Preparing process of composite block adsorbent of molecular sieve and modified silica gel

A technology of molecular sieves and composites, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of affecting the adsorption performance of composite adsorbents, the inherent structural damage of molecular sieves, and uneven fiber deposition, etc. problems, to achieve the effect of improving service life, good heat resistance, and increasing specific surface area

Inactive Publication Date: 2007-06-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual process, it was found that this method has defects such as poor dispersion of molecular sieves in water glass and uneven deposition on fibers. At the same time, due to the strong alkalinity of water glass, the inherent structure of molecular sieves is easily damaged, thereby affecting the composite adsorbent. Adsorption performance

Method used

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  • Preparing process of composite block adsorbent of molecular sieve and modified silica gel
  • Preparing process of composite block adsorbent of molecular sieve and modified silica gel
  • Preparing process of composite block adsorbent of molecular sieve and modified silica gel

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) At room temperature, in a 20L square plastic container, add 2.5L of water, then add 10kg of water glass with a modulus of 3.5 and a concentration of 25%. Hot rolling on the machine into a corrugated shape, and bonding with the ceramic flat paper impregnated with the same method under the action of water glass to make a honeycomb ceramic block (100×100×100mm), and then air-drying at 120°C for 8 hours, cooling to room temperature;

[0032] (2) In a 20L square plastic container, weigh 1.5kg of titanyl sulfate and 1.5kg of aluminum sulfate and dissolve them in 12L of water, add acetic acid to adjust the pH of the solution to 1.0, heat up to 60°C, and stir the above honeycomb Immerse the solid block into it, and strictly control the pH value (as the reaction progresses, the pH value of the solution will increase, and acid solution needs to be added from time to time, the same below), take it out after 6 hours, rinse with clean water, and dry in the air;

[0033](3) Take...

Embodiment 2

[0035] (1) At room temperature, in a 20L square plastic container, add 2.5L of water, then add 10kg of water glass with a modulus of 3.5 and a concentration of 25%, stir evenly, immerse the ceramic fiber paper in it, take it out after 20 minutes and dry it Roll it into a corrugated shape on a corrugating machine, and bond it with the ceramic flat paper impregnated in the same way under the action of water glass to make a honeycomb ceramic block (100×100×100mm), and then dry it by blowing at 120°C for 8 hours , cooled to room temperature;

[0036] (2) In a 20L square plastic container, weigh 1.5kg of titanyl sulfate and 1.5kg of aluminum sulfate and dissolve them in 12L of water, add lactic acid to adjust the pH of the solution to 1.2, heat up to 60°C, and stir the above honeycomb Immerse the shaped block in it, and strictly control the pH value, take it out after 6 hours, rinse it with clean water, and dry it;

[0037] (3) Take another 25L square plastic container, add 15L of...

Embodiment 3

[0039] (1) At room temperature, in a 20L square plastic container, add 2.5L of water, then add 10kg of water glass with a modulus of 3.5 and a concentration of 25%, stir evenly, immerse the ceramic fiber paper in it, take it out after 20 minutes and dry it Roll it into a corrugated shape on a corrugating machine, and bond it with the ceramic flat paper impregnated in the same way under the action of water glass to make a honeycomb ceramic block (100×100×100mm), and then dry it by blowing at 120°C for 8 hours , cooled to room temperature;

[0040] (2) In a 20L square plastic container, weigh 1.5kg of titanium sulfate and 1.5kg of aluminum sulfate and dissolve them in 12L of water, add acetic acid to adjust the pH value of the solution to 0.8, heat up to 60°C, and stir the above honeycomb The block is immersed in it, and the pH value is strictly controlled. After 6 hours, it is taken out, rinsed with clean water, and dried;

[0041] (3) Take another 25L square plastic container...

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Abstract

The preparation process of composite block adsorbent of molecular sieve and modified silica gel includes the following steps: soaking ceramic fiber paper in water glass and hot pressing to form corrugated paper, adhering to flat sheet paper through the soaking at the same condition to form honeycomb block, drying, soaking the block into metal salt solution to react, washing with clear water, soaking the block in mixed liquid comprising silica sol and molecular sieve, taking out, sweeping to eliminate liquid and air drying to obtain the adsorbent. The adsorbent has homogeneous distribution of adsorbent grains on the base material, high adsorption amount, low regeneration temperature and high heat stability, and is suitable for adsorbing dehumidifying and whole heat recovery at different humidity and / or different temperature.

Description

technical field [0001] The invention relates to a gas adsorption drying purification and heat recovery technology, in particular to a preparation method of a molecular sieve and a modified silica gel composite block adsorbent. Background technique [0002] The honeycomb block adsorbent formed by the organic combination of ceramic fiber and adsorbent can be used as a dehumidification core and applied to the adsorption dehumidification wheel and the total heat recovery system. Adsorbents used as dehumidification cores mainly include silica gel, molecular sieves, etc., each of which has its own advantages and disadvantages. Silica gel has a good adsorption capacity, and the regeneration temperature is low (150°C). Its disadvantage is that the adsorption capacity is small at low humidity or at a higher temperature; at the same time, its thermal stability is poor. When it is regenerated at a higher temperature, it is very Porous materials with a regular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/28
Inventor 方玉堂蒋赣高学农张正国王磊
Owner SOUTH CHINA UNIV OF TECH
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