Flourinated aromatic compound as refinery corrosion inhibitor
US11434413B1 · kind B1 · utility
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3Claims
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Key dates
| Filing date | May 7, 2021 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | May 7, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/32
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Corrosion inhibitor compositions and methods for inhibiting corrosion on a metal surface exposed to a hydrocarbon fluid are provided. The corrosion inhibition composition can comprise tetrafluoroterephthalic acid, dimethyl sulfoxide, and heavy aromatic naphtha. The corrosion inhibitor composition can be phosphate-free and can inhibit naphthenic acid corrosion. In the methods, the corrosion inhibitor composition is added to the hydrocarbon fluid exposed to the metal surface to prevent or inhibit corrosion on the metal surface, including naphthenic acid corrosion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.