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Preparation method of high-efficiency adsorbent

An adsorbent and blast furnace slag technology, applied in the field of high-efficiency adsorbent and its preparation, can solve the problems of complex loading process, high production cost, low effective removal rate by adsorption method, etc., and achieves good adsorption performance, convenient operation and low cost. Effect

Inactive Publication Date: 2012-05-30
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effective removal rate of the adsorption method is not high; and the loaded nano-TiO 2 The photocatalytic material has the function of adsorbing and enriching indoor formaldehyde, and at the same time, with the help of loaded nano-TiO 2 Photocatalytic properties, completely remove formaldehyde through photocatalytic oxidation reaction, can effectively improve the removal efficiency of formaldehyde by adsorption method
But nano TiO 2 The loading process is more complex, and nano-TiO 2 The production cost is relatively high. If the load performance is not good, the shedding nano-TiO 2 itself a source of indoor air pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The high-efficiency adsorbent preparation method, at room temperature, the mass ratio of titanium-containing blast furnace slag to hydrochloric acid is 1:1, that is, 5g of titanium-containing blast furnace slag is placed in a reactor, and 5g of industrial hydrochloric acid is added. Control stirring rate 30r.min -1 , under stirring state, control reaction time 10h, obtain titanium-containing blast furnace slag-hydrochloric acid suspension. The sample slag after acid leaching was treated by precipitation, filtered and washed 3 times with tap water, dried in an oven at 105°C for 6 hours, and treated by ball milling to obtain a specific surface area of ​​101.85m 2 / g efficient adsorbent.

Embodiment 2

[0014] High-efficiency adsorbent preparation method: at room temperature, the mass ratio of titanium-containing blast furnace slag to hydrochloric acid is 1:2.5, that is, 5g of titanium-containing blast furnace slag is placed in a reactor, and 12.5g of industrial hydrochloric acid is added. Control stirring rate 50r.min -1 , under stirring state, control reaction time 5h, obtain titanium-containing blast furnace slag-hydrochloric acid suspension. The sample slag after acid leaching was treated by precipitation, filtered and washed with tap water three times, dried in an oven at 105°C for 7 hours, and treated by ball milling to obtain a specific surface area of ​​105.35m 2 / g efficient adsorbent.

Embodiment 3

[0016] High-efficiency adsorbent preparation method: at room temperature, the mass ratio of titanium-containing blast furnace slag to hydrochloric acid is 1:5, that is, 5g of titanium-containing blast furnace slag is placed in a reactor, and 25g of industrial hydrochloric acid is added. Control stirring rate 100r.min -1 , controlling the reaction time for 1 h to obtain a titanium-containing blast furnace slag-hydrochloric acid suspension. After acid leaching, the slag was precipitated, filtered and washed 3 times with tap water, dried in an oven at 105°C for 8 hours, and treated by ball milling to obtain a specific surface area of ​​104.35m 2 / g efficient adsorbent.

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PUM

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Abstract

The invention relates to a preparation method of a high-efficiency adsorbent. The preparation method comprises the following steps of: preprocessing titanium-contained blast furnace slag, i.e. carrying out ball milling, crushing and screening; carrying out acid dipping on the titanium-contained blast furnace slag at a room temperature; and precipitating, filtering, washing, drying and grinding sample slag subjected to acid dipping to prepare a high-efficiency adsorbent. By carrying out acid dipping on the titanium-contained blast furnace slag, TiO2 in the titanium-contained blast furnace slagis enriched, and the processed slag has better absorption characteristic. By the aid of the photocatalytic characteristics of the TiO2, the high-efficiency adsorbent with favorable absorption performance is prepared and used as an air-purifying material in closed places, such as families, working units, public refreshment houses, and the like.

Description

technical field [0001] The invention relates to indoor air purification technology, in particular to a high-efficiency adsorbent and a preparation method thereof. Background technique [0002] Formaldehyde is a kind of colorless, the gas that has strong pungent smell, has been determined as carcinogenic and teratogenic shape material by the World Health Organization, is the allergen of generally acknowledging, also is one of potential strong mutagen. Long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, nasopharyngeal cancer, colon cancer, brain tumors, pregnancy syndrome, neonatal chromosomal abnormalities, leukemia, memory and mental decline in adolescents. Therefore, it is very necessary to study purification measures and fundamentally solve the problem of formaldehyde pollution (especially the indoor environment) while strengthening the supervision and testing of ambient air quality in living rooms and public places. As one of the effective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/32C21B3/06B01D53/02
CPCY02W30/50
Inventor 孔德彧刘荣王风贺李传统
Owner NANJING NORMAL UNIVERSITY