A kind of gas phase dechlorination agent and preparation method thereof

A gas phase dechlorination and mixture technology, which is applied in separation methods, chemical instruments and methods, gas treatment and other directions to achieve the effects of improving dechlorination performance, expanding the scope of application, and improving strength

Active Publication Date: 2018-08-03
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of easy chlorine desorption and sintering in the dechlorination agent in the prior art, and then provide a dechlorination agent that does not occur chlorine desorption, has good dechlorination effect, high strength, and can be used at high temperature. Gas-phase dechlorination agent for dechlorination and preparation method thereof

Method used

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  • A kind of gas phase dechlorination agent and preparation method thereof
  • A kind of gas phase dechlorination agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] (1) polyvinyl alcohol is dissolved in water, is mixed with 6wt% polyvinyl alcohol aqueous solution, for subsequent use;

[0031] (2) Calcium acetate is dissolved in water, is mixed with 8wt% calcium acetate aqueous solution, for subsequent use;

[0032] (3) Mix aluminate cement with polyvinyl alcohol aqueous solution, and then mix with magnesium carbonate with a particle size of 1-10nm to form the first mixture; wherein, the amount of polyvinyl alcohol aqueous solution is aluminate cement 35% by weight of mass;

[0033] (4) Calcium hydroxide and calcium acetate aqueous solution are mixed to form the second mixture, and the add-on of calcium acetate aqueous solution is 25wt% of calcium hydroxide quality;

[0034] (5) mixing the first mixture of step (3) with the second mixture of step (4) to form a third mixture, and extruding the third mixture to obtain strips of Φ4mm;

[0035] (6) Put the strip in step (5) to calcine at 290°C for 5 hours, and then calcine the roasted...

Embodiment 2

[0038] (1) polyvinyl alcohol is dissolved in water, is mixed with 2wt% polyvinyl alcohol aqueous solution, for subsequent use;

[0039] (2) Calcium acetate is dissolved in water, is mixed with 5.5wt% calcium acetate aqueous solution, for subsequent use;

[0040] (3) Mix aluminate cement with polyvinyl alcohol aqueous solution, and then mix with magnesium carbonate with a particle size of 1-10nm to form the first mixture; wherein, the amount of polyvinyl alcohol aqueous solution is aluminate cement 50% by weight of mass;

[0041] (4) Calcium hydroxide and calcium acetate aqueous solution are mixed to form the second mixture, and the addition of calcium acetate aqueous solution is 20wt% of calcium hydroxide quality;

[0042] (5) mixing the first mixture of step (3) with the second mixture of step (4) to form a third mixture, and extruding the third mixture to obtain strips of Φ4mm;

[0043] (6) The strip in step (5) was calcined at 200° C. for 6 hours, and then the calcined pr...

Embodiment 3

[0046] (1) polyvinyl alcohol is dissolved in water, is mixed with 10wt% polyvinyl alcohol aqueous solution, for subsequent use;

[0047] (2) Calcium acetate is dissolved in water, is mixed with 3wt% calcium acetate aqueous solution, for subsequent use;

[0048] (3) Mix aluminate cement with polyvinyl alcohol aqueous solution, and then mix with magnesium carbonate with a particle size of 1-10nm to form the first mixture; wherein, the amount of polyvinyl alcohol aqueous solution is aluminate cement 20 wt% of the mass;

[0049] (4) calcium hydroxide, ferric oxide and calcium acetate aqueous solution are mixed to form the second mixture, wherein, the add-on of ferric oxide is 1.6wt% of calcium hydroxide quality, the add-on of calcium acetate aqueous solution is 30wt% of the mass sum of calcium and ferric oxide;

[0050] (5) mixing the first mixture of step (3) with the second mixture of step (4) to form a third mixture, and extruding the third mixture to obtain strips of Φ4mm; ...

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Abstract

The invention provides a gas phase dechlorination agent, which comprises the following components: 15-30 wt% of calcium carbonate, 10-35 wt% of magnesium carbonate, 7.2-10.8 wt% of calcium oxide and 48-65 wt% of aluminate cement . The dechlorination agent of the present invention utilizes the characteristics that calcium carbonate and magnesium carbonate can form a regular interlayer structure, which is more conducive to the adsorption of chlorine and improves the dechlorination activity, so that the penetration chlorine capacity of the dechlorination agent at 300 ° C is as high as 55%. Improve the strength, so that the lateral pressure strength of the dechlorination agent is as high as 110N / cm when clay is not used, thereby avoiding the use of clay and effectively preventing the dechlorination agent from sintering; at the same time, the strong hygroscopicity of calcium oxide is used to absorb water and convert it into alkali Calcium hydroxide with stronger resistance can promote the absorption capacity of hydrogen chloride, improve the accuracy of dechlorination, hinder the desorption of chlorine from the dechlorination agent, and prevent the coordination reaction between water and the metal chloride generated after the dechlorination agent absorbs chlorine. Avoid the damage of the dechlorination agent structure and the blockage of the internal pores, and effectively improve the chlorine capacity of the dechlorination agent.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a gas-phase dechlorination agent suitable for high-temperature gas dechlorination and a preparation method thereof. Background technique [0002] In the petrochemical industry, the activity of the reforming catalyst in the catalytic reforming process will gradually decline during use, and it needs to be regenerated regularly to restore its activity, and the regeneration process of the reforming catalyst needs to use organic chloride as the regeneration medium to oxygenate the catalyst. Chlorination treatment, during or after the oxychlorination process, part of the residual organic chloride is converted to HCl under high temperature conditions. HCl will cause corrosion to pipelines or equipment as the regenerated gas flows into the subsequent system, or venting will pollute the atmosphere. In addition, if the raw material in the downstream process contains ammonia gas, the mee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/68
CPCB01D53/685B01D53/81B01D2257/2045
Inventor 田薇薇
Owner SHENYANG SANJUKAITE CATALYST
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