Phosphate esters of oxyalkylated beta-amino lower-alkyl carbamates as scale inhibitors
US4155869A · kind A · utility
3Cited by
4References
7Claims
0Family size
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Key dates
| Filing date | Sep 22, 1977 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Sep 22, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/14
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The precipitation of scale-forming salts is inhibited by adding to an aqueous solution partially neutralized phosphate esters of an ethoxylated or propoxylated urea. The compositions are particularly useful in oil wells, oil well brines, cooling or boiler water, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.