Process for dehydrating and degassing a gas, comprising two complementary solvent regeneration steps
US5868005A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Sep 23, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G5/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for treating a gas containing methane, at least one higher hydrocarbon and water to eliminate the water and extract the higher hydrocarbon(s) comprises: PA1 a) separating the gas to be treated into two streams (1) and (2); PA1 b) bringing at least stream (2) into contact with a recycled liquid phase comprising water and a solvent, to obtain an aqueous liquid phase which is depleted in solvent and a gas phase which is charged with solvent; PA1 c) separating the aqueous phase which is depleted in solvent and the gas phase which is charged with solvent; PA1 d) bringing said aqueous phase which is depleted in solvent into contact with one of the solvent-free gas streams defined at (a), the solvent being extracted from the depleted aqueous phase by the gas, and recovering a gas phase which is rich in solvent and a regenerated aqueous liquid phase; PA1 e) mixing the gas phase with either the gas phase from step (b) or the stream (2) upstream of contact step (b); PA1 f) cooling the gas phase from the mixing step so as to partially condense it into an aqueous phase containing solvent and a hydrocarbon phase and to produce the treated gas, free of at least part of the water and th…
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