发明名称 |
PURIFICATION METHOD OF HYDROXYPROPYLMETHYL CELLULOSE PHTHALATE |
摘要 |
The present invention relates to a purification method of hydroxypropylmethyl cellulose phthalate, more particularly to a method of preparing high-purity hydroxypropylmethyl cellulose phthalate through a simple crushing process which comprises: increasing fluidity of reaction product mixture by adding fluidization solvent as a post-treatment process; and spraying it into water through a spray nozzle. As a result, formation of fine granular hydroxypropylmethyl cellulose phthalate particles prevents inter-particle coagulation during the a post-treatment process, and phthalic anhydride reactant, free phthalic acid and remaining acetic acid solvent can be removed effectively. |
申请公布号 |
WO02085949(A1) |
申请公布日期 |
2002.10.31 |
申请号 |
WO2002KR00580 |
申请日期 |
2002.04.02 |
申请人 |
SAMSUNG FINE CHEMICALS CO., LTD.;CHO, KYU-IL;BAEK, HYON-HO |
发明人 |
CHO, KYU-IL;BAEK, HYON-HO |
分类号 |
A61K9/28;C08B11/20;C08B13/00 |
主分类号 |
A61K9/28 |
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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