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Preparation method of rare-earth composite alumina balls

A composite technology of alumina balls and rare earths, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of easy loss of powdered adsorbent, high cost and difficult realization, complicated preparation process, etc. problems, to achieve the effect of easy recovery and regeneration, simple and easy preparation method, and good adsorption effect

Inactive Publication Date: 2018-12-25
福建璞睿泰科新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as long preparation process, complex preparation process, high cost and difficult to realize industrialization, low adsorption capacity, poor regeneration, narrow application range, easy loss of powdered adsorbent, etc.

Method used

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  • Preparation method of rare-earth composite alumina balls

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Effect test

Embodiment 1

[0034] A preparation method of rare earth composite alumina balls, comprising the following steps:

[0035] S1. Dissolve 1 kg of lanthanum nitrate in 9 kg of water, then dropwise add ammonia water to adjust the pH value to 8-9, and stir for 0.5 h to obtain a rare earth metal hydroxide slurry;

[0036] S2. Mix 0.5kg rare earth metal hydroxide slurry, 0.8kg phenolic resin and 40kg deionized water, and stir to obtain an atomized slurry;

[0037] S3, sending the sandy alumina and the atomized slurry into the silo of the fluidized bed for granulation to obtain the product;

[0038] S4. The product is baked at a temperature of 800° C. for 10 hours to obtain the desired rare earth composite alumina balls.

Embodiment 2

[0040] A preparation method of rare earth composite alumina balls, comprising the following steps:

[0041] S1. Dissolve 3 kg of cerium nitrate in 7 kg of water, then dropwise add sodium carbonate to adjust the pH value to 8-9, and stir for 2 hours to obtain a rare earth metal hydroxide slurry;

[0042] S2. Mix 0.8kg rare earth metal hydroxide slurry, 1.2kg ethylene polymer glue and 44kg deionized water, and stir to obtain an atomized slurry;

[0043] S3, sending the sandy alumina and the atomized slurry into the silo of the fluidized bed for granulation to obtain the product;

[0044] S4. The product is baked at a temperature of 600° C. for 1 hour to obtain the desired rare earth composite alumina ball.

Embodiment 3

[0046] A preparation method of rare earth composite alumina balls, comprising the following steps:

[0047] S1. Dissolve 1 kg of cerium chloride and 2 kg of lanthanum chloride in 8 kg of water, then dropwise add sodium bicarbonate to adjust the pH value to 8, and stir for 1 hour to obtain a rare earth metal hydroxide slurry;

[0048] S2. Mix 0.6kg rare earth metal hydroxide slurry, 1kg phenolic resin and 42kg deionized water, and stir to obtain an atomized slurry;

[0049] S3, sending the powdery alumina and the atomized slurry into the silo of the fluidized bed for granulation to obtain the product;

[0050] S4. The product is baked at a temperature of 700° C. for 0.5 hours to obtain the desired rare earth composite alumina balls.

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Abstract

The invention discloses a preparation method of rare-earth composite alumina balls. The preparation method includes the steps of S1, dissolving a rare-earth metal compound into water, dropwise addingan alkaline solution to regulate pH to 8-9, and stirring for 0.5-2 hours to obtain rare-earth metal hydroxide slurry; S2, mixing rare-earth metal hydroxide slurry, a binder and deionized water according to the mass ratio of (0.5-0.8):(0.8-1.2):(40-44), and stirring to obtain atomization slurry; S3, feeding an alumina material and the atomization slurry into the stock bin of a fluidized bed to perform granulation so as to obtain products; S4, baking to dry the products to obtain the needed rare-earth composite alumina balls. The rare-earth composite alumina balls prepared by the method is highabsorption efficiency to fluoride ions in wastewater.

Description

technical field [0001] The invention relates to the technical field of metal oxide adsorbents, in particular to a preparation method of rare earth composite alumina balls. Background technique [0002] Fluorine is an essential element for the human body and one of the elements that make up human bones and hair. The fluorine needed by the human body is mainly taken in through drinking water and food. A small amount of fluorine intake is easy for the human body, and it is helpful for the development of bones and teeth, the conduction of the nervous system and the metabolism of the enzyme system. However, excessive fluorine intake will have adverse effects on the body. When the mass concentration of fluorine intake is >1mg / L, it will cause dental caries; when the mass concentration exceeds 4mg / L, it will cause bone fluorosis. [0003] At present, more than ten million residents in my country are still under the hazards of fluorine. On the one hand, it is caused by the natur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/30C02F1/28C02F101/14
CPCB01J20/06B01J20/08B01J20/28019B01J20/3028B01J20/3042C02F1/281C02F2101/14
Inventor 孟磊黄正耀
Owner 福建璞睿泰科新材料科技有限公司
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