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Method for regenerating zinc oxide desulfurization waste agent

A zinc oxide and desulfurizing agent technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of high cost, unsuitable for industrial application, etc., reduce the regeneration cost, be beneficial to industrial production, and improve the reaction yield. rate effect

Active Publication Date: 2014-10-08
福建三聚福大化肥催化剂国家工程研究中心有限公司 +1
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  • Abstract
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Problems solved by technology

[0005] The present invention solves the problem that the regeneration method of zinc oxide desulfurization waste agent in the prior art is unsuitable for industrial application due to its high cost, and further provides a regeneration method that not only has a high recycling rate of zinc, but also can greatly reduce the regeneration cost. Regeneration method of zinc oxide desulfurization waste agent

Method used

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  • Method for regenerating zinc oxide desulfurization waste agent
  • Method for regenerating zinc oxide desulfurization waste agent

Examples

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Effect test

Embodiment 1

[0021] The regeneration method of zinc oxide desulfurization waste agent described in the present embodiment is:

[0022] Add 1g of zinc oxide desulfurization waste agent and 70mL of deionized water to a 100mL hydrothermal reaction kettle in sequence, place the hydrothermal reaction kettle in an oven at 200°C for 24 hours, cool naturally after the reaction is completed, and filter the reaction solution. Collect the filter residue, wash the filter residue 6 times with deionized water, and dry at 110° C. for 10 hours to obtain a regenerated zinc oxide desulfurizer. Grind the regenerated zinc oxide desulfurizer into a powder of more than 200 meshes, and use X-ray diffractometer (XRD) to carry out structural characterization, such as figure 1 As shown, the diffraction peak changes of zinc oxide and zinc sulfide were observed.

Embodiment 2

[0024] The regeneration method of zinc oxide desulfurization waste agent described in the present embodiment is:

[0025] Add 1g of zinc oxide desulfurization waste agent, 60mL of deionization and 10mL of ammonia water to a 100mL hydrothermal reaction kettle in sequence, place the hydrothermal reaction kettle in an oven at 250°C for 12 hours, cool naturally after the reaction is completed, and dissolve the reaction solution filtering, collecting the filter residue, washing and drying the filter residue to obtain a regenerated zinc oxide desulfurizer.

Embodiment 3

[0027] The regeneration method of zinc oxide desulfurization waste agent described in the present embodiment is:

[0028] Add 1g of zinc oxide desulfurization waste agent, 50mL of deionization and 20mL of ammonia water to a 100mL hydrothermal reaction kettle in sequence, place the hydrothermal reaction kettle in an oven at 200°C for 24 hours, cool naturally after the reaction is completed, and dissolve the reaction solution Filter, collect the filter residue, wash the filter residue 6 times with deionized water, and dry at 110° C. for 10 hours to obtain a regenerated zinc oxide desulfurizer. Grind the regenerated zinc oxide desulfurizer into a powder of more than 200 mesh, and use XRD for structural characterization, such as figure 2 As shown, the diffraction peak changes of zinc oxide and zinc sulfide were observed.

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Abstract

The invention discloses a method for regenerating a zinc oxide desulfurization waste agent. The method comprises the following steps: reacting a zinc oxide desulfurization waste agent and deionized water in a hydrothermal reaction kettle at the temperature of 150-250 DEG C for 12-48 hours, wherein a mass ratio of the zinc oxide desulfurization waste agent to the deionized water is 1 to 70, filtering a reaction solution after the reaction is ended, collecting filter residues, washing the filter residues, and drying to obtain the regenerated zinc oxide desulfurization agent. Because the reaction is performed in a high-temperature high-pressure closed environment, refractory zinc oxide materials in the zinc oxide desulfurization waste agent are in full contact with the deionized water to carry out a chemical reaction, and the regenerated zinc oxide desulfurization agent can be obtained through a one-step reaction only. Therefore, the regeneration method of the zinc oxide desulfurization agent are simple and short in steps, low in energy consumption, time / labor-saving and convenient to operate, the regeneration cost of the zinc oxide desulfurization waste agent is greatly reduced, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a method for regenerating waste zinc oxide desulfurization agent, which belongs to the field of preparation of zinc oxide desulfurization agent. technical background [0002] As a medium and high temperature desulfurizer, zinc oxide desulfurizer is widely used in synthetic ammonia, hydrogen production, synthetic methanol, coal chemical industry, petroleum refining and other industries because of its good desulfurization performance, easy use and stable performance. field plays an important role. During the desulfurization process, the zinc oxide desulfurizer chemically reacts with the sulfide in the material to be desulfurized to produce extremely stable zinc sulfide (its solubility product constant is as high as 1.2×10 -23 ), so that the gaseous sulfur in the material to be desulfurized is solidified to achieve the purpose of desulfurization, and the desulfurized zinc oxide is discarded due to loss of activity. Nearly 10,000...

Claims

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Application Information

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IPC IPC(8): B01D53/96
Inventor 林科陈崇启林性贻江莉龙
Owner 福建三聚福大化肥催化剂国家工程研究中心有限公司
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