Drying process for gases making use of glycol including the separation of gaseous effluents

A process for dehydrating natural gas or refinery gas, contg. methane and other light alkanes, BTEX (benzene, toluene, ethyl benzene and xylene), water and opt. CO2, N2 and/or H2S, using a liq. desiccant, comprises: (a) absorbing water and BTEX by contact with regenerated liq. desiccant (from step (...

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Bibliographic Details
Main Authors LANDREAU, BENOIT, AMANDE, JEAN-CLAUDE, DOERLER, NICOLE, ROJEY, ALEXANDRE
Format Patent
LanguageEnglish
French
German
Published 23.08.2000
Edition7
Subjects
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Summary:A process for dehydrating natural gas or refinery gas, contg. methane and other light alkanes, BTEX (benzene, toluene, ethyl benzene and xylene), water and opt. CO2, N2 and/or H2S, using a liq. desiccant, comprises: (a) absorbing water and BTEX by contact with regenerated liq. desiccant (from step (c)) to produce a dry gas stream and a loaded liq. desiccant stream; (b) separating the loaded liq. desiccant into a vapour phase, mainly contg. methane, steam and part of the BTEX, and a liq. phase mainly contg. the desiccant loaded with water and BTEX; (c) regenerating the liq. desiccant in reboiling and distillation zones, in which the distillation zone produces a vapour phase, contg. steam and BTEX, and the regenerated liq. desiccant returning to step (a); (d) condensing the vapour phase from the distillation zone, and separating the three phases, i.e. a BTEX-contg. gas stream, a BTEX-contg. liq. hydrocarbon phase and a liq. aq. phase; and (e) treating at least the BTEX-contg. gas stream in a scrubbing zone by absorbing the BTEX in a withdrawn regenerated liq. desiccant fraction and passing the BTEX-loaded desiccant to a point in the regeneration zone of step (b), the gas stream leaving the scrubbing zone being free from BTEX.
Bibliography:Application Number: EP19960402157