Trim alkali metal desulfurization of refinery fractions
US10494577B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2017 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Feb 13, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Systems and methods are provided for upgrading aromatic refinery fractions by performing trim alkali metal desulfurization. The alkali metal desulfurization can be performed by mixing the aromatic refinery fraction with alkali metal in finely dispersed solid and/or molten form, such as molten sodium. The aromatic nature of the refinery fraction can potentially be beneficial for the desulfurization reaction mechanism. The aromatic refinery fractions can correspond to fractions that have been previously processed to remove metals. Because only trim desulfurization is being performed, the desulfurization can be performed under relatively mild alkali metal desulfurization conditions that result in a reduced or minimized amount of feed conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.