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发明申请
WO01014307A1 COLUMNAR CRYSTALS OF 6-HYDROXY-2-NAPHTHOIC ACID AND PROCESS FOR THE PRODUCTION THEREOF 审中-公开
6-羟基-2-萘甲酸的柱状晶体及其生产方法

  • 专利标题： COLUMNAR CRYSTALS OF 6-HYDROXY-2-NAPHTHOIC ACID AND PROCESS FOR THE PRODUCTION THEREOF
  • 专利标题（英）： Columnar crystals of 6-hydroxy-2-naphthoic acid and process for the production thereof
  • 专利标题（中）： 6-羟基-2-萘甲酸的柱状晶体及其生产方法
  • 申请号： PCT/JP2000/005535
    申请日： 2000-08-18
  • 公开(公告)号： WO01014307A1
    公开(公告)日： 2001-03-01
  • 主分类号： C07C51/43
  • IPC分类号： C07C51/43 ;  C07C65/11
COLUMNAR CRYSTALS OF 6-HYDROXY-2-NAPHTHOIC ACID AND PROCESS FOR THE PRODUCTION THEREOF
摘要：
A process for the production of columnar crystals of 6-hydroxy-2-naphthoic acid, which comprises dissolving crude 6-hydroxy-2-naphthoic acid in an aqueous medium, adding seed crystals of 3-hydroxy-2,7-naphthoic acid or seed columnar crystals to the solution, and cooling the resulting mixture to conduct crystallization; and columnar crystals of 6-hydroxy-2-naphthoic acid produced by the process, which exhibit in the X-ray diffraction a peak 2 DOLLAR g (u) ranging from 16.8 to 17.8 and/or from 21.3 to 22.3 and have a high apparent specific gravity and excellent fluidity.
摘要（中）：

制备6-羟基-2-萘甲酸的柱状结晶的方法，其包括将6-羟基-2-萘甲酸溶于水性介质中，加入3-羟基-2,7-萘甲酸的晶种或 将晶体柱状晶体加入到溶液中，并冷却所得混合物进行结晶; 和通过该方法产生的6-羟基-2-萘甲酸的柱状晶体，其在X射线衍射中显示峰值2 DOLLAR g（u）为16.8至17.8和/或21.3至22.3，具有高的表观 比重和流动性好。

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