发明名称 |
METHOD FOR SEPARATING AND REFINING HIGH PURITY 2,6-NAPHTHALENE DICARBOXYLIC ACID USING CRYSTALLIZATION |
摘要 |
The present invention relates to a method for separating and refining high purity 2,6-naphthalene dicarboxylic acid having an excellent color and purity of 99.9% or more by using crude 2,6-naphthalene dicarboxylic acid. And more particularly, the present invention relates to a method for separating and refining 2,6-naphthalene dicarboxylic acid, in which adjustment of pressure and temperature during multiple-step crystallization process enables controlling nucleation and the crystal growth rate, thereby allowing a particle size distribution and form to be controlled. |
申请公布号 |
WO2009045016(A3) |
申请公布日期 |
2009.05.28 |
申请号 |
WO2008KR05661 |
申请日期 |
2008.09.24 |
申请人 |
HYOSUNG CORPORATION;CHEON, YANG HO;CHOI, YOUNG GYO |
发明人 |
CHEON, YANG HO;CHOI, YOUNG GYO |
分类号 |
C07C51/42 |
主分类号 |
C07C51/42 |
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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