Compound ionic liquid desulfurizer and preparation method thereof

Abstract

The invention discloses a compound ionic liquid desulfurizer and a preparation method thereof. The desulfurizer is prepared from the following ingredients in percentage by mass: 4-25% of physical solvents and the balance of Fe-IL liquid. The compound ionic liquid desulfurizer and the preparation method thereof have the beneficial effects that by compounding the organic solvents and the Fe-IL liquid, the pH value and the viscosity of the compound desulfurizer can be effectively improved, and the hydrogen sulfide absorptivity of Fe-IL in the desulfurizer is increased; and by adding a corrosion inhibitor, corrosivity of a compounded system to a container can be greatly reduced, and industrial application is better facilitated.

Description

technical field [0001] The invention relates to the technical field of hydrogen sulfide-containing gas purification, in particular to a compound ionic liquid desulfurizer and a preparation method. Background technique [0002] In industrial production, the treatment of small and medium-scale hydrogen sulfide-containing tail gas is often carried out by wet redox method for desulfurization treatment, and H 2 S is directly oxidized into elemental sulfur. The traditional wet oxidative desulfurization has problems such as large consumption of reagents, inability to recycle, poor absorption efficiency, high energy consumption, instability, and easy to cause secondary environmental pollution. Moreover, the country has recently issued a new The "Petroleum Refining Industry Pollutant Discharge Standard (GB31570-2015)" requires that the acid gas recovery unit SO 2 General emission limit 400mg / m 3 , compared with the previous emission limit of 960mg / m 3 More stringent, so some enter...

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Therefore, the desulfurization e

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