Non-alkaline purification of aminophosphonic acids
US5495042A · kind A · utility
27Cited by
9References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1993 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Nov 4, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/3817
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the purification of aminophosphonic acids under non-alkaline conditions is described. In particular, aminophosphonic acids are slurred in neutral or acidic water, heated to reflux, cooled and then filtered. Product purities approaching 100% are thus obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.