专利检索 ap:("Tohru Miura" OR "Katsuju Watanabe" OR "Hitoshi Nakayama" OR "Masayuki Furuya" OR "Teruyuki Nagata") AND inv:"Katsuju Watanabe" 第 1 页

1.

发明授权
Method of purifying 2,4-xylenol 失效
标题翻译：纯化2,4-二甲苯酚的方法

公开(公告)号：US4851590A

公开(公告)日：1989-07-25

申请号：US199750

申请日：1988-05-27

申请人： Tohru Miura , Katsuju Watanabe , Hitoshi Nakayama , Masayuki Furuya , Teruyuki Nagata

发明人： Tohru Miura , Katsuju Watanabe , Hitoshi Nakayama , Masayuki Furuya , Teruyuki Nagata

IPC分类号： C07C37/86

CPC分类号： C07C37/86

摘要： 2,4-Xylenol can be obtained in high yield and high purity from a crude 2,4-xylenol isomer mixture containing 2,5-xylenol by selectively reacting the 2,5-xylenol with an aldehyde in the presence of an aromatic sulfonic acid, thereby converting the 2,5-xylenol into a xylenol-aldehyde condensate and, subsequently, separating the 2,4-xylenol, e.g., by distillation.