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A kind of method that adds steric hindrance agent to prepare novel analcime

A technology of steric hindrance and analcime, which is applied in the direction of crystalline aluminosilicate zeolite and solid waste removal, can solve the problems of low product purity and high production cost, achieve high purity, reduce synthesis cost, and expand the scope of raw materials Effect

Active Publication Date: 2017-02-08
哈尔滨市金博达机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing novel analcite by adding a steric hindrance agent, which is used to solve the problems of low product purity and high production cost in the current method for preparing analcite question

Method used

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  • A kind of method that adds steric hindrance agent to prepare novel analcime
  • A kind of method that adds steric hindrance agent to prepare novel analcime

Examples

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Embodiment 1

[0024] Grind the fly ash into fine powder, pass through a 200-mesh sieve, place it in a muffle furnace, calcinate at 800°C for 2 hours, then wash it twice with water at a temperature of 75°C and a speed of 250r / min. 1.5h, and then carry out solid-liquid separation between the washing liquid and the fly ash, and the separated solid is dried at 120°C for 5 hours for later use; the pretreated fly ash and Na 2 CO 3 The solid mass ratio is 1:1 and mixed evenly. After roasting at 800°C for 1 hour, take it out and cool it to 25°C for later use; then impregnate the roasted product with 3mol / L HCl for 120min, filter to remove insoluble matter, and obtain silica-rich gel and crude AlCl 3 solution. Adjust crude AlCl with 3mol / L NaOH 3 pH value of the solution to 3.7, filtered to remove Fe(OH) 3 , the filtrate continued to add NaOH dropwise until the precipitation in the filtrate no longer increased, and the Mg(OH) was removed by filtration. 2 and other insoluble matter, the filtrate...

Embodiment 2

[0028]Grind the fly ash into fine powder, pass through a 200-mesh sieve, place it in a muffle furnace, calcinate at 750°C for 3 hours, and wash it with water three times at a temperature of 75°C and a speed of 300r / min. 1.5h, and then carry out solid-liquid separation between the washing liquid and the fly ash, and the separated solid is dried at 120°C for 5 hours for later use; the pretreated fly ash and Na 2 CO 3 Mix evenly at a mass ratio of 1:1.5, bake at 700°C for 2 hours, take it out and cool it to 25°C for later use; then impregnate the roasted product with 4mol / L HCl for 120 minutes, filter to remove insoluble matter, and obtain silica-rich gel and crude AlCl 3 solution. Adjust crude AlCl with 4mol / L NaOH 3 pH of the solution to 4.0, filtered to remove Fe(OH) 3 , the filtrate continued to add NaOH dropwise until the precipitation in the filtrate no longer increased, and the Mg(OH) was removed by filtration. 2 and other insoluble matter, the filtrate is the purifie...

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Abstract

The present invention relates to a method for preparing novel analcite by adding a steric hindrance agent. The method for preparing a new analcime by adding a steric hindrance agent: 1. Fly ash pretreatment and activation; 2. Utilizing activated powder Coal ash prepares sodium silicate and aluminum hydroxide; Three, synthetic novel analcime: aluminum hydroxide obtained after the fly ash is processed is mixed with sodium silicate solution, water, steric hindrance agent M, and the reaction mixture is The molar ratio is calculated as: Na2SiO3 / Al(OH)3=40─300, Na2SiO3 / M=2.5─5.0, Na2SiO3 / H2O=0.01─0.025; the steric hindrance agent M is one of ethanolamine, diethanolamine and triethanolamine Mixed solution with tetrapropylammonium hydroxide, the molar ratio of the two components in the mixed solution satisfies 1:5─1:50; stir the mixed materials, and hydrothermally synthesize them for 8─24 hours; take out the generated The product was washed with water, dried, and roasted to obtain a new type of analcime. The invention changes the crystal growth direction by adding a steric hindrance agent, and synthesizes a high-purity novel analcime mainly composed of four-membered rings and five-membered rings.

Description

technical field [0001] The invention relates to the fields of molecular sieve synthesis and solid waste resource utilization, in particular to a method for preparing novel analcime by adding a steric hindrance agent. Background technique [0002] Analcite (ANA) is a rare natural zeolite. After a large-scale analcite mine was discovered in Wushen Banner, Inner Mongolia, my country in 1998, the research on its properties and applications has attracted widespread attention from domestic scientific research institutions. Analcime is a small pore crystal, which makes it have superior performance in the adsorption and storage of radioactive substances and the selective catalysis of small molecules. As an important mineral resource and chemical raw material, analcime has a unique internal structure and crystal chemical properties, and can be widely used in catalysis, ion exchange and ion adsorption reactions, especially in the treatment of fluorine-containing wastewater. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02B09B3/00
CPCC01B39/04C01P2002/72C01P2004/03
Inventor 陈彦广徐婷婷陆佳韩洪晶李治淼张雷
Owner 哈尔滨市金博达机电有限公司
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