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Structured silica gel adsorption material and preparation method thereof

A technology of structured silica gel and adsorption material, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of low strength and hardness of matrix material, low overall strength of adsorption material, and unsuitable distribution of silica gel layer, etc. Achieve long service life, easy modular filling, high surface active channels

Active Publication Date: 2019-04-09
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method requires special processing of ceramic fiber sheets, and the strength and hardness of the base material used are low. The silica gel layer should not be evenly distributed on the surface of the fiber, which is likely to cause differences in adsorption, and the overall strength of the adsorption material is not high.

Method used

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  • Structured silica gel adsorption material and preparation method thereof
  • Structured silica gel adsorption material and preparation method thereof
  • Structured silica gel adsorption material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] Embodiment 1: A kind of preparation method of structured silica gel adsorption material:

[0028] Soak a three-dimensional nickel foam sheet with a pore size of 0.1mm, a thickness of 0.6mm, and a porosity of 92% in a silane solution with a mass fraction of 2%, remove the residual liquid, dry it and cure it at 100°C for 1 hour, and dry the dried sample Then soak into the silica sol solution with a mass fraction of 20%, and pre-coat a layer of silica gel film. The program-controlled pulling machine was set at a pulling speed of 2 cm / min, a drying time of 15 min, and dip-coated 5 times to obtain a sample coated with water glass. After drying at room temperature for 15 minutes, soak it in a PAC solution with a heating temperature of 45°C and a mass fraction of 5%, take it out after 2 hours, rinse it with deionized water, and bake it at 120°C for 2 hours. Place in acetone solution and pass through an ultrasonic oscillator for 30 minutes, and the mass loss rate is 1.5%.

Embodiment 2

[0029] Embodiment 2: A kind of preparation method of structured silica gel adsorption material:

[0030] Soak a three-dimensional structure nickel foam sheet with a pore size of 0.5mm, a thickness of 2mm, and a porosity of 85% in a silane solution with a mass fraction of 5%, remove the residual liquid, dry it and cure it at 100°C for 2 hours, and dry the dried sample again. Immerse in a silica sol solution with a mass fraction of 30%, and pre-coat a layer of silica gel film. The program-controlled pulling machine was set at a pulling speed of 2 cm / min, a drying time of 15 min, and dip-coated 7 times to obtain a sample coated with water glass. After drying at room temperature for 30 minutes, soak it in a PAC solution with a heating temperature of 60°C and a mass fraction of 10%, take it out after 1 hour, rinse it with deionized water, and bake it at 100°C for 3 hours. Placed in acetone solution and subjected to an ultrasonic oscillator for 30 minutes, the mass loss rate was 0....

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Abstract

The invention discloses a structured silica gel adsorption material and a preparation method thereof. The preparation method comprises the following steps: (1) putting a three-dimensional-structure foamed nickel membrane into a silane solution, taking out the foamed nickel membrane, and carrying out curing; (2) dipping foamed nickel with the surface coated with silane into acidic silica soil, pre-coating the foamed nickel with a layer of silica soil, taking out the foamed nickel, and airing; (3) carrying out lifting and dip-coating on the processed foamed nickel, and carrying out drying processing, wherein dip-coating liquid is water glass; and (4) soaking the foamed nickel into an aluminum polychlorid solution with a concentration of 5%-20% for 30-150 minutes, taking out the foamed nickel, flushing the foamed nickel with deionized water, airing, drying, and carrying out activation. According to the preparation method, the structured silica gel adsorption material is prepared through in-situ reaction by virtue of a dip-coating method. The adsorption material is capable of supplying high-surface-activity channels, so that the mass transfer rate is increased; and the abrasion among gains of a traditional particle adsorption material under an alternating pressure is avoided; and the development of a relatively compact rapid adsorption device is promoted.

Description

technical field [0001] The invention belongs to the technical field of chemical adsorption materials, in particular to a structured silica gel adsorption material and a preparation method thereof. Background technique [0002] Silica gel is a hard amorphous chain and network structure material with rich pore structure, large pore volume and specific surface area, and is resistant to water, CO 2 , alcohol, benzene, ether, etc. have good adsorption, so it is widely used in the preparation of various gas adsorbents, chromatographic column packing and environmental purification functional materials. In industrial production, traditional silica gel is usually piled up in the adsorption tower in granular form. In this filling mode, when the cycle frequency of the adsorption device is greatly increased, the inventory of the adsorbent increases, which is not conducive to improving the adsorption efficiency. Under rapid alternating pressure, it will intensify the mutual friction be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30
CPCB01J20/0225B01J20/10B01J20/22B01J20/28054
Inventor 刘京雷王浩贺伯钧徐宏张胜中张英
Owner EAST CHINA UNIV OF SCI & TECH
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