Process for preventing corrosion and the formation of scale in water circulating system
US3933427A · kind A · utility
20Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1973 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | May 21, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/1676
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Preventing corrosion and scale formation in water re-circulating systems by adding to each cubic meter of the water being re-circulated from about 5 to 100 grams of a compound selected from the group consisting of those of the formula ##EQU1## and the water-soluble salts thereof R being hydrogen, alkyl, alkenyl or alkinyl having up to 4 carbon atoms; phenyl; cycloalkyl having 3 to 6 carbon atoms; benzyl; phenethyl or ##EQU2## wherein R' is hydrogen, alkyl having 1 to 4 carbon atoms or carboxyl, R" is hydrogen or methyl and R'" is carboxyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.