Method and apparatus for separating and refining high purity 2,6-naphthalene dicarboxylic acid using crystallization
申请人:Cheon Yang-Ho
公开号:US20100256415A1
公开(公告)日:2010-10-07
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.
本发明涉及一种利用粗2,6-萘二甲酸分离和提纯高纯度2,6-萘二甲酸的方法,其具有优异的颜色和纯度,可达99.9%或更高。特别地,本发明涉及一种分离和提纯2,6-萘二甲酸的方法,在多步结晶过程中通过调节压力和温度,控制成核和晶体生长速率,从而实现粒径分布和形态的控制。