Process of pre-treatment of natural gas containing H2S.

摘要

Pretreatment process for water-saturated, hydrogen sulphide-contg. natural gas, under pressure from one or more prodn. wells, involves: (a) contacting the natural gas (1) with recycled liq. condensate (2) from a subsequent stage (d) in a contacting and vaporisation zone (5) and recovering a hydrogen sulphide- and hydrocarbon-contg. most of the hydrogen sulphide, water and a minor portion of the hydrocarbon, at the bottom of the zone; (b) cooling and condensing the vapour phase in a refrigeration or expansion zone (20); (c) separating the resulting condensate in a sepn. zone (3) and recovering a hydrocarbon-enriched and hydrogen sulphide-depleted gas (30) and a hydrogen sulphide-enriched and hydrogen-contg. liq. condensate (2); (d) recycling and condensate (2) to the contacting zone (5); and (e) reintroducing the liq. effluent (7) into the prodn. well or another well.