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Solid desulfurating agent

A desulfurization agent and solid technology, which is applied in the field of desulfurization purification, can solve the problems that the powder cannot be used directly and affects the desulfurization efficiency, and achieves the effects of facilitating regeneration, improving desulfurization efficiency, and improving mechanical strength

Active Publication Date: 2009-12-02
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] What the present invention is to solve is that in the prior art, the cubic crystal phase Fe 3 o 4 , amorphous Fe 2 o 3 , amorphous Fe 2 o 3 ·H 2 The powder whose O is the active component of the desulfurizer cannot be directly used in the desulfurization process of high-temperature coal gasification raw materials, and after adding conventional binders, the mechanical strength of the desulfurizer can only be improved by increasing the bonding force between the active components, and It will affect the desulfurization efficiency of the desulfurizer to a certain extent; and then provide a method that can improve the mechanical strength of the desulfurizer by increasing the bonding force between the active components and providing the internal support of the desulfurizer without affecting the desulfurization. Cubic crystal phase Fe can be directly used in high temperature coal gasification feedstock desulfurization process. 3 o 4 , amorphous Fe 2 o 3 , amorphous Fe 2 o 3 ·H 2 O is the desulfurizer active component of the desulfurizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 32g of ferrous sulfate powder and 12g of sodium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.8; put the above mixed material into a kneader, and knead for 3 hours to complete the solidification between the above reactants. Reaction, then the above reaction product is placed in the air to dry, in order to facilitate the full completion of the above reaction.

[0019] Stir the dried material with water first, and wash repeatedly until the obtained filtrate has no sulfate radicals (usually tested with barium chloride), and then use a centrifuge to filter the above washing liquid.

[0020] Dry the washed and filtered solid above at a temperature of 70° C. and a drying time of 4 hours. It can be obtained by 3.5wt% cubic crystal phase Fe 3 o 4 , 28wt% amorphous Fe 2 o 3 , 62wt% amorphous Fe 2 o 3 ·H 2 O and the balance of water and the above-mentioned reaction by-products.

[0021]Mix 42g of solid ferrous sulfate and 142g of calcium hydrox...

Embodiment 2

[0024] Mix 64g of ferrous sulfate powder and 21.2g of sodium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.4; put the above mixed material into a kneader and knead for 0.5h to complete the reaction between the above reactants. The solid-phase reaction was carried out, and then the above reaction product was air-dried.

[0025] Stir the dried material with water first, and wash repeatedly until the obtained filtrate has no sulfate radicals (usually tested with barium chloride), and then use a centrifuge to filter the above washing liquid.

[0026] The above-mentioned washed and filtered solid was naturally dried at a drying temperature of 2° C. and a drying time of 148 h. It can be obtained by 3.3wt% cubic crystal phase Fe 3 o 4 , 29wt% amorphous Fe 2 o 3 , 61wt% amorphous Fe 2 o 3 ·H 2 O and the balance of water and the above-mentioned reaction by-products.

[0027] Mix 42g of solid ferrous sulfate and 142g of calcium hydroxide, and add 80ml of ...

Embodiment 3

[0030] Mix 34.2g of ferrous nitrate powder and 23.4g of potassium hydroxide evenly, wherein the molar ratio of iron to hydroxide is 1:2.0; put the above mixed material into a kneader and knead for 1.0h to complete the reaction of the above reactants The solid-phase reaction between them was carried out, and then the above-mentioned reaction product was placed in the air to dry.

[0031] Stir the dried material with water first, and wash repeatedly until the obtained filtrate has no sulfate radicals (usually tested with barium chloride), and then use a centrifuge to filter the above washing liquid.

[0032] The above-mentioned washed and filtered solid was dried naturally at a drying temperature of 45° C. and a drying time of 6 hours. It can be obtained by 3.0wt% cubic crystal phase Fe 3 o 4 , 30wt% amorphous Fe 2 o 3 , 60wt% amorphous Fe 2 o 3 ·H 2 O and the balance of water and the above-mentioned reaction by-products.

[0033] Mix 42g of solid ferrous sulfate and 142...

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Abstract

The invention relates to a solid desulfurating agent, comprising an active constitute cubic system crystalline phase Fe3O4, amorphism Fe2O3 and amorphism Fe2O3.H2O, and a paste product which is obtained from the reaction of assistant binder ferrous sulphate salt and calcium hydroxide; the invention further disclose a preparation method of the solid desulfurating agent on the basis of disclosing the constitutes of the solid desulfurating agent. The side pressure strength of the solid desulfurating agent prepared by the method in the invention can be as high as 85N / cm, and can be widely applied to the desulfurating technique of high temperature coal gasification materials.

Description

technical field [0001] The invention relates to a solid desulfurizing agent that can be used for high-temperature desulfurization, and belongs to the technical field of desulfurization and purification. Background technique [0002] With the increasing shortage of petroleum resources, the use of coal gasification products instead of petroleum as new energy and chemical raw materials has become a topic of widespread concern in the world. However, most coal gasification raw materials contain a large amount of hydrogen sulfide gas, which is likely to cause serious pollution to the environment; and the existence of hydrogen sulfide gas will also cause corrosion to the equipment used in the subsequent processing and utilization of coal gasification raw materials, and even affect industrial production. The catalyst is poisoned and deactivated, so in order to speed up the process of coal gasification products replacing oil, it is necessary to find an economical and efficient method...

Claims

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Application Information

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IPC IPC(8): C10K1/20B01D53/48
Inventor 刘凤仁刘振义喻永生
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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