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A process for preparing mesoporous silica and recovering aluminum by using silica-alumina zeolite

A technology of mesoporous silica and silica-alumina zeolite, applied in the field of comprehensive utilization of resources, can solve the problems of high cost, limit the industrial application of template method, etc., and achieve the effects of strong practicability, low cost and simple production process

Inactive Publication Date: 2018-04-13
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High cost limits the industrial application of template method

Method used

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  • A process for preparing mesoporous silica and recovering aluminum by using silica-alumina zeolite
  • A process for preparing mesoporous silica and recovering aluminum by using silica-alumina zeolite

Examples

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Comparison scheme
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Embodiment 1

[0023] A new technology for the comprehensive utilization of silica-alumina zeolite resources and the preparation of mesoporous silica, which comprises the following steps:

[0024] Mix 13X silica-alumina zeolite molecular sieve with 5mol / L HCl solution at a ratio of 1kg:20L, stir and react at 80°C for 6h, then filter and wash the obtained solid product with deionized water until neutral, and then pass through 110 ℃ drying to remove water, and obtain a mesoporous silica material prepared by a template-free method. The aluminum-containing acidic leaching solution obtained after filtration can be used to extract aluminum and prepare metallic aluminum or mesoporous alumina.

[0025] The specific surface area of ​​the mesoporous silica material obtained in this example is 790m 2 / g, its most probable pore diameter is 3.8nm. Its nitrogen adsorption-desorption isotherm and the pore size distribution obtained according to the BJH model are as follows: figure 1 and figure 2 shown...

Embodiment 2

[0027] A new technology for the comprehensive utilization of silica-alumina zeolite resources, which comprises the following steps:

[0028]Mix 4A silica-alumina zeolite molecular sieve with 5mol / L HCl solution at a ratio of 1kg:20L, stir and react at 80°C for 6h, then filter and wash the obtained solid product with deionized water until it is neutral, and pass through 110 ℃ drying to remove water, to obtain the mesoporous silicon oxide material prepared by the template-free method. The aluminum-containing acidic leaching solution obtained after filtration can be used to extract aluminum.

[0029] The specific surface area of ​​the mesoporous silicon oxide material obtained in this example is 751m 2 / g, its most probable pore diameter is 3.9nm.

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Abstract

The invention relates to the fields of silica-alumina zeolite resource utilization and mesoporous silica material preparation, in particular to a new comprehensive resource utilization technique for preparing mesoporous silica with silica-alumina and extracting aluminum in silica-alumina zeolite.The technique includes the following steps: subjecting the silica-alumina zeolite and acid solution to reaction, completely destroying the crystal structure of the zeolite through acid treatment, leaching metallic elements in ingredients, and then performing solid-liquid separation to obtain solid phase and aluminiferous acid solution; washing and drying the solid phase to obtain the silica-alumina zeolite with the specific surface area being 580-800 m<2> / g and the most probable pore size being 3.5-4.5nm, and extracting the aluminum from the aluminiferous acid solution obtained after filtering.

Description

technical field [0001] The invention relates to the fields of resource utilization of silica-alumina zeolite and preparation of mesoporous silicon oxide materials, in particular to a new technology for resource utilization and comprehensive utilization of silica-alumina zeolite for preparing mesoporous silica materials and extracting aluminum elements in silica-alumina zeolite. Background technique [0002] Due to its excellent pore size distribution (2-50nm) and large specific surface area, mesoporous materials have been widely used in many aspects such as adsorption, separation, catalysis, drug embedding and delivery. Mesoporous silica is one of the largest families of inorganic materials in mesoporous materials. With its high specific surface area, excellent thermal stability, good hydrothermal stability, abundant surface acid-base sites and thick pore wall And other characteristics, has been widely used in adsorption separation, catalysis, ion exchange, micro-reaction an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12C22B3/06C22B21/00
CPCC01B33/12C01P2006/12C01P2006/16C22B3/06C22B21/0015Y02P10/20
Inventor 李天天舒杼周俊
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)