Enhanced solvent deasphalting process for heavy hydrocarbon feedstocks utilizing solid adsorbent
US7566394B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Dec 20, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G25/05
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A solvent deasphalting of crude oil or petroleum heavy fractions and residues is carried out in the presence of a solid adsorbent, such as clay, silica, alumina and activated carbon, which adsorbs the contaminants and permits the solvent and oil fraction to be removed as a separate stream from which the solvent is recovered for recycling; the adsorbent with contaminants and the asphalt bottoms is mixed with aromatic and/or polar solvents to desorb the contaminants and washed as necessary, e.g., with benzene, toluene, xylenes and tetrahydrofuran, to clean adsorbant which is recovered and recycled; the solvent-asphalt mixture is sent to a fractionator for recovery and recycling of the aromatic or polar solvent. The bottoms from the fractionator include the concentrated PNA and contaminants and are further processes as appropriate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.