Process for desulphurization of gases
OwnerJean-Jacques VANDEN EYNDE, Yohann BENCHABANEinventors
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Abstract
A wet process for the desulphurization of hydrogen sulphide laden gas, including absorption of hydrogen sulphide in aqueous medium by a carbonate salt, oxidation of hydrogenosulphide into elemental sulphur in the presence of a vanadium compound with concomitant reduction of said vanadium compound, re-oxidation of said vanadium compound in the presence of the couple quinone-2-sulfonic acid/hydroquinone-2-sulfonic acid or quinone-2-phosphoric acid/hydroquinone-2-phosphoric acid or a salt thereof, the substituted hydroquinone catalyst being re-oxidized in the presence of oxygen.
Claims15
Wet process for the desulphurization of gases containing hydrogen sulphide, comprising absorption of hydrogen sulphide in aqueous medium by a carbonate salt, oxidation of hydrogenosulphide into elemental sulphur in the presence of a vanadium compound with concomitant reduction of said vanadium compound, re-oxidation of said vanadium compound in the presence of the couple quinone-2-sulfonic acid/hydroquinone-2-sulfonic acid or quinone-2-phosphoric acid/hydroquinone-2-phosphoric acid or a salt thereof, the substituted hydroquinone catalyst being re-oxidized in the presence of oxygen.
Process for the preparation of hydroquinone-2-sulfonic acid and salts thereof comprising the preparation of a solution of benzoquinone in ethyl acetate or 2-propanol and cooling at approx. 0° C., preparation of a solution of bisulfite in water, mixing both solutions and stirring at a temperature between 0° C. and ambient temperature, allowing the mixture to settle, and drawing off the aqueous layer, and possibly recycling the organic layer.
Dependencies are inferred from the claim text.