发明名称 |
Method for producing purified low-substituted hydroxypropyl cellulose |
摘要 |
<p>Provided is a method for producing low-substituted hydroxypropyl cellulose with less yellowing. More specifically, the method for producing purified low-substituted hydroxypropyl cellulose comprises 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.</p> |
申请公布号 |
EP2733154(A1) |
申请公布日期 |
2014.05.21 |
申请号 |
EP20130192381 |
申请日期 |
2013.11.11 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
KITAMURA, AKIRA;YONEMOCHI, ATSUHIKO;NARITA, MITSUO |
分类号 |
C08B11/08 |
主分类号 |
C08B11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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