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Gas phase ionic mercury adsorption material and preparation method thereof

A technology of gas-phase ions and adsorption materials, applied in the field of pollutant treatment, can solve the problems of failure to meet emission standards, difficult disposal of adsorption materials, high operating costs, etc., and achieve the effects of fast adsorption speed, low production cost and high removal rate

Inactive Publication Date: 2019-11-29
格丰科技材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are three main forms of mercury in the atmosphere: elemental mercury (Hg 0 ), oxidized mercury (Hg 2+ ) and particulate mercury (Hgp), for the treatment of divalent ionic mercury, the usual method is to convert gaseous divalent mercury into water-soluble divalent mercury, and then remove liquid mercury through water treatment equipment, but this method invests Large size, low treatment efficiency, high operating cost, etc. In addition, activated carbon, zeolite powder and other adsorption materials are also used to adsorb gas phase ion mercury, but because of the adsorption materials, it is easy to desorb, causing secondary pollution, and the adsorption capacity is too low to reach Disadvantages such as emission standards, adsorption materials that are difficult to handle after adsorption saturation, and the need for large-scale processing equipment lead to large investment, etc., also limit the wide and effective use of these technologies in the field of gaseous ion mercury treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a gas-phase ionic mercury adsorption material, comprising the following steps:

[0028] 1) Grinding and crushing of raw materials: Mix and grind the following raw materials in parts by weight and grind them to 325-400 mesh: 40 parts of montmorillonite powder, 40 parts of unexpanded perlite powder, 10 parts of porcelain powder, 8 parts of cerium nitrate, hydroxy 2 parts of propyl methylcellulose;

[0029] 2) Mixing of raw materials: Put the raw materials mixed and ground in step 1) into a mixer, add water accounting for 30% of the total weight of raw materials in step 1) and mix for 20 minutes to prepare mud;

[0030] 3) Body molding: Extrude the mud material obtained in step 2), and cut it into a length of 3-5mm;

[0031] 4) Drying of the green body: drying the green body prepared in step 3) at a temperature of 120° C. until the weight percentage of water is lower than 2.6%;

[0032] 5) Firing the green body: firing the dried green body in step ...

Embodiment 2

[0038] A method for preparing a gas-phase ionic mercury adsorption material, comprising the following steps:

[0039] 1) Grinding and crushing of raw materials: Mix and grind the following raw materials in parts by weight and grind them to 325-400 mesh: 40 parts of montmorillonite powder, 44 parts of unexpanded perlite powder, 10 parts of porcelain powder, 1 part of cerium nitrate, hydroxy 5 parts of propyl methylcellulose;

[0040] 2) Mixing of raw materials: Put the mixed and ground raw materials in step 1) into a mixer, add water accounting for 20% of the total weight of raw materials in step 1) and mix for 15 minutes to prepare mud;

[0041] 3) Body molding: Extrude the mud material obtained in step 2), and cut it into a length of 3-5mm;

[0042] 4) Drying of the green body: drying the green body prepared in step 3) at a temperature of 80° C. until the weight percentage of water is lower than 2.6%;

[0043] 5) Green body firing: the dried green body in step 4) is fired a...

Embodiment 3

[0049] A method for preparing a gas-phase ionic mercury adsorption material, comprising the following steps:

[0050] 1) Grinding and crushing of raw materials: Mix and grind the following raw materials in parts by weight and grind them to 325-400 mesh: 39 parts of montmorillonite powder, 38 parts of unexpanded perlite powder, 12 parts of porcelain powder, 8 parts of cerium nitrate, hydroxy 3 parts of propyl methylcellulose;

[0051] 2) Mixing of raw materials: Put the mixed and ground raw materials in step 1) into a mixer, add water accounting for 23% of the total weight of raw materials in step 1) and mix for 17 minutes to prepare mud;

[0052] 3) Body molding: Extrude the mud material obtained in step 2), and cut it into a length of 3-5mm;

[0053] 4) Drying of the green body: drying the green body prepared in step 3) at a temperature of 86°C until the weight percentage of water is lower than 2.6%;

[0054] 5) Firing the green body: roast the dried green body in step 4) a...

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Abstract

The invention provides a gas phase ionic mercury adsorption material and a preparation method thereof. The material is prepared by taking 35-45 parts of montmorillonite powder, 30-40 parts of unexpanded perlite powder, 10-15 parts of porcelain powder, 5-10 parts of cerium nitrate and 2-5 parts of hydroxypropyl methylcellulose as raw materials and performing crushing, grinding, mixing, extrusion molding, drying, roasting and nitric acid modification. Compared with the prior art, the gas-phase ionic mercury adsorption material has the advantages of fast adsorption speed for the gas-phase ionic mercury, high adsorption capacity, high removal rate, high specific surface area, high mechanical strength, low use cost, easiness in regeneration and reusability, capability of converting and recycling polluted mercury into mercury with use value, no secondary pollution in use, suitability for treating gas polluted by the gas-phase ionic mercury, wide source of raw materials, easiness in production and low production cost.

Description

technical field [0001] The invention belongs to the field of pollutant treatment, and in particular relates to a gas-phase ionic mercury adsorption material and a preparation method thereof. Background technique [0002] Mercury is not only not a necessary substance for the human body in life activities, but also a heavy metal pollutant with severe physiological and neurotoxicity to the human body. Its toxicity to the human body has the characteristics of long-term, cumulative, and irreversible. [0003] At present, mercury mainly enters the ecological chain through air and water, and thus enters the human body. With the development of modern industry, mercury-containing waste water and mercury-containing waste gas are discharged directly without treatment, resulting in a large amount of soil, water, air, and biological pollution. It is contaminated by mercury and eventually enters the human body. Since gaseous mercury can directly enter the human body through the air, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01D53/02B01J20/30
CPCB01J20/12B01J20/106B01J20/06B01D53/02B01D2257/602
Inventor 吴黄河奉向东邱根萍龚梅玲郭进进叶斌
Owner 格丰科技材料有限公司
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