Sulfur reduction methods and systems
US11535802B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Aug 18, 2021 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Aug 18, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/202
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods and systems for reducing sulfur content in crude oil are provided. The methods and systems apply a first alkaline aqueous solution to crude oil to produce alkaline-treated crude oil, apply an acid aqueous solution to the alkaline-treated crude oil to produce acid-treated crude oil, apply a second alkaline aqueous solution to the acid-treated crude oil to produce neutralized crude oil; and separate residual water that contains sulfur from the neutralized crude oil to produce treated crude oil that has less sulfur content than the crude oil before the treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.