发明名称 |
Method For Dehydrating Hydrous Low-Substituted Hydroxypropyl Cellulose and Method for Producing Low-Substituted Hydroxypropyl Cellulose By Using Same |
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. |
申请公布号 |
US2015045550(A1) |
申请公布日期 |
2015.02.12 |
申请号 |
US201414454964 |
申请日期 |
2014.08.08 |
申请人 |
Shin-Etsu Chemical Co., Ltd. |
发明人 |
Matsubara Junichi;Yonemochi Atsuhiko;Narita Mitsuo |
分类号 |
C08B11/20 |
主分类号 |
C08B11/20 |
代理机构 |
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代理人 |
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主权项 |
1. A method for dehydrating hydrous low-substituted hydroxypropyl cellulose with a compression type dehydrator by feeding the hydrous low-substituted hydroxypropyl cellulose to a screw conveyer connected to an inlet of the compression type dehydrator, comprising the steps of:
starting operation of the screw conveyor to fill the screw conveyer and the compression type dehydrator with the hydrous low-substituted hydroxypropyl cellulose to obtain a filled compression type dehydrator, starting operation of the filled compression type dehydrator, and feeding the hydrous low-substituted hydroxypropyl cellulose to the screw conveyer, while discharging dehydrated low-substituted hydroxypropyl cellulose from an outlet of the compression type dehydrator, wherein a feed rate of feeding the hydrous low-substituted hydroxypropyl cellulose to the screw conveyer is equal to a discharge rate of discharging the dehydrated low-substituted hydroxypropyl cellulose in terms of net weight of cellulose ether. |
地址 |
Tokyo JP |