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Method for preparing deaminating adsorbent

An adsorbent and ammonium removal technology, which is applied in the direction of solid adsorbent liquid separation, separation methods, chemical instruments and methods, etc., can solve the problems of no modification, no consideration of the influence of adsorption effect, and inconspicuous adsorption effect, etc., to achieve adsorption Effect of Capacity Improvement

Active Publication Date: 2005-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN86106921A takes natural clinoptilolite or mordenite as the main raw material, adds a certain amount of aluminum hydroxide, potassium chloride, sodium hydroxide and water to mix, and then performs complex and long-term gelation, crystallization and other steps to synthesize a Adsorbent, which can be used to adsorb potassium ions or ammonium ions in water, and its preparation process is relatively complicated
US4,522,727 discloses a treatment method for treating fish farming wastewater with L-type synthetic zeolite and T-type zeolite, which reduces the concentration of non-ionic ammonia in fish ponds, and the NH 4 + The adsorption effect of -N is not obvious
US4,717,483 is based on activated alumina, combined with Y-type zeolite to make an adsorbent to adsorb molecular ammonia, sulfide and organic matter in tannery wastewater, without considering the effect of NH 4 + Influence of -N adsorption effect
In the prior art, there are many modification methods for Y-type molecular sieves, such as acid treatment, hydrothermal treatment, etc., but mainly for the modification of Y zeolite used as a catalyst, not for modification as an adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of the adsorbent:

[0020] (1) Be the natural NaY molecular sieve of 2 with Si / Al atomic ratio as main raw material, mix with SB powder, field green powder, citric acid and nitric acid in following weight ratio: 70:12:5:8:5.

[0021] (2) Forming. Thin strips with a diameter of 1 mm and an average length of 1.5 cm are made by an extruder.

[0022] (3) Roasting. At 350°C, bake for 8 hours.

[0023] Adsorption effect:

[0024] Put the adsorbent prepared by the above process into the ion exchange column, the effective volume of the column is 18 liters, the ion exchange column is equipped with 12kg of adsorbent, the treated water volume is 50L / h, the regeneration cycle is 16h, and the space velocity is 2.7h -1 . Use 15% sodium carbonate solution for regeneration. Influent ammonia nitrogen concentration 2905mg / L, dynamic ammonia nitrogen exchange capacity 34.17mgNH 4 + -N / g. The influent calcium ion concentration is 38mg / L, the effluent average concentrat...

Embodiment 2

[0026] Preparation of the adsorbent:

[0027] (1) Be that the natural NaY molecular sieve of 3 is the main raw material with Si / Al atomic ratio, mix with aluminum hydroxide dry rubber powder, field green powder, tartaric acid and hydrochloric acid produced by aluminum chloride method by following weight ratio: 75: 10 :3:4:8.

[0028] (2) Forming. Thin strips with a diameter of 1 mm and an average length of 1.5 cm are made by an extruder.

[0029] (3) Roasting. At 400°C, bake for 6 hours.

[0030] Adsorption effect:

[0031] Other conditions are the same as in Example 1, the concentration of ammonia nitrogen in the influent is raised to 3874mg / L, the concentration of calcium ions to 70mg / L, the concentration of magnesium ions to 30mg / L, and the concentration is 20% sodium carbonate solution for regeneration. The treated water volume and air velocity remain unchanged. The regeneration period is 16h. Dynamic ammonia nitrogen exchange capacity 33.66mgNH 4+ -N / g. The avera...

Embodiment 3

[0033] Preparation of the adsorbent:

[0034] (1) The natural NaY molecular sieve with the Si / Al atomic ratio of 3 is the main raw material, and the aluminum hydroxide dry rubber powder produced by the carbon dioxide method, Tianqing powder, acetic acid and citric acid 1: 1 mixture and nitric acid are mixed in the following weight ratio Uniform: 65:15:4:8:8.

[0035] (2) Forming. Thin strips with a diameter of 1 mm and an average length of 1.5 cm are made by an extruder.

[0036] (3) Roasting. At 450°C, bake for 4 hours.

[0037] Adsorption effect:

[0038] The ammonia nitrogen concentration in the influent is 4855mg / L, the calcium is 40mg / L, the magnesium is 25mg / L, the processing capacity is 20L / h, and the corresponding space velocity is 1.1h -1 , When the regeneration cycle is 24h. Use 18% sodium carbonate solution for regeneration. The regeneration period is 16h. Dynamic ammonia nitrogen exchange capacity 38.16mgNH 4 + -N / g. The average concentration of calcium ...

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PUM

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Abstract

The present invention relates to a preparation method of adsorbing agent capable of simultaneously removing ammonia nitrogen, calcium ion and magnesium ion in the waste water. Said invention uses NaY molecular sieve as main raw material, after said main raw material is mixed with aluminum hydroxide dried gel powder, sesbania powder, organic acid and inorganic acid uniformly, the above-mentioned mixture can be undergone the processes of forming and roasting so as to obtain the invented absorbing agent. As compared with general NaY molecular sieve said invented adsorbing agent can greatly raise its capacity for adsorbing ammonium ion, at the same time can remove the calcium ion and magnesium ion in the treated water, and the outlet water also can be used as supplementary water of circulation cooling water.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent, in particular to a preparation method of an adsorbent capable of simultaneously adsorbing ammonia nitrogen, calcium ions and magnesium ions. Background technique [0002] Nitrogen is one of the main pollutants in wastewater. The main forms of nitrogen are: NH 3 , NH 4 + , NO 2 , NO 3 , organic nitrogen, NH in petrochemical wastewater 4 + Nitrogen in the form of nitrogen is the main and most common pollutant. Nitrogen in the water makes the water eutrophic, which breeds bacteria and algae. [0003] Adsorption is an effective method in wastewater advanced treatment technology. Adsorbents in the prior art include: activated carbon, activated coal, clay, diatomaceous earth, bentonite, montmorillonite, clay, zeolite, resin, slag, wood chips, coal, etc. Ash, humic acid, etc. The properties of various adsorbents are not the same, and activated carbon is currently the most commonly used ad...

Claims

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Application Information

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IPC IPC(8): B01D15/00B01J20/18C02F1/28
Inventor 李勇韩建华王俊英
Owner CHINA PETROLEUM & CHEM CORP
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