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Method for improving ammonium exchange capacity of natural zeolite ammonium

A natural zeolite and ammonium exchange technology, applied in ion exchange, cation exchange, chemical instruments and methods, etc., can solve the problems of long soaking time, high temperature roasting time, small increase in adsorption capacity, etc., and achieve simple operation and low cost Effect

Inactive Publication Date: 2014-07-23
秦皇岛国丰维景环保科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solution immersion modification can remove some water-soluble residues and inorganic impurities on the surface and inner pores of natural zeolite, and improve the ion exchange capacity and adsorption capacity of zeolite to a certain extent, but there are disadvantages such as long soaking time and small increase in adsorption capacity.
High-temperature roasting can remove some impurities to the greatest extent and improve the adsorption capacity of zeolite, but the high-temperature roasting time is long and the energy consumption is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Sieve the natural zeolite, collect 1g of zeolite with a particle size of 20-40 mesh, wash the zeolite several times with deionized water, put the washed natural zeolite into 0.3mol / L hydrochloric acid solution, and put it on the shaker Shake and soak for 2 hours at a shaking speed of 100rpm. Wash the zeolite soaked by shaking with deionized water. After detecting no chloride ions with 0.1mol / L silver nitrate solution, put it in an electric drying oven and dry it at 80°C. . Put the above-mentioned dried natural zeolite into a microwave oven, and carry out microwave modification on the zeolite. The microwave power is 500W, and the microwave modification time is 3min. Then put the above microwave modified zeolite into a beaker, add 100mL of 1% sodium chloride solution, place the beaker in an ultrasonic generator, and ultrasonically modify the zeolite for 10 minutes. Take out the ultrasonically modified zeolite, wash it repeatedly with deionized water, and then use 0.1mol / ...

Embodiment 2

[0019] Sieve the natural zeolite, collect 1g of zeolite with a particle size of 20-40 mesh, wash the zeolite several times with deionized water, put the washed natural zeolite into 0.1mol / L hydrochloric acid solution, and put it on the shaker Shake and soak for 1 hour at a shaking speed of 100rpm. Wash the zeolite soaked by shaking with deionized water. After detecting no chloride ions with 0.1mol / L silver nitrate solution, put it in an electric drying oven and dry it at 90°C. . Put the dried natural zeolite into a microwave oven, and carry out microwave modification on the zeolite. The microwave power is 450W, and the microwave modification time is 3min. Then put the above microwave modified zeolite into a beaker, add 100mL of 2% sodium chloride solution, place the beaker in an ultrasonic generator, and perform ultrasonic modification on the zeolite. The ultrasonic modification time is 5min. Take out the ultrasonically modified zeolite, wash it repeatedly with deionized wate...

Embodiment 3

[0021] Sieve the natural zeolite, collect 1g of zeolite with a particle size of 20-40 mesh, wash the zeolite several times with deionized water, put the washed natural zeolite into 0.2mol / L hydrochloric acid solution, Shake and soak for 1.5h with a shaking speed of 100rpm. Wash the zeolite soaked in shock with deionized water. After detecting no chloride ions with 0.1mol / L silver nitrate solution, put it in an electric drying oven and dry it at 85°C. Dry. Put the dried natural zeolite into a microwave oven, and carry out microwave modification on the zeolite. The microwave power is 480W, and the microwave modification time is 3min. Then put the zeolite modified by microwave above into a beaker, add 100mL of 1.5% sodium chloride solution, put the beaker in an ultrasonic generator, and perform ultrasonic modification on the zeolite. The ultrasonic modification time is 8 minutes. Take out the ultrasonically modified zeolite, wash it repeatedly with deionized water, and then use ...

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Abstract

The invention discloses a method for improving an ammonium exchange capacity of natural zeolite. The method mainly comprises the following steps of: firstly, washing the zeolite with a grain size of 20-40 meshes for many times by deionized water, soaking the washed zeolite in hydrochloride solution, and drying the soaked zeolite in an electrically heated drying oven; secondly, putting the zeolite into a microwave oven, wherein the power of the microwave oven is 450W-500W, and the microwave modifying time is 3min; thirdly, putting the zeolite into a beaker, adding 1%-2% of sodium chloride solution in the beaker, and putting the beaker in an ultrasonic generator, wherein the ultrasonic modifying time is 5min-10min; and finally, washing the zeolite by the deionized water, and drying the washed zeolite in the electrically heated drying oven at a temperature of 80 DEG C to 90 DEG C after no chloride ions are detected in the zeolite by 0.1mol / L silver nitrate. The method has the advantages of being rapid, efficient, simple to operate and low in cost, the adsorption capacity of the modified zeolite can be improved to 4 mg / g-5mg / g from 1 mg / g-1.5mg / g of the natural zeolite.

Description

technical field [0001] The invention relates to a method for modifying zeolite. Background technique [0002] Natural zeolite is a non-toxic, odorless, aluminosilicate mineral with good cation exchange capacity and adsorption capacity. It is often used as a cation adsorbent with low price. Its cation exchange capacity is often expressed by ammonium exchange capacity. The main component of natural zeolite is a hydrous aluminosilicate crystal with a framework structure and porosity, and the framework is composed of silicon oxide (SiO 4 ) tetrahedron and aluminum oxide (AlO 4 ) Tetrahedral is a one-dimensional chain structure, a two-dimensional sheet structure and a three-dimensional three-dimensional structure formed by interconnecting the oxygen atoms at the vertices. However, the impurity components contained in natural zeolite are relatively complex, and the pores are often blocked by sodium, magnesium, hydrogen, oxygen, etc., and the degree of interconnection is also poo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J39/14B01J20/16
Inventor 贺君屈年瑞王洪超
Owner 秦皇岛国丰维景环保科技开发有限公司