Aminopolycarboxylic acid aqueous solution composition and stabilization method of aminopolycarboxlic acid
US7319165B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Jun 11, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C229/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is to provide a stabilized aqueous aminopolycarboxylate solution composition and a method of stabilizing the aminopolycarboxylate through preventing the same from caking.An aqueous aminopolycarboxylate solution composition containing an aminopolycarboxylate represented by the following general formula (1):in the formula, X may be the same or different and represents a hydrogen atom, an alkali metal atom, or an ammonium group, which has a D-form/L-form molar ratio of an aspartic acid skeleton of the aminopolycarboxylate of 1/0 to 0.7/0.3 or 0.3/0.7 to 0/1, has a solid concentration of 25 to 60 mass %, and has a pH value of not more than 11.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.