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Chelated iron desulfurizer and application method thereof

A technology of desulfurization agent and complex iron, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of poor stability of desulfurization liquid, achieve less liquid circulation, high desulfurization efficiency, and reduce equipment investment Effect

Inactive Publication Date: 2016-01-13
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The DDS desulfurization process developed by the School of Chemistry and Molecular Engineering of Peking University uses porphyrin and heme as iron chelating agents in the desulfurization liquid. This method has high desulfurization efficiency, environmental protection and no pollution; but the stability of the desulfurization liquid is poor

Method used

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  • Chelated iron desulfurizer and application method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: the preparation method of complex iron desulfurizer:

[0055] Ferric ammonium sulfate, ferrous ammonium sulfate, citric acid, and HEDTA are formulated into a solution with a total iron concentration of 2.2g / L according to a molar ratio of 3:1:1.2:3.6, and Na 2 CO 3 19g / L, sodium benzoate 1.3g / L, composite sulfur particle sedimentation agent example a: 0.15g / L, multifunctional corrosion inhibitor example b: 0.4g / L to make complex iron desulfurizer;

Embodiment 2

[0056] Embodiment 2: the preparation method of complex iron desulfurizer:

[0057] Ferric ammonium sulfate, ferric sulfate, ferrous ammonium sulfate, NTA, and HEDTA are formulated into a solution with a total iron concentration of 7g / L in a molar ratio of 3:2:1:6:1.2, and NaOH and NaOH are added to the solution. 2 CO 3 The mixture of equal mass ratio is 35g / L, the mixture of sodium benzoate and sodium thiosulfate is 4.6g / L, the composite sulfur particle sedimentation agent example c: 0.66g / L, the multifunctional corrosion inhibitor example d: 1.3g / L to make complex iron desulfurizer;

Embodiment 3

[0058] Embodiment 3: the preparation method of complex iron desulfurizer:

[0059] Ferric ammonium sulfate, ferric sulfate, ferrous ammonium sulfate, gluconic acid, and NTA are prepared into a solution with a total iron concentration of 12g / L according to a molar ratio of 2:1:1:1:3.6, and KOH and K 2 CO 3 Mixture of equal mass ratio 48g / L, imidazole 7.2g / L, compound sulfur particle sedimentation agent example e: 1.1g / L, multifunctional corrosion inhibitor example c: 3.4g / L to make complex iron desulfurizer;

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Abstract

The invention discloses a chelated iron desulfurizer and application method thereof, and belongs to the technical field of gas purification. The chelated iron desulfurizer comprises the following components: soluble iron salt, an iron salt chelating agent, a sulfide absorbent, a stabilizing agent, a composite particle settling agent, and a multifunctional corrosion inhibitor; wherein the mole ratio of Fe<3+> to Fe<2+> in soluble iron salts is 1:3-5:1; the mole ratio of chelating agent to iron salts is 1.2:1-3:1, and the pH value of the solution is 8.0 to 9.5. The chelated iron desulfurizer is used to remove sulfur under the assistance of a hyper-gravity technology; the desulfurization efficiency is high, the work sulfur capacity is high, the performance of the desulfurizer is stable, and the oxidation regeneration performance is good. The hyper-gravity chelated iron desulfurization technology has the advantages that the technology is simple, the mass transfer efficiency between gas and liquid is high, the equipment is small and can be easily assembled or disassembled, and the technology can be used to remove H2S from natural gas or associated gas in an offshore oil and gas platform.

Description

technical field [0001] The invention relates to a complex iron desulfurizer and a method for using the same, belonging to the technical field of gas purification. Background technique [0002] There are researches on complex iron desulfurizer in the prior art: [0003] The iron chelating agent used in the LO-CAT process desulfurization fluid developed by Wheelabrator Clean Air Systems of the United States is ethylenediaminetetraacetic acid and N-hydroxyethylethylenediaminetriacetic acid, which have good chelating ability for iron and high desulfurization efficiency. High; but the desulfurization operation cost is high and the sulfur capacity is low. [0004] The SulFerox process developed by ShellOil and Dow Chemical Company, and the iron chelating agent used in the desulfurization liquid of the Sulfint process developed by Vienna Technical University and the Austrian United Engineering Company. Large capacity increases the concentration of complexed iron in the desulfuriz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/52B01D53/96
Inventor 刘有智罗莹张巧玲祁贵生郭慧冬祁极冰
Owner ZHONGBEI UNIV
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