Method for preparing nano flyash zeolite

A technology for fly ash zeolite and fly ash is applied in the field of preparation of fly ash synthetic zeolite to achieve the effects of eliminating environmental damage, saving costs and being easy to operate.
CN101993089AInactive Publication Date: 2011-03-30INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
Publication Date
2011-03-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing nano flyash zeolite. Flyash is used as a raw material in the method, and the method comprises the following steps of: firstly melting the flyash and sodium hydroxide at high temperature; mixing the molten flyash with concentrated seawater used as a solvent, stirring and aging to obtain silica-alumina gel; crystallizing the silica-alumina gel hydrothermally, and then washing with water to be neutral; and finally drying to obtain a powdery product. Based on the special aperture structure of zeolite, the synthesized zeolite can be applied to catalysis, adsorption, ion exchange and soil improvement. By using the flyash and the concentrated seawater which are both wastes, the method realizes the recycling of the flyash and the concentrated seawater and is a new environment-friendly production method which meets the requirement of sustainable development.
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Description

technical field

[0001] The invention relates to a preparation method of fly ash synthetic zeolite, which uses the waste fly ash of coal-fired power plants and the waste concentrated seawater produced by seawater desalination plants as raw materials to prepare nano fly ash zeolite. Background technique

[0002] Fly ash is a solid waste discharged from coal-fired power plants. With the development of the power industry, the discharge of fly ash is increasing year by year. Except for some of them used in cement production, concrete and other construction industries, most of them are stacked or filled on site. Buried disposal takes up a lot of land and causes environmental pollution. Concentrated seawater refers to the part of the seawater that is about doubled after the freshwater is extracted by desalination technology; and the use of seawater circulation cooling technology, when used as industrial cooling water, the water in seawater gradually evaporates, and the concentratio...

Claims

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