Dialkylamino-N,N-bis(phosphonoalkylene)alkylamines and use in aqueous systems as precipitation and corrosion inhibitors
US4234511A · kind A · utility
13Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1979 |
| Grant date | Nov 18, 1980 |
| Priority date | — |
| Expiry date | Jul 26, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/3817
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Dialkylamino-N,N-bis(phosphonoalkylene)alkylamines, salts, and specifically the hydrochlorides thereof prepared by reacting an unsymmetrical dimethylaminoalkylamine hydrochloride with phosphorous acid and an aldehyde are useful in various industrial processes including acting as corrosion and scale inhibitors in aqueous systems wherein such corrosion and scale problems exist. Quaternized dialkylamino-N,N-bis(phosphonoalkylene)alkylamines suitable for the same uses are prepared by the treatment of an aqueous solution of a dialkylamine-N,N-bis(phosphonoalkylene)alkylamine with an epoxide or a halohydrin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.