Purification and production methods of 1-aminocyclopropanecarboxylic acid
US7476760B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Feb 12, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method purifies 1-aminocyclopropanecarboxylic acid by subjecting a crude 1-aminocyclopropanecarboxylic acid to crystallization with a solvent mixture containing an organic acid having one to five carbon atoms and a poor solvent for 1-aminocyclopropanecarboxylic acid, which poor solvent is miscible with the organic acid. In the method, the solvent mixture may further contain water. Purification may be carried out by mixing the crude 1-aminocyclopropanecarboxylic acid with the organic acid having one to five carbon atoms, removing insoluble matter by filtration, and adding the poor solvent with or without water to the filtrate to thereby crystallize 1-aminocyclopropanecarboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.