Magnetic ferric oxide desulfurizer and preparation method thereof

A magnetic iron oxide and desulfurizing agent technology, which is applied in chemical instruments and methods, separation methods, combustible gas purification, etc., can solve the problems of insufficient contact between desulfurizing agent and sulfur-containing gas, low mechanical strength, etc., and achieve mechanical strength, The effect of improving mechanical strength and increasing sulfur capacity

Active Publication Date: 2016-05-25
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the invention is to solve the problem of magnetic iron oxide Fe in the prior art 21.333 o 32 The technical problems of insufficient contact between desulfurizer and sulfur-containing gas and low mechanical strength, and then provide a preparation method of magnetic iron oxide desulfurizer with porous structure and high mechanical strength

Method used

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  • Magnetic ferric oxide desulfurizer and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a magnetic iron oxide desulfurizer and a preparation method thereof, the preparation method comprising the following steps:

[0042] S1. After putting 400g of α-FeOOH, 20g of alumina, 30g of fly ash and 10g of squash gum into a mixer and milling for 5 minutes, mixture I was obtained;

[0043] S2. Add 5 g of acetic acid and 200 g of water to the mixture I, continue to mix and grind for 10 minutes, and knead fully to obtain the mixture II;

[0044] S3. Put the mixture II into a screw extruder and extrude it into a strip shaped product of Φ4×2-10mm;

[0045] S4. Dry the strip shaped product at -5°C for 24 hours, and roast the dried material at 200°C for 6 hours to obtain a magnetic iron oxide desulfurizer. After testing, the sulfur capacity of the desulfurizer is 47.6%, and it is resistant to crushing in the radial direction. The force is 96N / cm, and the specific surface area is 105m 2 / g, pore volume 0.48ml / g.

[0046] According to the water re...

Embodiment 2

[0049] This embodiment provides a magnetic iron oxide desulfurizer and a preparation method thereof, the preparation method comprising the following steps:

[0050] S1. Put 900g of β-FeOOH, 100g of diatomaceous earth, 50g of volcanic ash and 100g of guar gum into a mixer and grind for 30 minutes to obtain the mixture I;

[0051] S2, add 100g of nitric acid and 400g of water to the mixture I, continue to mix and mill for 30min, after fully kneading, obtain the mixture II;

[0052] S3. Put the mixture II into a screw extruder and extrude it into a strip shaped product of Φ4×2-10mm;

[0053] S4. Dry the strip shaped product at 120°C for 3 hours, and roast the dried material at 300°C for 3 hours to obtain a magnetic iron oxide desulfurizer. The sulfur capacity of the desulfurizer is 44.8% after testing, and the radial crushing resistance It is 105N / cm, and the specific surface area is 95m 2 / g, pore volume 0.45ml / g.

[0054] According to the water resistance evaluation test, th...

Embodiment 3

[0057] This embodiment provides a magnetic iron oxide desulfurizer and a preparation method thereof, the preparation method comprising the following steps:

[0058] S1, put the carboxymethyl cellulose of the gamma-FeOOH of 700g, 300g pseudo-boehmite, 100g fly ash and 200g into the mixing mill and grind for 15min to obtain the mixture I;

[0059] S2, add 150g of hydrochloric acid and 300g of water to the mixture I, continue to mix and grind for 20min, after fully kneading, obtain the mixture II;

[0060] S3. Put the mixture II into a screw extruder and extrude it into a strip shaped product of Φ4×2-10mm;

[0061] S4. Dry the strip shaped product at 100°C for 10 hours, and roast the dried material at 400°C for 12 hours to obtain a magnetic iron oxide desulfurizer. The sulfur capacity of the desulfurizer is 43.7% and the radial crushing resistance is tested. It is 96N / cm, and the specific surface area is 92m 2 / g, the pore volume is 0.39ml / g.

[0062] According to the water re...

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Abstract

The invention discloses a magnetic ferric oxide desulfurizer and a preparation method thereof. The preparation method comprises the following steps that 1, ferric oxyhydroxide, a binder and an auxiliary are mixed to be uniform, and a mixture I is obtained, wherein the auxiliary adopts coal ash and / or volcanic ash; 2, the mixture I, peptizer and water are mixed to be uniform, and a mixture II is obtained; 3, the mixture II is formed and dried; 4, baking is conducted on a dried forming composition, and the magnetic ferric oxide desulfurizer is obtained. The prepared magnetic ferric oxide desulfurizer has a porous structure and is high in mechanical strength and capable of making full contact with sulfur-containing gas, and the desulfurization efficiency is improved. Desulfurization can be conducted under the working conditions of room temperature to medium temperature, normal pressure to high pressure, high hydrogen sulfide content, high moisture content and different feed gases, in the desulfurization process, the strength of a desulfurizing agent is not reduced, argillation and hardening phenomena do not exist, and the high desulfurization activity is kept all the way.

Description

technical field [0001] The invention belongs to the technical field of desulfurizer preparation, and in particular relates to a magnetic iron oxide desulfurizer and a preparation method thereof. Background technique [0002] With the rapid development of China's national economy, the consumption of natural gas, oilfield associated gas, synthetic gas, coal gas, coal bed methane, biogas, coke oven gas, etc., which are important energy and chemical raw materials, is also increasing. Sulfides not only cause great pollution to the environment, but also corrode equipment and cause subsequent catalyst poisoning, which must be removed and purified. [0003] Gas desulfurization purification at home and abroad is divided into wet desulfurization and dry desulfurization. Wet desulfurization technology is mostly used for the removal of a large amount of sulfide, while dry desulfurization is mostly used for fine desulfurization and has a high degree of purification of inorganic sulfur a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/48C10K1/20C10L3/10
CPCB01D53/48B01D53/81C10K1/20C10L3/103
Inventor 高群仰刘营张君刘振义刘玉军
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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