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AssigneeRhodia Inc.
InventorsJacques Pierre Sibeud, Charles David Ruff
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A process is provided for removing hydrogen sulfide and alkyl mercaptans from fluid streams by reaction with oxygen in the presence of a metal amino acid chelate in aqueous solution containing an amine, converting hydrogen sulfide to sulfur and alkyl mercaptans to dialkyl disulfides, and separating these from the aqueous metal chelate solution. A process is also provided for removing hydrogen sulfide and alkyl mercaptans from fluid streams in which the gaseous or liquid stream is dispersed in aqueous metal chelate solution in a fine dispersion short of foam formation and passed through a reaction zone at a high flow velocity, where hydrogen sulfide is catalytically oxidized to sulfur, and alkyl mercaptans to dialkyl disulfides, and then into a relatively wide quiescent zone where the dispersion breaks, the gases are separated, and the metal chelate solution recovered.
A cyclic continuous process for the removal of hydrogen sulfide contained in gaseous streams, and the substantially quantitative catalytic conversion thereof to elemental sulfur, while inhibiting the buildup in the system of water-soluble by-products such as sulfates, which comprises contacting the gaseous stream with free oxygen gas and an aqueous solution of a water-soluble polyvalent metal chelate catalyst retaining the metal in soluble form in the aqueous solution, an inorganic alkali in an amount to adjust the pH to within the range from about 6.8 to about 10, and a strongly alkaline free organic amine in an amount within the range from about 0.1% to about 50% sufficient to inhibit water-soluble by-product formation, thereby concurrently forming sulfur and causing polyvalent metal catalyst oxidation and regeneration reactions in the oxidation-reduction metal chelate reaction system to proceed concurrently, while lessening buildup of water-soluble by-products in the catalyst solution;
A cyclic continuous process for the removal of hydrogen sulfide contained in gaseous streams, and the substantially quantitative catalytic conversion thereof to elemental sulfur, while inhibiting the buildup in the system of water-soluble by-products such as sulfates, which comprises contacting the gaseous stream with free oxygen gas and an aqueous solution of a water-soluble polyvalent metal chelate catalyst retaining the metal in soluble form in the aqueous solution and a strongly alkaline free organic amine in an amount within the range from about 5% to about 50% sufficient to adjust the pH to within the range from about 6.8 to about 10 and to inhibit water-soluble by-product formation, thereby concurrently forming sulfur and causing polyvalent metal catalyst oxidation and regeneration reactions in the oxidation-reduction metal chelate reaction system to proceed concurrently, while lessening buildup of water-soluble by-products in the catalyst solution;
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