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Preparation method of efficient modified molecular sieve adsorbent

A molecular sieve and adsorbent technology, which is applied in the field of preparation of high-efficiency modified molecular sieve adsorbent, can solve the problems of difficult process control, high energy consumption, and difficulty in effectively utilizing zeolite, etc., and achieves stable product, low energy consumption and long service life. Effect

Active Publication Date: 2014-04-16
THE PLA NAVY SUBMARINE INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for pyrolysis in the preparation process, high energy consumption, and the process is not easy to control, it is difficult to effectively and fully utilize the inner surface of zeolite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) 100g of crystallized ZSM-5 zeolite powder (silicon-aluminum ratio of 800, BET specific surface area of ​​389m 2 / g) mixed with 20g kaolin, stirred evenly at room temperature, extruded into strips, dried to obtain a shaped molecular sieve;

[0028] (2) Soak the formed molecular sieve prepared in (1) in 300mL of FeCl with a concentration of 0.3mol / L 3 In the solution, ion exchange was performed for 2 hours, and the exchange was repeated 3 times to obtain a metal-loaded molecular sieve;

[0029] (3) fully washing the metal-loaded molecular sieve obtained in (2) with deionized water, and drying to obtain a highly efficient modified molecular sieve precursor;

[0030] (4) Calcining and activating the high-efficiency modified molecular sieve precursor prepared in (3) in a muffle furnace at 500°C for 5 hours to obtain the high-efficiency modified molecular sieve adsorbent A.

[0031] This high-efficiency modified molecular sieve adsorbent A is measured by gravimetric met...

Embodiment 2

[0033] (1) 100g of crystallized Beta zeolite powder (silicon-aluminum ratio of 15, BET specific surface area of ​​454m 2 / g) mixed with 20 grams of diatomite, stirred evenly at room temperature, extruded into strips, dried to obtain a molded molecular sieve;

[0034] (2) Soak the formed molecular sieve prepared in (1) in 300mL Co(NO 3 ) 2 In the solution, ion exchange was performed for 2 hours, and the exchange was repeated 3 times to obtain a metal-loaded molecular sieve;

[0035] (3) fully washing the metal-loaded molecular sieve obtained in (2) with deionized water, and drying to obtain a highly efficient modified molecular sieve precursor;

[0036] (4) Calcining and activating the high-efficiency modified molecular sieve precursor prepared in (3) in a muffle furnace at 450° C. for 4 hours to obtain the high-efficiency modified molecular sieve adsorbent B.

[0037] The high-efficiency modified molecular sieve adsorbent B is measured by gravimetric method. Under normal te...

Embodiment 3

[0039] (1) 100g of crystallized HY zeolite powder (silicon-alumina ratio of 15, BET specific surface area of ​​680m 2 / g) mixed with 20 grams of pseudo-boehmite powder, stirred evenly at room temperature, extruded into strips, dried to obtain a shaped molecular sieve;

[0040] (2) Soak the shaped molecular sieve prepared in (1) in 300mL Mn(NO 3 ) 2 In the solution, ion exchange was performed for 2 hours, and the exchange was repeated 3 times to obtain a metal-loaded molecular sieve;

[0041] (3) fully washing the metal-loaded molecular sieve obtained in (2) with deionized water, and drying to obtain a highly efficient modified molecular sieve precursor;

[0042] (4) Calcining and activating the high-efficiency modified molecular sieve precursor prepared in (3) in a muffle furnace at 550° C. for 2 hours to obtain the high-efficiency modified molecular sieve adsorbent C.

[0043] The high-efficiency modified molecular sieve adsorbent C is measured by gravimetric method. Under...

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Abstract

The invention relates to a preparation method of an efficient modified molecular sieve adsorbent. The preparation method comprises the following steps: molecular sieve molding, namely mixing high-silica zeolite powder with a large specific surface with a binder which accounts for 5-50wt%, evenly stirring the mixture at room temperature, extruding into strips, and baking to obtain a molded molecular sieve; transition metal loading, namely soaking the molded molecular sieve into a transition metal salt solution to carry out ion exchange for a plurality of times, so as to obtain metal-loaded molecular sieve; washing and baking, namely, fully washing the metal-loaded molecular sieve by deionized water, and baking so as to obtain an efficient modified molecular sieve precursor; and roasting and activating, namely roasting and activating the efficient modified molecular sieve precursor into a muffle furnace, so as to obtain the efficient modified molecular sieve adsorbent. The efficient modified molecular sieve adsorbent disclosed by the invention has a broad application prospect on quality control of indoor air and control of organic matters, and is especially applicable to air quality control of assembly occupancies.

Description

technical field [0001] The invention relates to the field of modification and preparation of molecular sieves, in particular to a preparation method of an efficient modified molecular sieve adsorbent. Background technique [0002] If various organic molecules such as carboxylic acids, amines, esters, sulfhydryls, and heterocyclics are dispersed in the air, when the concentration reaches a certain level, these organic molecules can produce unpleasant pungent odors. In a crowded environment, the organic substances secreted by the human body accumulate in the air after volatilization, which will seriously reduce the air quality and affect people's normal life and health. Therefore, various adsorbents for adsorbing organic matter have emerged as the times require. [0003] Activated carbon is a commonly used adsorbent due to its low cost and large specific surface area. However, due to the lack of selectivity, on the surface of activated carbon, various components in the air s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30
Inventor 李震蒋以山谢维杰俞宏坤于运治陈鲁宁肖锋
Owner THE PLA NAVY SUBMARINE INST
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