<p>The present invention relates to a method for preparing high-purity terephthalaldehyde from terephthalaldehyde crystal containing impurities by recrystallization using an antisolvent. Low-purity terephthalaldehyde prepared by a conventional method, which contains a small amount of impurities, is dissolved in a solvent and recrystallized using water as antisolvent to obtain high-purity terephthalaldehyde. The invention is significantly advantageous in using water only as antisolvent. Also, the purification process takes short time and is economical and environment-friendly.</p>
申请公布号
WO2006080769(A1)
申请公布日期
2006.08.03
申请号
WO2005KR03965
申请日期
2005.11.23
申请人
LG CHEM, LTD.;YOON, HYUN-KYUNG;LEE, WON-HO;CHAE, JONG-HYUN;LEE, DONG-IL