Extractive distillation process for recovering aromatics from petroleum streams
US7666299B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 10, 2007 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | May 9, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G7/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for recovering polar hydrocarbons from non-polar hydrocarbons, such as aromatics from non-aromatics, naphthenes from paraffins and isoparaffins, or olefins from paraffins and isoparaffins, in feed mixtures containing at least a measurable amount of heavier hydrocarbons. This improved extractive distillation (ED) process recovers aromatic hydrocarbons including benzene, toluene, and xylenes from the C6-C8 petroleum streams containing a measurable amount of C9+ hydrocarbons. The ED process also recovers benzene and toluene from the C6-C7 petroleum streams containing a measurable amount of C8+ hydrocarbons. The ED solvent utilized to recover and purify the aromatic hydrocarbons from the petroleum stream with a heavier than intended feedstock of hydrocarbons is also regenerated and recovered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.