Hydrazides of amino-polyacetic acids as chelants
US4609757A · kind A · utility
4Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1983 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Aug 10, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Amino-polyacetic acids such as ethylenediaminetetraacetic acid, diethylene triaminepentaacetic acid and nitrilotriacetic acid are reacted with alkanols and then with hydrazine to form the hydrazides which may be converted to carboxyhydrazides, i.e. carbazic acids. The products perform well as chelants and sequestering agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.