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Recyclable desulfurizing agent and preparation method and regeneration method thereof

A desulfurizer and elemental sulfur technology, applied in the direction of sulfur preparation/purification, chemical instruments and methods, and other chemical processes, can solve the problems of low sulfur capacity of desulfurizers, failure to regenerate or difficulty in regeneration, and achieve high sulfur capacity, Improve stability and purity, loose structure effect

Active Publication Date: 2013-10-16
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] For this reason, the technical problem to be solved by the present invention is to overcome the disadvantages of low sulfur capacity of desulfurizers in the prior art, which cannot be regenerated or are difficult to regenerate, so as to propose a desulfurizer with high sulfur capacity that can be industrially produced in large quantities and repeatedly regenerated. agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0029] 3040 g of solid FeSO 4 ·7H 2 O is made into an aqueous solution and placed in a reaction kettle, and the aqueous solution made of 900 grams of solid NaOH is added under stirring conditions, and the reaction temperature does not exceed 90°C by controlling the feeding rate of the NaOH solution. After the reaction is completed, filter and wash the filter cake with water. , until the Na in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 15%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 90°C to obtain a material containing amorphous iron oxyhydroxide. The mass percentage of amorphous iron oxyhydroxide in the material is 85%, and the remaining components are residual Na 2 SO 4 , water and TiO...

Embodiment 2

[0036] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0037] Put 750 grams of KOH into an aqueous solution in the reactor, add 1270 grams of FeCl2 4H under stirring conditions 2 The aqueous solution made of O, by controlling FeCl 2 The feeding speed of the solution is such that the reaction temperature does not exceed 50°C. After the reaction is completed, filter and wash the filter cake with water until K + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 15%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 100°C to obtain a material containing amorphous iron oxyhydroxide. The mass percentage of amorphous iron oxyhydroxide in the material is 80%, and the remaining components are KCl , water and unknown impurities, the sulfur capacity of the material is 50%. where K + ...

Embodiment 3

[0043] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0044] Fe(NO 3 ) 2 ·6H 2 O is made into an aqueous solution and placed in a reaction kettle, and the aqueous solution made of solid NaOH is added under stirring conditions, and the reaction temperature is maintained at 30-40°C by controlling the feeding speed of the NaOH solution, and the pH of the solution at the end of the reaction is controlled = 7.5 , filter the solution, and wash the filter cake with water until Na in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 10%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 85°C to obtain a material containing amorphous iron oxyhydroxide. The mass percentage of amorphous iron oxyhydroxide in the material is 99%, and the remaining components are water...

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PUM

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Abstract

The invention relates to a recyclable high-sulfur capacity dry desulfurizing agent. The desulfurizing agent contains no less than 88 percent of material containing amorphous hydroxy iron oxide and no less than 7 percent of organic binder, wherein the organic binder is one or more of sodium carboxymethyl cellulose, sesbania powder and cellulose powder. The invention further discloses a preparation method for the desulfurizing agent and a recycling method for a waste agent generated after the desulfurizing agent is used. The recyclable high-sulfur capacity dry desulfurizing agent solves the problems of low sulfur capacity of the dry desulfurizing agent in the prior art, and waste of effective resources in the primary desulfurizing agent and new environmental pollution caused by embedding a large amount of waste agent due to regeneration incapability after one-time use or high regeneration cost.

Description

technical field [0001] The invention relates to a recyclable desulfurizing agent for dry desulfurization, which belongs to the technical field of desulfurizing agents. Background technique [0002] Sulfides are produced in many occasions in industrial production, such as in the production process of producing chemical raw materials from coal or petroleum and in the waste water or waste gas discharged from industrial production. Among them, in the production process of producing chemical raw materials from coal or petroleum, since the raw materials contain a lot of sulfur-containing substances, these sulfur-containing substances react to release hydrogen sulfide during the production process, which directly leads to catalysts in subsequent production sections. The active substance is inactivated by poisoning. In addition, sulfides such as hydrogen sulfide and other sulfides contained in waste water or waste gas discharged from industrial production will seriously affect the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C01B17/02C01B17/04
Inventor 刘振义喻永生
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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