Catalytic oxidation adsorption desulfurizer and preparation method thereof

A technology of adsorption desulfurization and catalytic oxidation, which is applied in the direction of chemical instruments and methods, separation methods, and dispersed particle separation, can solve the problems of large one-time investment, no economic benefits of tail gas hydrogenation equipment, and high operating costs, so as to reduce the share The effect of floor area, meeting environmental protection and economy, and saving operating costs

Inactive Publication Date: 2010-02-17
山东迅达化工集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] The biggest disadvantage of this process is the large one-time investment. The investment in the tail gas hydrotreating unit is 1.5 times the investment in the previous sulfur recovery unit, and due to the need for hydrogenation, amine absorption, amine liquid desorption and other operations

Method used

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  • Catalytic oxidation adsorption desulfurizer and preparation method thereof
  • Catalytic oxidation adsorption desulfurizer and preparation method thereof
  • Catalytic oxidation adsorption desulfurizer and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0045] Take industrial ferrous sulfate FeSO 4 ·7H 2 O 2780g, dissolve in 5L deionized water, add 2800ml25% ammonia water to react during the stirring process, after the precipitation is complete, pour off the supernatant liquid, wash the precipitate with deionized water several times until it is dissolved with 1% BaCl 2 The solution is undetectable without SO 4 2- until. Filter the precipitate, dry it in the air, add 200g of high alumina cement, 20g of carboxymethyl cellulose, and 15g of polyethylene glycol dimethyl ether, knead in a kneader for 30 minutes, and extrude through a 4mm diameter orifice on the extruder , dried in the air, dried in an oven at 120°C for 12 hours, and roasted in a roasting furnace at 300°C for 6 hours to obtain desulfurizer sample 1. The specific surface area of ​​sample 1 is 145m 2 / g, the average crushing strength is 135 Newton / cm. The bulk density is 0.83g / ml.

Embodiment 2

[0047] Take industrial ferrous sulfate FeSO 4 ·7H 2 O 2780g, dissolve in 5L deionized water, add 8000g 10% NaOH solution to react during the stirring process, after the precipitation is complete, pour off the supernatant liquid, wash the precipitate with deionized water several times until it is washed with 1% BaCl 2 The solution is undetectable without SO 4 2- until. Filter the precipitate, dry it in the air, add 150g of activated alumina powder, 80g of calcium oxide powder, 50g of scallop powder, and 25g of polyethylene glycol, knead in a kneader for 30 minutes, and extrude it through a 4mm orifice plate on the extruder. Strips were air-dried, dried in an oven at 120°C for 12 hours, and fired in a roasting furnace at 300°C for 6 hours to obtain a desulfurizer sample 2. The technical requirements of activated alumina powder used in this example are as follows: specific surface area > 500m 2 / g, bulk density1.2ml / g. The technical requirements of calcium oxide powder used...

Embodiment 3

[0049] Get 404g iron nitrate Fe (NO 3 ) 3 9H 2 O was dissolved in 1000ml of deionized water, 15g of tetrasodium edetate was added, fully stirred until it was completely dissolved and a transparent solution was obtained, 1000g of coconut shell activated carbon with a diameter of 4mm was put into a rolling ball forming machine, and the above-mentioned The solution was sprayed on activated carbon until it was completely sucked dry, then sprayed 500ml of 10% ammonia solution, dried at room temperature for 12 hours, dried in an oven at 150°C for 12 hours, and dried under N 2 Calcined at 350°C for 5 hours under protected conditions to obtain desulfurizer sample 3. The technical requirements of the coconut shell activated carbon used are as follows: the appearance diameter is 4mm, the iodine adsorption value is greater than 1000mg / g, the strength is greater than 95%, and the specific surface area is greater than 1050m 2 / g, bulk density 0.45~0.55g / ml. The specific surface area of ...

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Abstract

The invention relates to a catalytic oxidation adsorption desulfurizer and a preparation method thereof, belonging to the technical field of sulfur recovery. The adsorption desulfurizer is used to remove H2S and SO2 separately or at the same time and is characterized in that the desulfurizer is prepared from active component and carrier through extruding, kneading and soaking methods, wherein theactive component of the desulfurizer is the oxides of Fe, Ti and V or the salts thereof and the carrier is one or more of aluminum oxide, calcium oxide, silicon oxide and activated carbon. The desulfurizer of the invention combines the catalytic oxidation technology and adsorption desulfurization technology, the desulfurization capacity is more than 50%, the outlet of the desulfurizing tower doesnot contain H2O, and the content of SO2 is greatly less than 960mg/m<3> so as to meet the emission standard of national GB16297-1996. the desulfurizer which is after saturation adsorption is rich in more than 50% of sulfur element and is sent to a production facility of sulphuric acid to prepare concentrated sulphuric acid and recycled metals, thus having no environmental pollution problem.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, and in particular relates to a catalytic oxidation adsorption desulfurizer and a preparation method thereof. The catalyst of the present invention is mainly used in Claus sulfur recovery unit. Background technique [0002] Sulphides in crude oil or coal are converted to H during processing 2 S, and H 2 S is a highly toxic substance, which has a great poisonous effect on the human body and the environment. It must be treated in a harmless manner. The most suitable process is the sulfur recovery process. [0003] The acid gas in the refinery mainly comes from catalytic dry gas desulfurization, coking dry gas desulfurization, sewage gas stripping tower gas, hydrotreating unit desulfurization and other devices. The main processing flow of sour gas in refinery is: [0004] Sulfur in crude oil→petroleum processing (atmospheric and vacuum)→gasoline\kerosene\diesel→hydrofining→H2S→sulfur reco...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/52
Inventor 胡文宾崔传义王强朱敦富杨金帅陈辉崔国栋
Owner 山东迅达化工集团有限公司
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