Method and apparatus for removing aromatic hydrocarbons from a gas stream prior to an amine-based gas sweetening process
US6183540A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L3/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is provided for the extraction of aromatic hydrocarbons, including benzene, toluene, ethylbenzene, and xylene, collectively known as "BTEX," in a continuous process utilizing a glycol contactor to cause absorption of the BTEX upstream of an amine-based gas sweetening process. The preferred glycol for BTEX absorption is triethylene glycol. The glycol used in the glycol contactor for BTEX extraction may either be fully regenerated (dry), or wet glycol from a downstream gas dehydration system. The method may be achieved with the use of a number of separate absorber/contactor vessels, or the method may be achieved within one combination vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.