carboxybenzoylating agent in the presence of an aliphatic carboxylic acid to obtain a reaction product solution containing HPMCP; a precipitation step of precipitating the HPMCP by mixing the reaction product solution with water to obtain a suspension of the precipitated HPMCP; a neutralization step of neutralizing the suspension with a basic substance to obtain a neutralized suspension; and a washing step of washing the HPMCP contained in the neutralized suspension to obtain the washed HPMCP.
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