Method for oxidatively removing hydrogen sulfide

A hydrogen sulfide and removal technology, applied in the field of oxidative removal of hydrogen sulfide and hydrogen sulfide treatment, can solve the problems of inapplicability of high-concentration pollutants or gaseous pollutants, the reaction is limited by pH, and the equipment investment is large, so as to reduce construction costs. Investment, uncomplicated structure, and the effect of reducing energy consumption

Inactive Publication Date: 2018-11-27
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

But there are still the following disadvantages: 1) a large amount of metal ions are stripped out to form secondary pollution; 2) the reaction is severely restricted by pH (as the Fenton system needs to be processed at pH3-4), 3) the investment in equipment is large (as wet oxidation), which is difficult for high Concentration pollutants or gaseous pollutants Not applicable

Method used

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  • Method for oxidatively removing hydrogen sulfide
  • Method for oxidatively removing hydrogen sulfide
  • Method for oxidatively removing hydrogen sulfide

Examples

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example 1

[0026] Reagent preparation: 200g / L sodium hydroxide solution (CAS: 1310-73-2, analytically pure, Shanghai Lingfeng Chemical Reagent Co., Ltd.), 1M hydrochloric acid solution (CAS: 7647-01-0, analytically pure, Shanghai Lingfeng Chemical Reagent Co., Ltd.), 5g / L zinc acetate solution (CAS: 557-34-6, analytically pure, Shanghai Titan Technology Co., Ltd.), 50g / L iodine stock solution (CAS: 7553-56-2, analytically pure, Shanghai Titan Technology Co., Ltd.), 5g / L iodine solution, 0.01M sodium thiosulfate standard titration solution (CAS: 10102-17-7, analytical grade, Shanghai Lingfeng Chemical Reagent Co., Ltd.), 5g / L starch indicator solution ( CAS: 9005-25-8, analytically pure, Shanghai Titan Technology Co., Ltd.). The above reagents are prepared according to the standard in GB / T11060.1-1998.

[0027]The experimental device is shown in the figure to simulate the treatment of waste gas containing hydrogen sulfide. There is 2.4 mg of sodium sulfide nonahydrate in the three-necke...

example 2

[0032] The present invention adopts sodium sulfide nonahydrate (CAS: 131-84-4, analytically pure, Shanghai Titan Technology Co., Ltd.) Analytical grade, Shanghai Titan Technology Co., Ltd.)-borax (CAS: 1303-96-4, analytical grade, Shanghai Titan Technology Co., Ltd.) buffer was adjusted to the required pH value. The concentration of sodium sulfide nonahydrate solution is 10 -4 M. Sodium bicarbonate (CAS: 144-55-8, analytically pure, Shanghai Lingfeng Chemical Reagent Co., Ltd.) solution was used as the activator. Add 0.1M sodium chloride (CAS: 7647-14-5, analytical grade, Sinopharm Chemical Reagent Co., Ltd.) to maintain the ionic strength of the solution. Add EDTA (CAS: 6381-92-6, analytically pure, Shanghai Lingfeng Chemical Reagent Co., Ltd.) to reduce metal ion to hydrogen peroxide ((CAS: 7722-84-1, purity=30wt%, Sinopharm Group Chemical Reagent Co., Ltd.) ) catalytic effect.

[0033] The silver / sulfur ion selective electrode and C(K2SO4)-1 reference electrode produced...

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Abstract

The invention relates to a method for oxidatively removing hydrogen sulfide. The method adopts peroxide, or peroxide and oxygen, or mixture of peroxide and air as an oxidant and a compound with an activating effect, namely the compound which can generate carbanions, bicarbonate ions, sulfate ions, borate ions, hydroborate ions, phosphate ions, monohydrogenphosphate ions and dihydrogen phosphate ions in an aqueous solution, as an activator. The method comprises the following steps: mixing the activator and the oxidant, standing at negative 15-85 DEG C for 1-45 minutes, mixing with a hydrogen sulfide solution, stirring to react, or introducing the hydrogen sulfide gas into a hydrogen sulfide absorption liquid to react. Under a weak base condition, the hydrogen sulfide removal rate by the method can be 96-99 percent or above, the corrosion degree on equipment is relatively small, and the reacted product is safe and pollution-free.

Description

technical field [0001] The invention relates to a method for oxidatively removing hydrogen sulfide, in particular to compounding a certain activator solution with hydrogen peroxide to form peroxide ions to oxidize hydrogen sulfide in water or in gaseous form. The method is suitable for treating hydrogen sulfide dissolved in urban sewer sewage or industrial wastewater, hydrogen sulfide in natural gas, biogas and other industrial tail gases, and hydrogen sulfide produced by burning fossil fuels. Belongs to hydrogen sulfide treatment technology Background technique [0002] Sulfur compounds are widely found in industrial tail gases such as natural gas, coke oven gas, fuel oil hydrogenation, rubber tail gas, biogas production, municipal sewage treatment, and livestock and poultry breeding, as well as in fossil fuels. Not only that, urban wastewater and pesticide wastewater also contain a large amount of sulfide. Sulfide can be divided into organic sulfur and inorganic sulfur. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/52B01D53/79C02F1/72C02F1/74C02F103/06
CPCB01D53/52B01D53/79B01D2251/10B01D2251/102B01D2251/106B01D2258/02C02F1/722C02F1/727C02F1/74C02F2103/06
Inventor 杨雪晶温玉真王金岭马良侯淳汪华林
Owner EAST CHINA UNIV OF SCI & TECH
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