A method for liquid-phase oxidative desulfurization and sulfur recovery
A technology of sulfur recovery and liquid-phase oxidation, which is applied in chemical instruments and methods, separation methods, preparation/purification of sulfur, etc., can solve problems such as tower blockage and foaming that have not been completely solved, and achieve tower blockage avoidance, process simplification, Effects from a wide range of sources
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Embodiment 1
[0038] Removal of H 2 The reaction conditions at S are as follows: In the absorber: the temperature is 50°C, the reaction pressure is 0.6MPa, and the 2 The volume ratio of the hourly flow rate of S gas to complex iron desulfurization liquid is 6:1; in the solid-liquid separator: the temperature for cooling and separating sulfur is 10°C.
[0039] Composition of hydrogen sulfide-containing gas (volume): hydrogen sulfide content is 0.62%, SO 20.01% COS, 0.01% COS; oil-complexed iron desulfurization liquid includes: catalytic diesel oil with a distillation range of 240~260°C, Fe ion concentration is 0.06mol / L, and the oil phase:water phase volume ratio is 1:1 . After oxidative desulfurization of desulfurization liquid, H in the purified gas 2 S concentration is 10mg / m 3 , The purity of recovered sulfur is 98%, oil and water are separated every 1 hour, and the absorber is switched at the same time.
Embodiment 2
[0041] Removal of H 2 The reaction conditions at S are as follows: In the absorber: the temperature is 60°C, the reaction pressure is 0.3MPa, and the 2 The volume ratio of the hourly flow rate of S gas to complex iron desulfurization liquid is 3:1; in the solid-liquid separator: the temperature for cooling and separating sulfur is 5°C.
[0042] Composition of hydrogen sulfide-containing gas (volume): hydrogen sulfide content is 0.18%, SO 2 0.1% COS, 0.03% COS; oil-complexed iron desulfurization liquid includes: catalytic diesel oil with a distillation range of 260~280°C, Fe ion concentration is 0.08 mol / L, and the oil phase:water phase volume ratio is 1:2 . After oxidative desulfurization of desulfurization liquid, H in the purified gas 2 S concentration is 12mg / m 3 , The purity of the recovered sulfur is 98.7%, oil and water are separated every 4 hours, and the absorber is switched at the same time.
Embodiment 3
[0044] Removal of H 2 The reaction conditions at S are as follows: In the absorber: the temperature is 80°C, the reaction pressure is 0.1MPa, and the 2 The volume ratio of the hourly flow rate of S gas to complex iron desulfurization liquid is 1:2; in the solid-liquid separator: the temperature for cooling and separating sulfur is 15°C.
[0045] Composition of hydrogen sulfide-containing gas (volume): hydrogen sulfide content is 1.05%, SO 2 0.36% COS, 0.27% COS; oil-complexed iron desulfurization fluid composition includes: catalytic diesel oil with a distillation range of 300-330°C, Fe ion concentration of 0.1 mol / L, where the oil phase: water phase volume ratio is 2: 1. After oxidative desulfurization of the desulfurization liquid, the H in the gas is purified 2 S concentration is 14mg / m 3 , The purity of the recovered sulfur is 97.5%, and the oil and water are separated every 12 hours, and the absorber is switched at the same time.
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