Method for producing molecular sieve by fly ash and molecular sieve prepared thereby

A molecular sieve and fly ash technology, applied in the field of molecular sieve, can solve the problem of high cost and achieve the effects of sufficient raw materials, reduced manufacturing cost and uniform shape

Inactive Publication Date: 2018-07-20
LIUZHOU LIUJING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Molecular sieves are widely used and can be used as high-efficiency desiccants, selective adsorbents, catalysts, ion exchangers, etc., but the cost of using chemical raw materials to synthesize molecular sieves is very high

Method used

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  • Method for producing molecular sieve by fly ash and molecular sieve prepared thereby
  • Method for producing molecular sieve by fly ash and molecular sieve prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this embodiment, the molecular sieve manufactured by fly ash is prepared through the following steps:

[0034](1) Mixing: The fly ash is subjected to magnetic separation-roasting-cooling pretreatment, wherein the magnetic separation adopts a high-efficiency magnetic separator for magnetic separation 5 times, and then it is roasted in a muffle furnace with a roasting temperature of 650 ° C for 3 hours, and cooled to At room temperature, put the pretreated fly ash, nano-anion powder, plant ash and caustic soda into a pulverizer to pulverize to obtain a mixed powder. The particle size of the mixed powder is 45 μm. Add it into a mixer, and stir at a speed of 35 rpm for 30 minutes to obtain a uniform mixed solution with good fluidity;

[0035] (2) Crystallization: the mixed solution obtained in step (1) was put into an autoclave and heated for 25 hours, and the heating temperature was 95°C. The mixed solution in the autoclave crystallized and separated out fly ash molecul...

Embodiment 2

[0040] In this embodiment, the molecular sieve manufactured by fly ash is prepared through the following steps:

[0041] (1) Mixing: the fly ash is subjected to magnetic separation-roasting-cooling pretreatment, wherein the magnetic separation adopts a high-efficiency magnetic separator magnetic separation for 3 times, and then it is roasted in a muffle furnace with a roasting temperature of 550 ° C for 2 hours, and cooled to At room temperature, put the pretreated fly ash, nano-anion powder, plant ash and caustic soda into a pulverizer to pulverize to obtain a mixed powder. The particle size of the mixed powder is 65 μm, and then the mixed powder, water glass, cold catalyst liquid and water Add it into a mixer, and stir at a speed of 25 rpm for 25 minutes to obtain a uniform mixed solution with good fluidity;

[0042] (2) Crystallization: the mixed solution obtained in step (1) was put into an autoclave and heated for 23 hours, the heating temperature was 85°C, the mixed solu...

Embodiment 3

[0047] In this embodiment, the molecular sieve manufactured by fly ash is prepared through the following steps:

[0048] (1) Mixing: the fly ash is subjected to magnetic separation-roasting-cooling pretreatment, wherein the magnetic separation adopts a high-efficiency magnetic separator for magnetic separation 4 times, and then it is roasted in a muffle furnace with a roasting temperature of 600°C for 2.5 hours, and cooled to At room temperature, put the pretreated fly ash, nano-anion powder, plant ash and caustic soda into a pulverizer to pulverize to obtain a mixed powder. The particle size of the mixed powder is 50 μm, and then add the mixed powder, water glass, cold catalyst liquid and water in sequence In the mixer, after stirring for 27 minutes at a speed of 30 rpm, a uniform mixed solution with good fluidity was obtained;

[0049] (2) Crystallization: the mixed solution obtained in step (1) was put into an autoclave and heated for 24 hours, the heating temperature was 9...

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Abstract

The invention relates to a method for producing molecular sieve by fly ash and a molecular sieve prepared thereby. The molecular sieve is prepared from the following raw materials in parts by weight:60-70 parts of fly ash, 20-30 parts of a nano negative ion powder, 8-12 parts of plant ash, 5-8 parts of caustic soda, 8-12 parts of water glass, 15-25 parts of a cold catalyst liquid and 30-60 partsof water. The fly ash is subjected to magnetic separation, roasting and cooling pretreatment, then mixed and stirred with other solid raw materials and liquid raw materials, next subjected to crystallization treatment by a thermal autoclave, and subjected to vacuum negative pressure drying and molding in a vacuum drying oven, and thus the molecular sieve is obtained. With the fly ash as the main raw material, the construction cost is low, the raw materials are sufficient, the solid waste fly ash resources is effectively utilized, secondary utilization of the resources is achieved, the environmental pollution caused by the accumulation of fly ash is also avoided, and he prepared molecular sieve has the inner crystal surface highly polarized and has good adsorption effect.

Description

technical field [0001] The invention relates to the field of molecular sieves, in particular to a method for manufacturing molecular sieves by using fly ash and the prepared molecular sieves. Background technique [0002] Molecular sieve refers to a class of substances with uniform micropores whose pore size is equivalent to that of ordinary molecules. Commonly used molecular sieves are crystalline silicates or aluminosilicates, which are pore and cavity systems of molecular size (usually 0.3-2nm) formed by connecting silicon-oxygen tetrahedrons or aluminum-oxygen tetrahedrons through oxygen bridges. . Molecular sieves are widely used and can be used as high-efficiency desiccants, selective adsorbents, catalysts, ion exchangers, etc., but the cost of using chemical raw materials to synthesize molecular sieves is very high. [0003] Fly ash is the fine ash collected from the flue gas after coal combustion, and is the main solid waste discharged from coal-fired power plants....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/22
CPCC01B39/22C01P2004/61C01P2006/12
Inventor 任文强
Owner LIUZHOU LIUJING TECH CO LTD
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