Water soluble corrosion inhibitors
US5322640A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/149
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention is a method for inhibiting corrosion in metallic flow lines containing hydrocarbon and/or aqueous fluids comprising adding to the fluid contained in the flow line a corrosion inhibiting amount of a water-soluble ampholytic substituted imidazoline having the formula: ##STR1## wherein R1 comprises a radical selected from the group consisting of hydrogen, alkyl, and aryl groups having 6 to 30 carbons; R2 comprises a radical selected from the group consisting of polyalkylene polyamines having from 2 to 16 carbon atoms, NH.sub.2, N(R.sub.4).sub.2, OH and SH; R.sub.3 is a radical selected from the group consisting of carboxylate, carbonate, sulfite, sulfate, phosphite, and phosphate; n is a number from 1 to 10; and, R4 comprises a branched or linear alkyl chain having a length of 1 to 8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.