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Preparation method of porous adsorbent

A technology of porous adsorbent and co-surfactant, which is applied in the field of preparation of porous adsorbent, can solve problems such as waste, and achieve the effect of simple source of raw materials

Inactive Publication Date: 2013-02-06
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the organic hydrotalcite is adsorbed and saturated, it generally needs to be landfilled or incinerated. The treated organic hydrotalcite is useless and is a waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add waste organic hydrotalcite used for wastewater treatment into water to prepare a suspension with a solid-to-liquid ratio of 1:10, add ethyl silicate as dodecylamine, and discard organic hydrotalcite with dodecylamine and ethyl silicate The esters were mixed at a mass ratio of 1: 1: 80, stirred and reacted at 60°C for 8 h; after the reaction was completed, the Buchner funnel was filtered, and the solid part was placed at room temperature for 24 h, and finally calcined at 550°C for 6 h.

[0015] After analysis of the product obtained, the specific surface area is 482 m 2 / g, the pore volume is 0.36 cm 3 / g, the average pore diameter is 24 nm, and the saturated adsorption capacity for benzene is 0.34g / g (at 25°C, the relative pressure of benzene at adsorption equilibrium is 0.5).

Embodiment 2

[0017] The waste organic hydrotalcite used for wastewater treatment is added to water to prepare a suspension, the solid-to-liquid ratio is 1:30, ethyl silicate is added as dodecylamine, and the waste organic hydrotalcite is mixed with dodecylamine and ethyl silicate The esters were mixed at a mass ratio of 1: 2: 120, stirred and reacted at 50°C for 4 h; after the reaction was completed, the Buchner funnel was filtered, and the solid part was placed at room temperature for 12 h, and finally calcined at 450°C for 8 h.

[0018] After analysis of the product obtained, the specific surface area is 502 m 2 / g, the pore volume is 0.34 cm 3 / g, with an average pore size of 27 nm, for CO 2 The saturated adsorption capacity is 0.28g / g (at 25°C, CO at adsorption equilibrium 2 relative pressure 0.5).

Embodiment 3

[0020] Add waste organic hydrotalcite used for wastewater treatment into water to prepare a suspension with a solid-to-liquid ratio of 1:20, add ethyl silicate as dodecylamine, and discard organic hydrotalcite with dodecylamine and ethyl silicate The esters were mixed at a mass ratio of 1:2:100, stirred and reacted at 55°C for 6 h; after the reaction was completed, the Buchner funnel was filtered, and the solid part was placed at room temperature for 18 h, and finally calcined at 500°C for 7 h.

[0021] After analysis of the obtained product, the specific surface area is 495 m 2 / g, the pore volume is 0.35 cm 3 / g, the average pore diameter is 25 nm, and the saturated adsorption capacity for toluene is 0.49g / g (at 25°C, the relative pressure of toluene at adsorption equilibrium is 0.5).

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PUM

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Abstract

The invention discloses a preparation method of a porous adsorbent. The preparation method comprises the following steps of: adding waste organic hydrotalcite produced in wastewater treatment to water to obtain turbid liquid, wherein the solid-to-liquid ratio is 1: 10 to 1: 30; adding ethyl silicate as the inorganic neutral precursor, and adding lauryl amine as the cosurfactant, wherein the mass ratio of the organic hydrotalcite to the lauryl amine to the ethyl silicate is 1: (1 to 2): (80 to 120); agitating to react for 4 to 8 hours at the temperature within 50 to 60 DEG C; filtering through a Buchner funnel after the reaction; standing the solid part for 12 to 24 hours at room temperature; and then roasting for 6 to 8 hours at the temperature within 450 to 550 DEG C, so as to obtain the product. According to the preparation method, the surface active agent and the pollutant in the waste organic hydrotalcite are adopted as the templates, the ethyl silicate serving as the inorganic precursor is introduced to the layers, so that the neutral amine and the surface active agent ions form a mixed stick-shaped micelle, and monox hydrate surrounds the micelle; the mixed stick-shaped micelle is roasted to remove the organic part, so as to obtain a porous solid material; and the preparation process is simple.

Description

technical field [0001] The invention relates to a preparation method of a porous adsorbent, which belongs to the technical field of waste gas treatment in environmental protection. Background technique [0002] An ideal exhaust gas adsorbent should usually have the following points: 1) The adsorption capacity is large enough and the adsorption is reversible, that is, the space for the adsorbate to enter is large; 2) There is no undesirable catalytic activity for the adsorbate to avoid the formation of by-products that affect Organic matter recovery; 3) Since organic waste gas often contains a certain amount of water vapor, the competitive adsorption of water molecules affects the adsorption performance of the adsorbent on organic matter, so the surface of the adsorbent is required to have a certain hydrophobicity to minimize the influence of water on the adsorption effect; 4) Hot air regeneration and high-temperature water vapor regeneration are the most commonly used regene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
Inventor 马建锋李良银李定龙杨彦
Owner CHANGZHOU UNIV