Preparation method of nano-iron modified zeolite

A modified zeolite and nano-iron technology, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of small adsorption capacity, large dosage of high-concentration ammonia nitrogen, increased transportation costs, etc. problem, to achieve the effect of improving the adsorption capacity of ammonia nitrogen, simple preparation process and large adjustable range

Inactive Publication Date: 2013-12-25
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although natural and artificial zeolites are effective in removing ammonia nitrogen, the disadvantage is that the adsorption capacity is small, resulting in a relatively large amount of removal of high-concentration ammonia nitrogen, which increases transportation costs.
However, because powdered zeolite is not easy to separate from water, resulting in powdered zeolite is not easy to recycle

Method used

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  • Preparation method of nano-iron modified zeolite
  • Preparation method of nano-iron modified zeolite
  • Preparation method of nano-iron modified zeolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Disperse 10.2 g of clinoptilolite in 200 mL of 5 mol / L NaOH solution and stir at 90° C. for 5 hours to form a hydrogel. Mix 0.4 g of nano-iron with it, stir evenly, put the material into a reaction kettle lined with polytetrafluoroethylene, and crystallize at 90° C. for 6 hours. Then filter, wash, and dry at 60°C for 24 hours. Through nitrogen adsorption and desorption and infrared spectroscopic analysis, the nano-iron is attached to the micropore wall of the zeolite.

Embodiment 2

[0033] Disperse 12.5 g of artificial zeolite 13X zeolite in 100 mL of 2 mol / L NaOH solution, and stir at 80° C. for 1 hour to form a hydrogel. Then add 0.4 g of nano-iron, stir evenly, put the material into a reaction kettle lined with polytetrafluoroethylene, and crystallize at 90° C. for 8 hours. Then filter, wash, and dry at 60°C for 24 hours. Through nitrogen adsorption and desorption and infrared spectroscopic analysis, the nano-iron is attached to the micropore wall of the zeolite.

Embodiment 3

[0035] Disperse 10.5 g of artificial zeolite 4A zeolite in 100 mL of 2 mol / L NaOH solution and stir at 80° C. for 1 hour to form a hydrogel. Then add 0.4 g of nano-iron, stir evenly, put the material into a reaction kettle lined with polytetrafluoroethylene, and crystallize at 99° C. for 3-4 hours. Then filter, wash, and dry at 60°C for 24 hours. Through nitrogen adsorption and desorption and infrared spectroscopic analysis, the nano-iron is attached to the micropore wall of the zeolite.

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Abstract

The invention relates to a preparation method of nano-iron modified zeolite, which comprises the steps of firstly mixing natural zeolite or artificially synthesized zeolite with an alkali solution so as to obtain hydrogel, or mixing natural zeolite or artificially synthesized zeolite with an alkali solution in a certain proportion through a silicon source and an aluminum source so as to obtain hydrogel; uniformly mixing the hydrogel with nano iron so as to obtain a modified zeolite synthesized material; crystallizing the modified zeolite synthesized material under appropriate conditions so as to obtain a nano-iron modified zeolite product. Compared with the existing zeolite, in the aspect of ammonia nitrogen adsorption, the adsorption capacity of the synthesized modified zeolite is greatly increased. The synthesized modified zeolite also can be applied to the technical field of catalytic cracking, sewage treatment, and the like.

Description

technical field [0001] The invention belongs to the field of nano-material modified microporous zeolite, and in particular relates to a preparation method of nano-iron modified zeolite. Background technique [0002] With the rapid development of agriculture and industry, a large amount of waste water has been produced, which has caused great harm to the natural environment and human body. Agricultural and industrial wastewater nitrogen-rich compounds such as ammonia nitrogen, nitrite and nitrate, etc. Pollutants with high concentrations of nitrogen lead to environmental damage. These nitrogen compounds enter the water environment through different channels and become nutrients for the growth of algae, resulting in a large number of algal blooms and algae blooms. Animal husbandry, urban and agricultural wastewater, and industrial wastewater will increase the concentration of ammonia nitrogen in the water environment. Ammonia-nitrogen wastewater, especially high-concentrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 于水利刘敏敏侯立安
Owner TONGJI UNIV
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