Method for preparing supported iron oxide series desulfurizing agent

An iron oxide-based, supported technology, applied in the direction of sulfur preparation/purification, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problem of uneven loading of active components, affecting the desulfurization effect and desulfurization efficiency of iron oxide desulfurizers and other problems, to achieve uniform distribution, ensure desulfurization activity, and increase the effect of contact area

Active Publication Date: 2011-05-11
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For this reason, the technical problem to be solved by the present invention is that the preparation method of the iron oxide desulfurizer in the prior art adopts the usual impregnation process. The components cannot all enter the channel of the carrier smoothly, resulting in uneven loading of the active components on the carrier, which affects the desulfurization effect and desulfurization efficiency of the iron oxide desulfurizer, and then provides a high-pressure and negative-pressure environment. The preparation method of fully dispersing the active components of the desulfurizing agent in the pores of the carrier to obtain a desulfurizing agent with greater mechanical compressive strength and greater breakthrough sulfur capacity

Method used

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  • Method for preparing supported iron oxide series desulfurizing agent

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] Take 30g of ferrous sulfate heptahydrate and dissolve it in 70g of water to make a solution, measure 20g of alumina spheres with a diameter of 5mm and immerse in 30ml of ferrous sulfate heptahydrate solution, put it into the container and seal it, and use a vacuum pump to make the pressure inside the container reach -0.08MPa , soaked for 2 hours. Take it out, drain the excess ferrous sulfate heptahydrate solution, drain the sphere, and dry it at 85°C for 1 hour.

[0029] Put the obtained alumina sphere into the ferrous sulfate heptahydrate solution with a mass concentration of 30%, put it into a container and seal it, use a vacuum pump to make the pressure in the container reach -0.08MPa, and soak for 2 hours. Take it out, drain the excess ferrous sulfate heptahydrate solution, and dry it at 50°C for 10 hours.

[0030] Put the dried sphere into 39.7ml of potassium hydroxide solution with a concentration of 3mol / L, put it into a container and seal it, use a vacuum pump ...

Embodiment 2

[0032] Dissolve 90g of ferric chloride in 110ml of water, measure 30g of alumina spheres with a diameter of 3mm, put them into 50ml of ferric chloride solution, put them into a container and seal them, use a vacuum pump to make the pressure in the container reach -0.1MPa, and soak for 8 hours. Take it out, filter out the excess ferric chloride solution, drain the spheres, and dry them at 85°C for 1 hour.

[0033] Put the dried sphere into 83.3ml of 3mol / L sodium hydroxide solution, put it into a container and seal it, use a vacuum pump to make the vacuum in the container reach 0.07MPa, and soak for 2 hours. Remove the spheres and drain the water.

[0034] Then wash with water at 40°C until there is no chloride ion in the eluent. Then dry at 85°C for 1 hour to obtain hydrated iron oxide desulfurizer B.

Embodiment 3

[0036] Dissolve 80g of ferric chloride in 120ml of water, measure 30g of alumina spheres with a diameter of 6mm, put them into 50ml of ferric chloride solution, put them into a container and seal them, use a vacuum pump to make the pressure inside the container reach 3MPa, and soak for 16 hours. Take it out, filter out the excess ferric chloride solution, drain the spheres, and dry them at 70°C for 3 hours.

[0037] Put the dried sphere into 62.5ml of 4mol / L sodium hydroxide solution, put it into a container and seal it, use a vacuum pump to make the vacuum in the container reach 0.09MPa, and soak for 2 hours. Remove the spheres and drain the water.

[0038] Then wash with water at 60°C until there is no chloride ion in the eluent. Then dry at 70°C for 3 hours to obtain hydrated iron oxide desulfurizer C.

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Abstract

The invention discloses a method for preparing a supported iron oxide series desulfurizing agent. The preparation method comprises the following steps: a) preparing soluble iron salt solution and alkali solution; b) putting a porous material serving as a carrier into the soluble iron salt solution prepared in the step a), and soaking under the condition that the pressure is less than 3MPa and not equal to normal pressure; c) drying the carrier soaked in the step b) at the temperature of between 30 and 85 DEG C for 1 to 24 hours; d) putting the dried carrier obtained in the step c) into the alkali solution, and soaking under the condition that the pressure is less than 3MPa and not equal to normal pressure; e) drying or draining the carrier obtained in the step c), and eluting the carrier by using water of 20 to 80 DEG C till the eluted water has no negative ions; and f) drying the carrier obtained in the step e) for 1 to 24 hours at the temperature of between 30 and 85 DEG C to obtain the desulfurizing agent. The desulfurizing agent prepared by adopting the method has the advantages of high accumulative sulfur capacity, high mechanical strength, abrasion resistance and the like, is easy to regenerate, and is widely applied in the fine desulfuration process of petroleum industry, chemical industry and the like.

Description

technical field [0001] The invention relates to a preparation method of a desulfurizing agent. Specifically, it is a method for preparing an iron oxide-based desulfurizer at normal temperature. Background technique [0002] Sulfides are produced in many occasions in industrial production. For example, in the production process of producing chemical raw materials from coal or petroleum, as well as in the wastewater or waste gas discharged from general industrial production. Among them, in the production process of producing chemical raw materials from coal or petroleum, the hydrogen sulfide produced is mainly due to the fact that the raw materials contain more sulfur-containing substances, which cause the sulfur-containing substances to react during the production process and release hydrogen sulfide. , which directly leads to the poisoning and deactivation of catalyst active substances in the subsequent production process. In addition, sulfides such as hydrogen sulfide an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/48B01D53/86B01J23/745B01J37/02C01B17/04
Inventor 张周珺吴志强
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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