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Preparation method and application of porous geological polymer microspheres

A technology of geopolymers and microspheres, applied in applications, alkali metal compounds, other household appliances, etc., can solve the problems of cumbersome preparation process and high cost

Active Publication Date: 2018-05-01
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the preparation of porous inorganic microspheres at home and abroad mainly adopts the method of high temperature calcination, the preparation process is cumbersome and the cost is high

Method used

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  • Preparation method and application of porous geological polymer microspheres
  • Preparation method and application of porous geological polymer microspheres
  • Preparation method and application of porous geological polymer microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Slurry preparation: Mix and stir 30g slag and 12g liquid sodium silicate (modulus 2.5) to form a mixed slurry, and then slowly add the uniformly dispersed pore-forming agent aqueous solution (3g calcium carbonate + 5g water) to the mixed slurry Continue to stir in the material, mix evenly, stir at a speed of 500 rpm, and stir for 2 minutes to make the system a uniform slurry;

[0029] (2) Ball forming: drop the homogeneous slurry in step (1) into the hot dimethyl silicone oil dispersed at a high speed, the temperature is 50 degrees Celsius, and the stirring speed is 200 rpm;

[0030] (3) Curing: put the simethicone oil of step (2) and the obtained product together into an oven for curing and curing, the temperature is 60 degrees Celsius, and the curing and curing time is 1 hour;

[0031] (4) Filtration: the simethicone oil of step (3) and the resulting product thereof are subjected to vacuum filtration to obtain geopolymer microspheres;

[0032] (5) Calcination: ca...

Embodiment 2

[0036] (1) Slurry preparation: Mix and stir 20g slag and 8.57g liquid sodium silicate (modulus 1.5) to form a mixed slurry, and then slowly add the uniformly dispersed pore-forming agent aqueous solution (10g calcium carbonate + 10g water) to mix Continue to stir in the slurry, mix evenly, the stirring speed is 1000 rpm, and stir for 1 minute, so that the system becomes a uniform slurry;

[0037] (2) Ball forming: drop the homogeneous slurry in step (1) into the hot dimethyl silicone oil dispersed at a high speed, the temperature is 100 degrees Celsius, and the stirring speed is 500 rpm;

[0038] (3) Curing: Put the simethicone oil of step (2) and the obtained product together into an oven for curing and curing, the temperature is 70 degrees Celsius, and the curing and curing time is 12 hours;

[0039] (4) Filtration: carry out vacuum filtration to the simethicone oil of step (3) and the product thereof, to obtain geopolymer microspheres;

[0040] (5) Calcination: calcining t...

Embodiment 3

[0044] (1) Slurry preparation: 20g metakaolin, 10g slag and 12g sodium hydroxide solution (concentration 10 moles) were mixed and stirred evenly to form a mixed slurry, and then the uniformly dispersed pore-forming agent aqueous solution (2g polymethyl methacrylate +25g water) slowly added to the mixed slurry and continued to stir, mixed evenly, the stirring speed was 300 rpm, and stirred for 5 minutes to make the system a uniform slurry;

[0045] (2) Ball forming: drop the homogeneous slurry in step (1) into the hot simethicone oil dispersed at a high speed, the temperature is 90 degrees Celsius, and the stirring speed is 700 rpm;

[0046] (3) Curing: put the simethicone oil of step (2) and the obtained product together into an oven for curing and curing, the temperature is 90 degrees Celsius, and the curing and curing time is 1 hour;

[0047] (4) Filtration: the simethicone oil of step (3) and the resulting product thereof are subjected to vacuum filtration to obtain geopolyme...

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Abstract

The invention discloses a preparation method of porous geological polymer microspheres. The porous geological polymer microspheres are prepared by a dispersion suspension solidification method. Compared with the prior art, low-temperature curing and one-shot molding granulation are realized without requirements of high-temperature calcination and curing and addition of other auxiliaries; and at the same time, large-scale use of solid wastes is realized, and raw materials are widely available, cost is low, process is simple, and the whole process is non-toxic and pollution-free; in addition, the preparation efficiency is high with a ball-forming degree exceeding 90%; the size of the particles can be adjusted, and the pore size distribution is uniform; the pore volume is large, and can be regulated, and a specific surface area of the microspheres reaches 110m2 / g, thus, the porous geological polymer microspheres can be directly used for packed columns for column separation. Experiments show that the porous geological polymer microspheres have a good adsorption effect on heavy metals, and can be used as adsorbents for heavy metals, and have a broad application prospect in the aspect ofremoving heavy metals and radioactive elements in water.

Description

technical field [0001] The invention belongs to the technical field of adsorbent carriers, and in particular relates to a preparation method and application of porous geological polymer microspheres. Background technique [0002] Column separation method is an effective method to remove heavy metals and radioactive elements in water. Some adsorption materials, such as zeolite molecular sieves and activated carbon, can be directly packed into columns, but for organic solvents or inorganic adsorption materials with small particle sizes, they need to be loaded It can only be used on a spherical particle carrier with an appropriate particle size. At present, silica gel, polymer-based composite materials and macroporous silicon-based materials have been developed and utilized, which has improved the scope of use of column separation methods. However, its complex production process and high cost limit its industrial application. [0003] Geopolymers are a kind of raw materials c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/02C04B38/06B01J20/02B01J20/28C02F1/28C02F101/20
CPCB01J20/02B01J20/28021C02F1/281C02F2101/006C02F2101/20C04B28/006C04B2111/00017C04B12/04C04B18/141C04B14/28C04B22/002C04B38/02C04B14/106C04B22/062C04B24/2641C04B38/067
Inventor 王开拓崔学民韦悦周
Owner GUANGXI UNIV
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