Gaseous phase dechlorinating agent and preparation method thereof

A gas phase dechlorination, magnesium carbonate technology, applied in separation methods, chemical instruments and methods, gas treatment and other directions, to achieve good dechlorination effect, improve dechlorination performance, prevent sintering effect

Active Publication Date: 2016-06-01
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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  • Gaseous phase dechlorinating agent and preparation method thereof
  • Gaseous phase dechlorinating agent and preparation method thereof

Examples

Experimental program
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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 gaseous phase dechlorinating agent. The gaseous phase dechlorinating agent is prepared from the following components in percentage by weight: 15 to 30 weight percent of calcium carbonate, 10 to 35 weight percent of magnesium carbonate, 7.2 to 10.8 weight percent of calcium oxide and 48 to 65 weight percent of aluminate cement. According to the dechlorinating agent provided by the invention, by using the characteristic that the calcium carbonate and the magnesium carbonate are used to generate a regular sandwich structure, chlorine is adsorbed more favorably, the dechlorinating activity is improved, and the breakthrough chlorine content of the dechlorinating agent at 300DEG C is as high as 55 percent; in addition, the strength can be improved, and the side pressure strength of the dechlorinating agent when clay is not used is as high as 110N/cm, so that the clay is prevented from being used and further the sintering of the dechlorinating agent is effectively prevented; meanwhile, by using high hygroscopicity of calcium oxide, the calcium oxide absorbs water and is converted into calcium hydroxide with higher alkalinity, so that the absorbing ability for hydrogen chloride is promoted, the dechlorinating precision is improved, the desorption of chlorine from the dechlorinating agent is hindered, the condition that water and metal chloride generated by chlorine absorption of the dechlorinating agent generate a coordination reaction is prevented, the damage to a dechlorinating agent structure and the blockage of an internal pore canal are avoided, and the chlorine capacity of the dechlorinating agent is effectively improved.

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 Applications(China)
IPC IPC(8): B01D53/81B01D53/68
CPCB01D53/685B01D53/81B01D2257/2045
Inventor 田薇薇
Owner SHENYANG SANJUKAITE CATALYST
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