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A kind of calcium/aluminum ion-exchange silica gel doped with rare earth element and preparation method thereof

A rare earth element and aluminum ion technology, applied in the field of chemistry, can solve the problems of high energy consumption in the production process, good doping effect, complicated operation steps, etc., and achieve the improvement of acid and alkali resistance, reduce potential safety hazards, and improve environmental friendliness. Effect

Active Publication Date: 2021-06-25
GUANGXI XINJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires the use of alcohol organic solvents. The production process consumes a lot of energy, the cost of raw materials is high, and the gel needs to be crystallized at high temperature to obtain the final product. The operation steps are complicated and easy to pollute the environment.
In the prior art, there is no report on the use of hydrothermal synthesis to obtain high-performance calcium / aluminum ion-exchange silica gel doped with rare earth elements, and no good results have been achieved by doping calcium / aluminum ion-exchange silica gel with rare earth elements. related reports

Method used

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  • A kind of calcium/aluminum ion-exchange silica gel doped with rare earth element and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the calcium / aluminum ion-exchange silica gel doped with rare earth elements of the present invention comprises the following steps:

[0025] A. Disperse 2.0kg of calcium carbonate in water to obtain dispersion A; disperse 0.5kg of alumina in water to obtain dispersion B; disperse 5.0kg of silicic acid in water to obtain dispersion C;

[0026] B. Put Dispersion A, Dispersion B and Dispersion C into the autoclave, then add 0.1kg of lanthanum nitrate, mix well; dropwise add sodium hydroxide solution, adjust the pH value of the mixture to 10; Under hydrothermal reaction 12 hours, obtain reaction product;

[0027] C. The reaction product was filtered, washed, and dried at 50°C to obtain a precursor; the precursor was crystallized at 375°C for 0.5 hours to obtain a product.

Embodiment 2

[0029] The preparation method of the calcium / aluminum ion-exchange silica gel doped with rare earth elements of the present invention comprises the following steps:

[0030] A. Disperse 1.5kg of calcium hydroxide in water to obtain dispersion A; disperse 2.0kg of aluminum hydroxide in water to obtain dispersion B; disperse 5.0kg of silica sol in water to obtain dispersion C;

[0031] B. Put Dispersion A, Dispersion B and Dispersion C into the autoclave, then add 0.01kg of yttrium oxide and mix evenly; add ammonia water and calcium hydroxide solution dropwise, and adjust the pH value of the mixture to 10.5; Under the condition of hydrothermal reaction for 8 hours, the reaction product was obtained;

[0032] C. The reaction product was filtered, washed, and dried at 100°C to obtain a precursor; the precursor was crystallized at 260°C for 7 hours to obtain a product.

Embodiment 3

[0034] The preparation method of the calcium / aluminum ion-exchange silica gel doped with rare earth elements of the present invention comprises the following steps:

[0035] A. Disperse 0.6 kg of calcium nitrate and 1.07 g of calcium hydroxide in water to obtain mixed solution A; disperse 1.1 kg of aluminum oleate in water to obtain dispersion B; disperse 5.0 kg of silicon-soluble sodium in water to obtain dispersion C;

[0036] B. Put the mixed liquid A, dispersion liquid B and dispersion liquid C into the autoclave, then add 0.0005kg samarium hydroxide and mix well; add potassium hydroxide solution dropwise to adjust the pH value of the mixed liquid to 9.5; Under hydrothermal reaction for 8.5 hours, the reaction product was obtained;

[0037] C. The reaction product was filtered, washed, and dried at 135°C to obtain a precursor; the precursor was crystallized at 220°C for 5.5 hours to obtain a product.

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Abstract

The invention discloses a calcium / aluminum ion-exchange silica gel doped with rare earth elements and a preparation method thereof. The calcium source, the aluminum source and the silicon source are respectively dispersed in water, and the calcium source dispersion liquid, the aluminum source dispersion liquid and the silicon source are dispersed. and then add rare earth element additives. After mixing evenly, adjust the pH to 4.0-12.0, then prepare the reactant by hydrothermal synthesis, dry and pulverize the reactant to obtain the precursor, and then crystallize the precursor Handling is obtained. The calcium / aluminum ion-exchange silica gel obtained in the present invention is used in the production of coatings, papermaking, printing inks, plastics, and rubber. has good performance.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to calcium / aluminum ion-exchange silica gel doped with rare earth elements and a preparation method thereof. Background technique [0002] As a new type of material, ion-exchange silica gel has the advantages of non-toxic, non-polluting, heavy metal-free, high efficiency, and good synergistic effect. It has been researched and reported at home and abroad: Fuji Chemical in Japan and the UK have sold silicon dioxide as the base material. Calcium ion-exchange pigments; British Petroleum has also successfully developed two new types of anti-rust pigments, anion-exchanged alumina and cation-exchanged silica; Australia's Goldie and Mc Carrol developed rare-earth exchange silica gel anti-rust pigments to solve the problem of rare-earth salts. The problem of reusing the reaction mother liquor; the calcium ion-exchanged anti-rust pigment produced by the British Grace company is non-toxic, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J39/10B01J39/09
CPCB01J39/10B01J39/09
Inventor 廖欢王富丽王俊虹吴良胡容平李开成梁渝柠
Owner GUANGXI XINJING TECH
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