Preparation method of porous activated aluminum oxide adsorbing material

A porous adsorption material and activated alumina technology, applied in the preparation of alkali metal aluminate/alumina/hydroxide, chemical instruments and methods, alkali metal chloride, etc., can solve the waste of limited resources, environmental pollution, use Short value cycle and other issues, to achieve the effect of convenient operation, no environmental pollution, and value maximization

Inactive Publication Date: 2015-03-25
武汉铂莱材料科技有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] Aluminum is currently the most used metal in the world outside of iron and steel. It is widely used in all walks of life. The cycle from finished products to loss of use value is relatively short, especially in the chemical industry where various aluminum salts are contained in fertilizers. If Inadequate utilization is not only a great pollution to the environment, but also a great waste of limited resources

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  • Preparation method of porous activated aluminum oxide adsorbing material

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Embodiment 1

[0022] (1) 19.2 g of solid sodium tetrachloroaluminate was dissolved and hydrolyzed with an excessive amount of ethanol aqueous solution, and insoluble sodium chloride was recovered by filtration. The reaction temperature of this process is 25°C, and at the same time, it needs to be fully stirred, and the stirring speed is 300rpm;

[0023] (2) adding an appropriate amount of water to the resulting ethanol solution to generate aluminum chloride hexahydrate insoluble in ethanol;

[0024] (3) Aluminum trichloride hexahydrate reacts with ammonia water to form a hydrated alumina suspension: age the suspension in the range of pH = 8.0 for 2.5 hours to make it into α-gibbsite, and then wash until there is no chloride ion.

[0025] (4) Dissolve α-diaspore with acid peptization into a sol with better fluidity, drop it into the oil ammonia column by dropwise addition, shrink into balls in the oil under the action of surface tension, then enter the ammonia water, and neutralize After ag...

Embodiment 2

[0029] (1) 19.2 g of solid sodium tetrachloroaluminate was dissolved and hydrolyzed with an excessive amount of ethanol aqueous solution, and insoluble sodium chloride was recovered by filtration. The reaction temperature of this process is 35°C, and at the same time, it needs to be fully stirred, and the stirring speed is 400rpm;

[0030] (2) adding an appropriate amount of water to the resulting ethanol solution to generate aluminum chloride hexahydrate insoluble in ethanol;

[0031] (3) Reaction of aluminum trichloride hexahydrate and ammonia water to form a hydrated alumina suspension: aging the suspension in the range of pH=8.5 for 3 hours to make it into α-gibbsite, and then washing until there is no chloride ion.

[0032] (4) Dissolve α-diaspore with acid peptization into a sol with better fluidity, drop it into the oil ammonia column by dropwise addition, shrink into balls in the oil under the action of surface tension, then enter the ammonia water, and neutralize Aft...

Embodiment 3

[0036] (1) 19.2 g of solid sodium tetrachloroaluminate was dissolved and hydrolyzed with an excessive amount of ethanol aqueous solution, and insoluble sodium chloride was recovered by filtration. The reaction temperature of this process is 45°C, and at the same time, it needs to be fully stirred, and the stirring speed is 500rpm;

[0037] (2) adding an appropriate amount of water to the resulting ethanol solution to generate aluminum chloride hexahydrate insoluble in ethanol;

[0038] (3) Aluminum trichloride hexahydrate reacts with ammonia water to form a hydrated alumina suspension: the suspension is aged in the range of pH=9.0 for 5 hours to make it into α-gibbsite, and then washed until there is no chloride ion.

[0039] (4) Dissolve α-diaspore with acid peptization into a sol with better fluidity, drop it into the oil ammonia column by dropwise addition, shrink into balls in the oil under the action of surface tension, then enter the ammonia water, and neutralize After ...

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Abstract

The invention relates to a preparation method of a porous activated aluminum oxide adsorbing material. The preparation method comprises the following steps: (1) dissolving and hydrolyzing solid sodium tetrachloroaluminate by using an ethanol water solution; (2) adding water into an obtained solution to generate aluminum trichloride hexahydrate; (3) adding ammonia water for reaction to generate hydrated alumina suspension liquid, and ageing to obtain alpha-diaspore; (4) peptizing by using acid to obtain sol, dropwise adding the sol into an oil-ammonia column by adopting a dripping method, allowing the sol to retract to form balls under the effect of a surface tensile force in oil, putting the balls into ammonia water, neutralizing and ageing to form hard gel ball-like substances, washing away oil ammonia by using water and drying; and (5) baking to obtain the porous activated aluminum oxide adsorbing material. The preparation method disclosed by the invention can be used for solving the problems of wastewater treatment, improving cyclic utilization of resources, realizing value maximization and increasing the additional value of byproducts; the porous activated aluminum oxide adsorbing material is good in thermal stability at high temperature, large in specific surface area, good in adsorption performance, simple in production process, convenient to operate, low in cost and basically free of environmental pollution from aspect of production technology.

Description

technical field [0001] The invention relates to the field of activated alumina preparation, in particular to a method for preparing a high-temperature-resistant and high-specific-surface-area activated alumina porous adsorption material by using industrial waste water. Background technique [0002] Aluminum is currently the most used metal in the world outside of iron and steel. It is widely used in all walks of life. The cycle from finished products to loss of use value is relatively short, especially in the chemical industry where various aluminum salts are contained in fertilizers. If Inadequate utilization is not only a great pollution to the environment, but also a great waste of limited resources. [0003] In the development process of modern industry, various by-products containing aluminum are often produced, which have low utilization value and appear as by-products in the production process, and often have a huge output. We can convert them into high value-added pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/14B01J20/08C01D3/04
Inventor 何清泉郭嘉陈旭泽伍佳伟谢学忠刘竞博
Owner 武汉铂莱材料科技有限公司
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