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A kind of high-strength iron oxyhydroxide desulfurizer for desulfurization at room temperature and preparation method thereof

An iron oxyhydroxide and desulfurizer technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of reduced desulfurization effect of desulfurizers, reduced pore capacity of desulfurizers, weak binding force between raw materials, etc. The raw material mixture is fine, not easy to absorb water, and the effect of strong adhesion

Active Publication Date: 2016-09-14
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

[0008] The technical problem to be solved by the present invention is that when the iron oxyhydroxide desulfurizer used at normal temperature is prepared in the prior art, because there is no roasting process, the binding force between the raw materials is weak, and the desulfurizer is easily crushed due to pressure. It is common knowledge in the field of catalysts to use peptizers to improve the strength of the dosage form, but researchers in the field of desulfurizers have always believed that adding peptizers when preparing desulfurizers at room temperature will block their pores, reduce the pore volume of the desulfurizers, and make the desulfurizers The desulfurization effect is reduced, and the inventors of the present invention have found through research that adding an appropriate amount of peptizer will not block the pores of the desulfurizer, but also enhance the strength of the desulfurizer, overcoming the long-standing technical prejudice in this field, and then proposed A high-strength iron oxyhydroxide desulfurizer for normal temperature desulfurization and its preparation method

Method used

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  • A kind of high-strength iron oxyhydroxide desulfurizer for desulfurization at room temperature and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Put 500g of α-FeOOH and 10g of squash gum into a mixer and grind for 10 minutes, then add 10g of acetic acid and 200g of water to the above material, continue to mix and grind for 10 minutes to obtain a mixture, knead the mixture well and evenly Put it into a screw extruder and extrude it into a strip shaped product of Φ4×2-10mm, and dry the above-mentioned formed product at -5°C for 24 hours to obtain a high-strength iron oxyhydroxide desulfurizer for desulfurization at room temperature. After testing The sulfur capacity of the desulfurizer is 37.6%, and the radial crush resistance is 87N / cm.

Embodiment 2

[0033] Put 950g of β-FeOOH and 400g of guar gum into the mixer and grind for 45 minutes, then add 400g of nitric acid and 400g of water to the above material, continue to mix and grind for 60 minutes to obtain a mixture, and knead the mixture well Put it into a screw extruder and extrude it into a strip-shaped product of Φ4×2-10mm, dry the above-mentioned formed product at 120°C for 3 hours, and obtain a high-strength iron oxyhydroxide desulfurizer for desulfurization at room temperature. After testing, the The sulfur capacity of the desulfurizer is 34.7%, and the radial crush resistance is 120N / cm.

Embodiment 3

[0035] 700g of γ-FeOOH and 200g of carboxymethyl cellulose were put into a mixer and mixed for 30 minutes, then added 150g of hydrochloric acid and 350g of water to the above material, and continued to mix for 40 minutes to obtain a mixture, and the mixture was fully After kneading evenly, put it into a screw extruder to extrude into a strip-shaped product of Φ4×2-10mm, and dry the above-mentioned formed product at 100°C for 10 hours to obtain a high-strength iron oxyhydroxide desulfurizer for desulfurization at room temperature. The sulfur capacity of the desulfurizer was tested to be 33.7%, and the radial crush resistance was 98N / cm.

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Abstract

The invention relates to a high-strength ferric hydroxide desulfurizer used for normal temperature desulfurization. Preparation raw materials comprise ferric hydroxide, an organic binder, an inorganic binder and an auxiliary agent. A preparation method of the desulfurizer comprises the following steps: uniformly mixing the raw materials, adding a peptizer and water, continuously mixing, carrying out kneading molding, and drying to obtain the ferric hydroxide desulfurizer. The peptizer comprises one or more of organic acids and inorganic acids, and the added peptizer is helpful for improving the strength and the compressive strength of the desulfurizer, and does not obstruct the pore paths of the desulfurizer. A technical bias that the addition of the peptizer obstructs the pore paths of the desulfurizer is overcome in the invention.

Description

technical field [0001] The invention relates to a high-strength iron oxyhydroxide desulfurizer used in a normal temperature environment, belonging to the technical field of desulfurization and purification. Background technique [0002] Industrial raw materials made from coal or petroleum, as well as waste water and waste gas discharged from industrial production processes contain sulfides, among which hydrogen sulfide contains the most; in industrial raw materials, the presence of sulfides will cause The catalyst is poisoned and deactivated, and the sulfides in the waste water and waste gas are directly discharged to the outside, which will cause harm to the environment and humans and animals. Therefore, it is necessary to remove the sulfides in industrial raw materials and waste water and waste gas in time before they can be used later . [0003] Among many desulfurization methods, the use of desulfurizers can effectively remove sulfide. The principle of hydrogen sulfide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/30
Inventor 高群仰刘振义汪祥胜李新
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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