| US 7,476,760 B2 | ||
| Purification and production methods of 1-aminocyclopropanecarboxylic acid | ||
| Ryota Hamasaki, Tsukuba (Japan); and Mitsuru Ohno, Tsukuba (Japan) | ||
| Assigned to Daicel Chemical Industries, Ltd., Sakai (Japan) | ||
| Filed on Jul. 19, 2005, as Appl. No. 11/183,858. | ||
| Claims priority of application No. 2004-229872 (JP), filed on Aug. 05, 2004. | ||
| Prior Publication US 2006/0030730 A1, Feb. 09, 2006 | ||
| Int. Cl. C07C 62/00 (2006.01) | ||
| U.S. Cl. 562—506 | 5 Claims |
| 1. A method for purifying 1-aminocyclopropanecarboxylic acid, comprising the step of subjecting a crude 1-aminocyclopropanecarboxylic acid to crystallization with a solvent mixture comprising a carboxylic acid and a poor solvent for 1-aminocyclopropanecarboxylic acid, the carboxylic acid having one to five carbon atoms, and the poor solvent being miscible with the organic acid. |