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Selective ammonium ion sieve and preparation method and application thereof

An ammonium ion, selective technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of low adsorption capacity, poor selectivity, poor cycle, etc., to achieve stable material structure, High selectivity, beneficial to environmental protection

Inactive Publication Date: 2019-02-19
TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-selectivity ammonium ion sieve and its preparation method and application in order to overcome the disadvantages of low adsorption capacity, poor selectivity, poor cycle performance and short life of the deamination materials in the prior art.

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  • Selective ammonium ion sieve and preparation method and application thereof
  • Selective ammonium ion sieve and preparation method and application thereof
  • Selective ammonium ion sieve and preparation method and application thereof

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preparation example Construction

[0025] The invention provides a kind of preparation method of selective ammonium ion sieve, comprises the following steps:

[0026] (1) Sodium ferrocyanide or potassium ferrocyanide and transition metal salt are mixed with accepting liquid respectively to prepare corresponding sodium ferrocyanide or potassium ferrocyanide solution and transition metal salt solution, sodium salt or potassium Salt and deionized water are prepared into sodium salt or potassium salt solution;

[0027] (2) Under stirring conditions, add sodium ferrocyanide or potassium ferrocyanide solution and transition metal salt solution dropwise to sodium salt or potassium salt solution at the same time, and age to control the crystal shape to be spherical or cubic , then separated and washed;

[0028] (3) The cleaned material is dried to obtain powdered selective ammonium ion sieve A 2 m 3 [Fe(CN) 6 ] 2 , wherein, A is Na or K element, and M is a transition metal element.

[0029] The invention adopts t...

Embodiment 1

[0058] (1) Weigh 1mol sodium ferrocyanide, 1mol zinc sulfate and 1mol sodium chloride and add them to 1L deionized water respectively to prepare 1mol / L sodium ferrocyanide solution, 1mol / L zinc sulfate solution and 1mol / L of sodium chloride solution;

[0059] (2) Under the rotating speed of 500rpm, the sodium ferrocyanide solution of 1mol / L and the zinc sulfate solution of 1mol / L are added dropwise in the sodium chloride solution containing 1mol / L in 100mL simultaneously according to the speed of 50ml / min, After the dropwise addition, continue mixing and stirring for 3 hours to obtain a white turbid liquid, then age for 2 hours, and wash 5 times after centrifugation to obtain a selective ammonium ion sieve Na 2 Zn 3 [Fe(CN) 6 ] 2 Material;

[0060] (3) Selective ammonium ion sieve Na 2 Zn 3 [Fe(CN) 6 ] 2 The material was placed in a vacuum drying oven and dried at 100° C. for 3 hours to obtain a dry powdery selective ammonium ion sieve, which was ready to use, and the...

Embodiment 2

[0062] (1) Weigh 1mol sodium ferrocyanide, 2mol copper sulfate and 2mol sodium chloride and add them to 1L deionized water respectively to prepare 1mol / L sodium ferrocyanide solution, 2mol / L copper sulfate solution and 2mol / L of sodium chloride solution;

[0063] (2) Under the rotating speed of 500rpm, the sodium ferrocyanide solution of 1mol / L and the copper sulfate solution of 2mol / L are added dropwise in the sodium chloride solution containing 2mol / L in 100mL simultaneously according to the speed of 50ml / min, After the dropwise addition, continue mixing and stirring for 2 hours to obtain a white turbid liquid, then age for 5 hours, and wash 6 times after centrifugation to obtain a selective ammonium ion sieve Na 2 Cu 3 [Fe(CN) 6 ] 2 Material;

[0064] (3) Selective ammonium ion sieve Na 2 Cu 3 [Fe(CN) 6 ] 2 The material was placed in a vacuum drying oven and dried at 90° C. for 3.5 hours to obtain a dry powdery selective ammonium ion sieve, which was ready to use, ...

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Abstract

The invention relates to the field of ammonia nitrogen adsorption materials, and discloses a selective ammonium ion sieve and a preparation method and application thereof. The preparation method of the selective ammonium ion sieve comprises the following steps of: (1) preparing sodium ferrocyanide or potassium ferricyanide and transition metal salts with a receiving solution respectively to form acorresponding sodium ferricyanide or potassium ferricyanide solution and transition metal salt solution, preparing sodium salts or potassium salts with deionized water into a sodium salt or potassiumsalt aqueous solution; (2) under a stirring condition, dropping the sodium ferricyanide or potassium ferricyanide solution and the transition metal salt solution to the sodium salt or potassium saltsolution at the same time, and maturing, controlling the crystal shape to be spherical or cubic, then separating and cleaning; (3) drying the cleaned material to obtain powder selective ammonium ion sieve A2M3 [Fe (CN) 6]. The selective ammonium ion sieve has the advantages of high adsorption capacity, high selectivity, good circulation and long life.

Description

technical field [0001] The invention relates to an ammonia nitrogen adsorption material, in particular to a selective ammonium ion sieve and its preparation method and application. Background technique [0002] Ammonia nitrogen in water mainly exists in the form of positively charged ammonium ions, and the content of ammonia nitrogen in water is an important indicator for evaluating the degree of water pollution. According to the national surface water environmental quality standard (GB3838-2002), the concentration of ammonia nitrogen (calculated as N) in surface III water is ≤1ppm. For this concentration limit, cation exchange materials can be used to exchange and remove ammonia nitrogen in water. , the method has the characteristics of stable water production index and simple process. [0003] At present, cation exchange materials used for deammonization of medium and low concentration ammonia nitrogen water include zeolite, modified molecular sieve, modified cation excha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/30C02F1/28C02F101/16
CPCB01J20/0229B01J20/0244B01J20/04C02F1/281C02F2101/16
Inventor 陈亦力杨志涛莫恒亮李锁定代攀孟晓冬张国军高士强许鑫
Owner TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD