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Ammonium ion sieve, its preparation method and application

An ammonium ion, ion sieve technology, applied in inorganic cation exchangers, ion-exchanged water/sewage treatment, crystalline aluminosilicate zeolite, etc., can solve the problems of complex process, high cost, low efficiency, etc., and achieve the preparation method. Simple and easy effects

Inactive Publication Date: 2006-08-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this method is: its exchange adsorption capacity is small, and the saturated adsorption capacity is less than 8mg NH 4 + _N / g zeolite, very low efficiency
The molecular sieve method process is complicated and the cost is high

Method used

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  • Ammonium ion sieve, its preparation method and application
  • Ammonium ion sieve, its preparation method and application
  • Ammonium ion sieve, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The original kaolin soil was crushed, ground, and sieved to 200 mesh for later use. The sieved kaolin was pretreated at 300°C for 2 hours to be activated, and the activated kaolin was mixed with NaOH and distilled water at a mass ratio of 4:1:5, put into a muffle furnace and heated at 300°C for 2.5 hours, and taken out After cooling, soak and wash with distilled water several times, the pH value of the solid surface is 8, dry at 75°C for 2 hours, and pulverize to obtain a light yellow high-performance ammonium ion sieve powder with an ammonium ion exchange capacity of 61.2mg NH 4 + _N / g ion sieve.

Embodiment 2

[0031] The original kaolin soil was crushed, ground, and sieved to 100 mesh for later use. The sieved kaolin is pretreated at 150°C for 5 hours to be activated, the activated kaolin is mixed with NaOH and distilled water at a ratio of 1:1:1.25, put into a muffle furnace and heated at 500°C for 10 hours, take out and cool After soaking and washing with distilled water for many times, the pH value of the solid surface is 9, drying at 80°C for 4 hours, and pulverizing to obtain a light yellow high-performance ammonium ion sieve powder with an ammonium ion exchange capacity of 65.2mg NH 4 + _N / g ion sieve.

Embodiment 3

[0033] The original kaolin soil was crushed, ground, and sieved to 200 mesh for later use. The sieved kaolin is pretreated at 300°C for 20 hours to be activated, the activated kaolin is mixed with KOH and distilled water at a ratio of 10:1:5, put into a muffle furnace and heated at 300°C for 13 hours, take out and cool After soaking and washing with distilled water for several times, the pH value of the solid surface is 9, drying at 75°C for 2 hours, and pulverizing to obtain a light yellow high-performance ammonium ion sieve powder with an ammonium ion exchange capacity of 60.7mg NH 4 + _N / g ion sieve.

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Abstract

The present invention relates to an ammonium ionic sieve, its preparation method and application. Said ammonium ionic sieve is made up by using kaoline modified by modifying agent and distilled water. Its preparation method includes the following steps: a). pulverizing kaoline raw material, grinding and sieving; b). heating the sieved sample in muffle furnace to obtain activated kaoline; c). uniformly mixing the activated kaoline, modifying agent and water and stirring them; d). heating mixture, drying, cooling and soaking the obtained product in distilled water, washing until the sample surface pH value is less than 10; and e). drying the obtained product in drying oven so as to obtain the invented ammonium ionic sieve.

Description

technical field [0001] The invention relates to an ion sieve and its preparation method and application, in particular to an ammonium ion sieve and its preparation method and application. Background technique [0002] At present, the methods for removing ammonia from sewage mainly include stripping method, break point chlorination method and ion exchange method. The blow-off method is simple and easy to control, but when the ambient temperature is lower than zero degrees Celsius, the ammonia blow-off cannot be carried out. The biggest disadvantage of the ammonia blow-off method is that the ammonia only transfers and does not undergo any transformation, from water pollution to air pollution. , there is secondary pollution. Ammonia stripping is only suitable for the treatment of wastewater with high concentration of ammonia nitrogen. The breakpoint chlorine addition method has a high denitrification rate, rapid and complete reaction, and has a disinfection effect, but the re...

Claims

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Application Information

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IPC IPC(8): B01J39/02C01B39/02C02F1/42
Inventor 黄丽谭欣赵林
Owner TIANJIN UNIV
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