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Load type fluorine removal agent and preparation method thereof

A defluorinating agent and supported technology, applied in the field of supported defluorinating agent and its preparation, can solve the problems of low adsorption capacity of defluorinating adsorbent, inability to be directly industrialized application, elapse, etc., and achieve good adsorption effect and defluorination efficiency. High, low-cost effects

Inactive Publication Date: 2017-10-17
JIANGSU HELPER FUNCTIONAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a load-type defluorinating agent and its preparation method, which solves the problem that high-activity inorganic hydrotalcite materials cannot be directly applied industrially due to problems such as pressure drop and flow, and the adsorption of fluorine-removing adsorbents in the prior art Low volume and other issues

Method used

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  • Load type fluorine removal agent and preparation method thereof

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Effect test

Embodiment 1

[0028] A kind of loading type defluorination agent of this embodiment comprises yellow sand, and the inorganic defluorination agent deposited on the surface of yellow sand, the mass ratio of inorganic defluorination agent and yellow sand is 4:1, and inorganic defluorination agent has layered Crystal structure.

[0029] A kind of preparation method of above-mentioned supported type defluorinating agent, comprises the following steps:

[0030] Step 1) Solution preparation:

[0031] Prepare a 0.4mol / L saline solution and prepare a 2mol / L sodium hydroxide aqueous solution; wherein the saline solution is specifically an aqueous solution of magnesium chloride and aluminum chloride;

[0032] Step 2) yellow sand pretreatment:

[0033] Pass the raw material yellow sand through a 60-mesh sieve, take the yellow sand under the sieve, wash and dry it with deionized water;

[0034] Step 3) Response:

[0035] Add deionized water in the yellow sand that step 2) obtains, and the mass ratio...

Embodiment 2

[0039] A load-type defluorination agent of this embodiment includes yellow sand, and an inorganic defluorination agent deposited on the surface of the yellow sand. The mass ratio of the inorganic defluorination agent to the yellow sand is 2:1, and the inorganic defluorination agent has a layered Crystal structure.

[0040] A kind of preparation method of above-mentioned supported type defluorinating agent, comprises the following steps:

[0041] Step 1) Solution preparation:

[0042] Prepare a 1.5mol / L saline solution and prepare a 3mol / L sodium hydroxide aqueous solution; wherein the saline solution is specifically an aqueous solution of nickel nitrate and aluminum nitrate;

[0043] Step 2) yellow sand pretreatment:

[0044] Pass the raw material yellow sand through a 80-mesh sieve, take the yellow sand under the sieve, wash and dry it with deionized water;

[0045] Step 3) Response:

[0046] Add deionized water in the yellow sand that step 2) obtains, and the mass ratio ...

Embodiment 3

[0050] A load-type defluorination agent of this embodiment includes yellow sand, and an inorganic defluorination agent deposited on the surface of the yellow sand. The mass ratio of the inorganic defluorination agent to the yellow sand is 1:1, and the inorganic defluorination agent has a layered Crystal structure.

[0051] A kind of preparation method of above-mentioned supported type defluorinating agent, comprises the following steps:

[0052] Step 1) Solution preparation:

[0053] Prepare a 1mol / L saline solution, and prepare a 2mol / L aqueous solution of a mixture of sodium hydroxide and sodium carbonate; wherein the saline solution is specifically an aqueous solution of magnesium chloride and ferric chloride;

[0054] Step 2) yellow sand pretreatment:

[0055] Pass the raw material yellow sand through a 80-mesh sieve, take the yellow sand under the sieve, wash and dry it with deionized water;

[0056] Step 3) Response:

[0057]Add deionized water in the yellow sand tha...

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Abstract

The invention discloses a load type fluorine removal agent which comprises yellow sand and an inorganic fluorine removal agent depositing on the surface of yellow sand. The mass ratio of the inorganic fluorine removal agent to the yellow sand is 4: 1 to 1: 1. The load type fluorine removal agent disclosed by the invention is suitable for an industrial fixed bed. By taking the yellow sand as a loading carrier, the load type fluorine removal agent is stable in performance, large in adsorption and high in fluorine removal efficiency. The fluorine removal agent disclosed by the invention can be regenerated in situ and can be repeatedly used, and still has a good adsorption effect after regeneration for many times. The load type fluorine removal agent disclosed by the invention is wide in source of raw materials which are easily available, and is low in cost. The preparation equipment and processing course of the load type fluorine removal agent are simple, the reaction condition is wild and the load type fluorine removal agent is suitable for industrial batch production.

Description

technical field [0001] The invention relates to the technical field of fluorine removal materials, in particular to a loaded fluorine removal agent and a preparation method thereof. Background technique [0002] my country's high-fluoride groundwater is widely distributed throughout 27 provinces and municipal autonomous regions, especially in North China and Northwest China. Long-term drinking of water with excessive fluoride may lead to diseases such as dental fluorosis, bone fluorosis, and senile dementia. The World Health Organization recommends that the concentration of fluoride in drinking water not exceed 1.5mg / L, and the current drinking water standard in my country stipulates that fluoride does not exceed 1.0mg / L. Therefore, people have developed a variety of methods to remove fluoride in water. [0003] At present, the main defluorination methods include precipitation, electrochemical, membrane separation, ion exchange, and adsorption. The adsorption method has th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28
CPCB01J20/041B01J20/06B01J20/08B01J20/103C02F1/281
Inventor 蔡建国石洪雁付晓微
Owner JIANGSU HELPER FUNCTIONAL MATERIALS
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