Method for preparing sodium type zeolite molecular sieves by utilizing red mud

A sodium-type zeolite and molecular sieve technology, which is applied in the field of zeolite molecular sieve preparation, can solve the problems of occupying farmland, consuming yard construction and maintenance management costs, water pollution, etc., and achieves the effects of reduced consumption, low cost, and simple process equipment

Inactive Publication Date: 2012-07-04
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A large amount of red mud accumulation not only occupies farmland, but also consumes huge storage yard construction and maintenance management costs, and its extremely high pH will also cause serious water pollution to the surrounding environment

Method used

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  • Method for preparing sodium type zeolite molecular sieves by utilizing red mud
  • Method for preparing sodium type zeolite molecular sieves by utilizing red mud
  • Method for preparing sodium type zeolite molecular sieves by utilizing red mud

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Embodiment 1

[0039] see figure 1 Steps, the method for preparing sodium-type zeolite molecular sieves using red mud in this embodiment specifically includes the following steps:

[0040] 1. Take red mud and use XRF analysis method to analyze red mud, and the analysis shows that the ratio of silicon to aluminum in red mud is 1.47;

[0041] 2. Take 10g of ground and sieved red mud and mix it with 2mol / L NaOH solution, adjust the sodium-silicon ratio in the mixture to 1.3, stir for five minutes, and then add NaOH solution 2 SiO 3 9H 2 O adjusts the silicon to aluminum ratio in the mixture to 4.5.

[0042] 3. Stir the mixture, mix and age the rubber, the aging temperature is 60°C, and the aging time is 10h;

[0043] 4. Crystallize the above mixture at 110°C for 12 hours;

[0044] 5. The solid product after the crystallization reaction is cooled, filtered, washed and dried to obtain the zeolite molecular sieve.

[0045] Measure the phase composition and morphology of the reaction product ...

Embodiment 2

[0047] see figure 1 Steps, the method for preparing sodium-type zeolite molecular sieves using red mud in this embodiment specifically includes the following steps:

[0048] 1. Take red mud and use XRF analysis method to analyze red mud, and the analysis shows that the ratio of silicon to aluminum in red mud is 1.47;

[0049] 2. Take 10g of ground and sieved red mud and mix it with 2mol / L NaOH solution, adjust the sodium-silicon ratio in the mixture to 1.3, stir for five minutes, and then add NaOH solution 2 SiO 3 9H 2 O adjusts the silicon to aluminum ratio in the mixture to 4.5.

[0050] 3. Stir the mixture, mix and age the rubber, the aging temperature is 60°C, and the aging time is 8h;

[0051] 4. Crystallize the above mixture at 120°C for 12 hours;

[0052] 5. The solid product after the crystallization reaction is cooled, filtered, washed and dried to obtain the zeolite molecular sieve.

[0053] Measure the phase composition and morphology of the reaction product w...

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Abstract

A method for preparing sodium type zeolite molecular sieves by utilizing red mud comprises the steps of regulating the molar ratio of sodium silicon in the red mud to be 1.0-3.0 and regulating the molar ratio of silicon aluminum to be 2.0-5.0; heating to enable the red mud to be mixed with rubber and achieve aging; heating to enable the red mud to achieve crystallization reaction; cooling, filtration washing and drying a solid product after crystallization to obtain the zeolite molecular sieves. The method is cheap in raw material, simple in device, simple and convenient in operation and simple and feasible in preparation of the sodium type zeolite molecular sieves, and simultaneously provides a novel way for comprehensively utilizing the red mud.

Description

technical field [0001] The invention relates to a method for preparing a zeolite molecular sieve, in particular to a method for hydrothermally synthesizing a sodium-type zeolite molecular sieve using red mud. Background technique [0002] Zeolite molecular sieves are a kind of porous mineral crystal materials with a regular pore structure and unique crystal chemical properties. Because of its unique crystal structure and crystal chemical properties, zeolite molecular sieve has a large specific surface area and excellent adsorption, separation, ion exchange and catalytic properties, and has a wide range of applications in the fields of chemical industry, building materials, agriculture and environmental protection. [0003] However, natural zeolite resources are limited, and the application performance of adsorption and ion exchange is also limited. Therefore, the artificial synthesis of zeolite molecular sieves has become an important source in the field of water treatment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02
Inventor 赵颖席北斗夏训峰牛永超张列宇杨天学
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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