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Method for preparing benzene adsorbing material by utilizing discarded activated aluminum oxide

A technology for activated alumina and benzene adsorption, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of reduced activity of alumina, environmental pollution, waste of resources, etc., and achieve excellent adsorption performance

Inactive Publication Date: 2013-04-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the prolongation of use time, the activity of alumina will gradually decrease until it cannot meet the production requirements and must be replaced
The replaced waste activated alumina is discarded in large quantities, which not only causes a waste of resources, but also pollutes the environment and creates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The benzene adsorption material was developed by using waste activated alumina, and its raw materials were as follows: waste activated alumina.

[0020] The preparation steps are:

[0021] (1) Pretreatment: Wash the waste activated alumina with water and dry it in the sun.

[0022] (2) Calcination: Put the dried waste activated alumina into a ceramic crucible, cover the lid, put it into the kiln, raise the temperature to 300°C at a rate of 200°C / h and keep it for 3 hours, then cool down with the furnace to get composite material.

[0023] Performance: The iodine adsorption value of the sample is 233.27 mg / g, the carbon element content of the sample is 3.57%, and the specific surface area is 234.70m 2 / g, the pore volume is 0.41m 3 / g, and the average pore diameter is 6.59 nm. The sample has a good adsorption effect on benzene, and the saturated adsorption rate can reach 21.80%.

Embodiment 2

[0025] The benzene adsorption material was developed by using waste activated alumina, and its raw materials were as follows: waste activated alumina.

[0026] The preparation steps are:

[0027] (1) Pretreatment: Wash the waste activated alumina with clean water, put it in a drying oven at a constant temperature of 100°C and dry it for 1 hour.

[0028] (2) Calcination: Put the dried waste activated alumina into a stainless steel jar, cover the lid, put it into the kiln, raise the temperature to 400°C at a rate of 200°C / h and keep it for 2 hours, then cool it down with the furnace. composite material.

[0029] Performance: The iodine adsorption value of the sample is 231.44 mg / g, the carbon element content is 2.36%, and the specific surface area is 205.1m 2 / g, the pore volume is 0.43m 3 / g, the average pore diameter is 7.82nm, the sample has a good adsorption effect on benzene, and the saturation adsorption rate can reach 23.28%.

Embodiment 3

[0031] The benzene adsorption material was developed by using waste activated alumina, and its raw materials were as follows: waste activated alumina.

[0032] The preparation steps are:

[0033] (1) Pretreatment: Wash the waste activated alumina with clean water, put it in a drying oven at a constant temperature of 100°C and dry it for 1 hour.

[0034] (2) Calcination: Put the dried waste activated alumina into a stainless steel jar, cover the lid, put it into the kiln, raise the temperature at a rate of 200°C / h to 500°C and keep it for 2 hours, and then cool it down with the furnace. composite material.

[0035] Performance: The iodine adsorption value of the sample is 231.44mg / g, the carbon element content is 1.89%, and the specific surface area is 242.20m 2 / g, the pore volume is 0.46m 3 / g, and the average pore diameter is 7.11 nm. The sample has a good adsorption effect on benzene, and the saturated adsorption rate can reach 24.01%.

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Abstract

The invention relates to a method for preparing a benzene adsorbing material by utilizing a discarded activated aluminum oxide. In the method, an activated aluminum oxide / active carbon composite material which has a high adsorption effect on benzene is prepared by cleaning, filtering and drying the discarded activated aluminum oxide and by closed heat treatment at low temperature. In the method, due to the adoption of a closed low-temperature heat treatment mode, holes which are blocked in the discarded activated aluminum oxide can be perforated, and organic matters adsorbed to the discarded activated aluminum oxide can be directly discomposed and carbonized and stored in the aluminum oxide holes to form active carbon, so air pollution is reduced. The method has a novel process, is simple, easy and low in cost and has a high environment friendliness and economic value, and wastes can be turned into wealth.

Description

technical field [0001] The invention relates to a method for utilizing waste activated alumina, in particular to a method for preparing a benzene adsorption material by using waste activated alumina. Background technique [0002] With the development of industry, the amount of industrial catalysts in various countries in the world has increased rapidly, and most of the spent catalysts and spent adsorbents are discarded as solid waste, which not only causes waste of resources, but also causes great pollution to the environment. Activated alumina is one of the main types of catalyst carrier and adsorbent, which has the advantages of high purity, easy access to raw materials, convenient processing, and adjustable physical and chemical properties. In the industrial production of hydrogen peroxide in chemical plants, activated alumina is used to adsorb anthraquinone degradation products and also to convert these degradation products into effective anthraquinones. With the prolon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01D53/02
Inventor 吴任平潘金凤
Owner FUZHOU UNIV