Corrosion inhibitor barrier for ferrous and non-ferrous metals
US6800594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2003 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Apr 19, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An environmentally friendly corrosion inhibiting formulation for the oil-water interface of pipe lines and oil well drilling systems which is prepared pursuant to a process including the steps of reacting an acid selected from the group consisting of a fatty acid anhydride and a 21 carbon dibasic acid with an amine or imidazoline to form a corrosion inhibitor consisting essentially of a fatty acid derivative; dissolving the inhibitor in a fatty acid oil or ester selected from the group consisting of soybean oil or methyl soya ester; adding water dispersing agents consisting of sulfonates and a long chain ethoxylated alcohol; and adjusting the viscosity with an alcohol comprising isopropanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.