【発明の名称】サワ-ガス流からのH▲下2▼Sの除去方法

Japanese Patent JPH0712412

B2

Process for the removal of H2S from a sour gaseous stream comprising contacting the sour gaseous stream with aqueous reactant solution in contacting zone (2) at a temperature below the melting point of sulphur, the reactant solution containing solubilized coordination complex of Fe (III) with nitrilotriacetic acid under conditions to convert H2S, producing a gaseous stream having reduced H2S content, and aqueous mixture containing solid sulphur and an increased concentration of solubilized coordination complex of Fe (II) with nitrilotriacetic acid, removing aqueous mixture from the contacting zone (2) and separating a minor portion of the mixture having an increased solid sulphur concentration, heating mixture having an increased sulphur concentration in an at least substantially oxygen free environment (10) to a temperature sufficient to melt the sulphur to produce a solution of solubilized coordination complexes of iron with nitrilotriacetic acid containing molten sulphur, and separating molten sulphur-containing solution in an at least substantially oxygen-free separation zone (12) at a temperature at or above the melting point of sulphur into an upper phase comprising substantially sulphur-free solution of solubilized coordination complexes of non with nitrilotriacetic acid and a lower phase comprising molten sulphur.

Howard Rum-Hou Hoong
The Aida Days
Giyogi Constantine Britas

JP19412486A

February 15, 1995

August 21, 1986

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Ciel Inter-Nail Yone Lisa-Chi Ma-Chat

B01D53/52; B01D53/14; B01D53/77; B01J31/22; B01J38/12; C01B17/05; C10G27/10; C10L3/10; (IPC1-7): B01D53/52; B01D53/14; B01D53/77; B01J31/22; B01J38/12; C10G27/10; C10L3/10

JP461010A
JP57197022A
JP60153921A
JP61161118A

Kawahara Kazuho

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