Integrated desulfurization and denitrification process including mild hydrotreating of aromatic-lean fraction and oxidation of aromatic-rich fraction
US8741128B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2010 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Dec 15, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/44
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Deep desulfurization of hydrocarbon feeds containing undesired organosulfur and organonitrogen compounds to produce a hydrocarbon product having low levels of sulfur-containing and nitrogen-containing compounds, is achieved by first subjecting the entire feed to an extraction zone to separate an aromatic-rich fraction containing a substantial amount of the refractory organosulfur and organonitrogen compounds and an aromatic-lean fraction containing a substantial amount of the labile organosulfur and organonitrogen compounds. The aromatic-lean fraction is contacted with a hydrotreating catalyst in a hydrotreating reaction zone operating under mild conditions to convert the labile organosulfur and organonitrogen compounds. The aromatic-rich fraction is oxidized to convert the refractory organosulfur and organonitrogen compounds to oxidized organosulfur and organonitrogen compounds. These oxidized organosulfur and organonitrogen compounds are subsequently removed, producing a stream containing reduced levels of organosulfur and organonitrogen compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.