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High efficiency adsorbent regeneration method

An adsorbent and high-efficiency technology, which is applied in the field of regeneration of high-efficiency adsorbents, can solve the problems of high cost, and achieve the effects of low cost, simple process, and low adsorption capacity decay rate

Inactive Publication Date: 2019-08-23
彭万喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most representative adsorbent is activated carbon, which has quite good adsorption performance, but the cost is relatively high. It was once used in the Songhua River incident to adsorb toluene in water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A regeneration method for high-efficiency adsorbents. Add the used adsorbents to a mixed solution of sodium chloride and sodium nitrate, stir and soak for 1.5 hours at a temperature of 112°C, then take them out and drain them, and then add the washed materials to The mixed solution of sodium hydroxide and EDTA was mixed and stirred for 1.3 hours at a temperature of 85°C, then taken out and drained, then added hydrochloric acid solution, reacted at a temperature of 62°C for 45 minutes, then taken out and drained, washed twice with water, Put it into a microwave dryer and microwave dry to constant weight to obtain the regenerated adsorbent.

[0030] The concentration of sodium chloride in the mixed solution of described sodium chloride and sodium nitrate is 5.2mol / L, and the concentration of sodium nitrate is 0.65mol / L, and the pH of mixed solution is 3.21, and the adsorption agent and sodium chloride and sodium nitrate The mass ratio of the mixed solution is 1:4.2.

[0...

Embodiment 2

[0039] A high-efficiency adsorbent regeneration method, the used adsorbent is first added to a mixed solution of sodium chloride and sodium nitrate, stirred and soaked at a temperature of 117 ° C for 1.8 hours, then taken out and drained, and then the washed material is added The mixed solution of sodium hydroxide and EDTA was mixed and stirred for 1.8 hours at a temperature of 87°C, then taken out and drained, then added hydrochloric acid solution, reacted at a temperature of 62°C for 45min, then taken out and drained, washed twice with water, Put it into a microwave dryer and microwave dry to constant weight to obtain the regenerated adsorbent.

[0040] The concentration of sodium chloride in the mixed solution of described sodium chloride and sodium nitrate is 5.5mol / L, and the concentration of sodium nitrate is 0.75mol / L, and the pH of mixed solution is 3.12, and the adsorption agent and sodium chloride and sodium nitrate The mass ratio of the mixed solution is 1:3.8.

[...

Embodiment 3

[0049] A high-efficiency adsorbent regeneration method, the used adsorbent is first added to a mixed solution of sodium chloride and sodium nitrate, stirred and soaked at a temperature of 117°C for 1.3 hours, then taken out and drained, and then the washed material is added to The mixed solution of sodium hydroxide and EDTA was mixed and stirred for 1.5 hours at a temperature of 85°C, then taken out and drained, then added hydrochloric acid solution, reacted at a temperature of 58°C for 38 minutes, then taken out and drained, washed twice with water, Put it into a microwave dryer and microwave dry to constant weight to obtain the regenerated adsorbent.

[0050] The concentration of sodium chloride in the mixed solution of described sodium chloride and sodium nitrate is 5.8mol / L, and the concentration of sodium nitrate is 0.75mol / L, and the pH of mixed solution is 2.75, and the adsorption agent and sodium chloride and sodium nitrate The mass ratio of the mixed solution is 1:4. ...

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Abstract

The invention discloses a high efficiency adsorbent regeneration method. After adsorption, an adsorbent is added into a mixed solution of sodium chloride and sodium nitrate for stirring immersion for1 to 2h at 110 to 120 DEG C, then is taken out from the mixed solution for draining, after washing, the adsorbent is added into a mixed solution of sodium hydroxide and EDTA, is subjected to mixing stirring for 1 to 2h at 80 to 90 DEG C, is taken out from the mixed solution for draining, is added into a hydrochloric acid solution for 30 to 60min of reaction at 50 to 65 DEG C, is taken out from thehydrochloric acid solution for draining, is washed with clear water for two times, is introduced into a microwave drier for microwave drying until the weight is constant so as to obtain the regenerated adsorbent. The high efficiency adsorbent regeneration method is wide in application range, and possesses excellent adsorption treatment effect on heavy metal, ammonia nitrogen, and phosphorous.

Description

technical field [0001] The invention relates to a regeneration method of a high-efficiency adsorbent, which belongs to the technical field of environmental protection. Background technique [0002] Adsorbents are solid substances that are effective in absorbing certain components from a gas or liquid. Adsorbents generally have the following characteristics: large specific surface, suitable pore structure and surface structure, strong adsorption capacity for adsorbate, generally do not chemically react with adsorbate and medium; easy to manufacture, easy to regenerate, and have good mechanical properties. strength etc. Adsorbents can be classified according to pore size, particle shape, chemical composition, surface polarity, etc., such as coarse-pore and fine-pore adsorbents, powdery, granular, strip-shaped adsorbents, carbonaceous and oxide adsorbents, polar and non-polar polar adsorbents, etc. [0003] Commonly used adsorbents include various activated carbon adsorbents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34
CPCB01J20/3441B01J20/3475
Inventor 彭万喜葛省波邓和平
Owner 彭万喜
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