Method for producing zeolite by using soil clay minerals as raw materials

A clay mineral and soil technology, applied in chemical instruments and methods, molecular sieves and alkali exchange compounds, inorganic chemistry, etc., can solve the problems of harsh reaction conditions, large energy consumption, long reaction time, etc., and achieve simple production process and economic efficiency. High, low-cost effects

Active Publication Date: 2016-03-23
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the industrial production of zeolite uses mostly industrially pure chemical reagents, and the cost is relatively high. The Chinese invention patent No. CN89108240 discloses a method for synthesizing zeolite by gas phase method, which has high energy consumption and low output.
The Chinese invention whose patent number is CN201410641519 discloses a method for synthesizing zeolite from fly ash, and the Chinese invention whose patent number is CN201010511239 discloses a method for removing nitrogen and phosphorus from sewage by synthesizing zeolite from fly ash. Pre-heat treatment is carried out above 400°C, and there are many additives, the reaction conditions are relatively harsh, the reaction process is complex, the reaction time is long, and the yield is low

Method used

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  • Method for producing zeolite by using soil clay minerals as raw materials
  • Method for producing zeolite by using soil clay minerals as raw materials
  • Method for producing zeolite by using soil clay minerals as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0036] The clay mineral in this group of examples uses montmorillonite as raw material, adjusts the Na / Al molar ratio as shown in the table below, fixes the liquid-solid mass ratio at 0.5, and reacts for 12 hours under saturated water vapor at 200°C. The specific operation is as follows: according to the liquid-solid ratio (mass ratio of deionized water to dry montmorillonite raw material) is 0.5, respectively weigh deionized water and montmorillonite raw material, and weigh sodium hydroxide according to the Na / Al molar ratio in the following table , dissolved in deionized water, added to the montmorillonite raw material, stirred evenly, formed into small particles, put into a high-pressure reactor, reacted under saturated water vapor at 200°C for 12h, air-dried and then dried at 80°C for 24h to obtain reaction product.

[0037] Embodiment 1~3 raw material ratio and product composition are as shown in the following table:

[0038] Example

[0039] This group of embo...

Embodiment 4～7

[0041] Examples 4-7 of this group use montmorillonite as raw material, the Na / Al molar ratio is 2:1, the liquid-solid ratio is adjusted according to the table below, and the reaction is carried out under saturated steam at 200°C for 12 hours. The specific operation is as follows:

[0042] Weigh deionized water and dried montmorillonite raw materials according to the different liquid-solid ratios in the table below, weigh sodium hydroxide according to the Na / Al ratio of 2:1, dissolve sodium hydroxide in deionized water and add montmorillonite In the stone raw material, stir evenly to form small particles, put it in a high-pressure reactor, react under saturated water vapor at 200°C for 12h, air-dry and dry at 80°C for 24h to obtain the reaction product.

[0043] Embodiment 4~7 raw material ratio and product composition are as shown in the following table:

[0044] Example

[0045] The X-ray powder diffraction (XRD) spectrum of the product that this group of embodiment ...

Embodiment 8～11

[0047] Examples 8-11 of this group use montmorillonite raw material, Na / Al in the raw material is fixed at 2:1, liquid-solid ratio is 0.5, react under saturated water vapor at 200°C, and change the reaction time as shown in the table below. The specific operation is as follows: Weigh the deionized water and the dried montmorillonite raw material respectively according to the liquid-solid ratio of 0.5, weigh the sodium hydroxide according to the Na / Al ratio of 2:1, dissolve the sodium hydroxide in the deionized water and add the montmorillonite In the destoned raw material, stir evenly to form small particles, put it into a high-pressure reactor, and react under saturated water vapor at 200°C for the different times in the table below, air-dry and dry at 80°C for 24 hours to obtain the reaction product.

[0048] Embodiment 8~11 reaction time and product composition are as shown in the following table:

[0049] Example

[0050] Embodiment 8~11 represent the X-ray powde...

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Abstract

The invention relates to a method for producing zeolite by using soil clay minerals as a raw material, and belongs to the technical field of mineral synthesis. The method is characterized by using the soil clay minerals as the raw material, drying the raw material and detecting the content of elements in the soil clay mineral; using NaOH and NaCl as sodium sources, wherein an alkaline environment is provided by NaOH; weighing the soil clay minerals and the sodium sources according to a molar ratio, which is (0.7 to 3):1, of Na and Al, weighing water according to a mass ratio, which is (0.15 to 0.75):1, of the water and the soil clay minerals, and adding NaOH or NaOH and NaCl in the soil clay minerals after dissolving NaOH or NaOH and NaCl in the water; then putting the mixture in a reaction kettle, treating the mixture for 4 to 12 hours under saturated water vapor of which the temperature is 120 to 240 DEG C, and obtaining a reaction product-the zeolite after drying, wherein the soil clay minerals are commercially available montmorillonite raw materials or illite raw materials, and NaCl and NaOH of the sodium sources are weighed according to a molar ratio which is (0 to 2):1. According to the method for producing the zeolite by using the soil clay minerals as the raw material, disclosed by the invention, the process is simple and convenient, the economic benefit is high, and the obtained product-analcime is purer.

Description

technical field [0001] The invention relates to a method for producing zeolite by using soil clay minerals as raw materials. The components of the soil clay minerals are montmorillonite and illite, and the zeolites are mainly analcite and mordenite, belonging to the technical field of mineral synthesis. Background technique [0002] Analcine in zeolite is a common feldspar-like mineral, which is an aluminosilicate mineral with a water-containing framework structure of alkali metal or alkaline earth metal ions. Its ideal chemical composition formula is NaAlSi 2 o 6 ·H 2 O, which is an equiaxed crystal system, the crystals are trioctahedron, tetrahedron and variable cube, and the aggregates are massive, granular and dense, which is composed of (Si,Al)O 4 The lattice structure composed of tetrahedrons connected by vertices is a typical cage structure with large openness and huge inner surface area. The cations such as Na and Ca in the structure have a weak connection with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/46
CPCC01B39/46C01P2002/72C01P2004/03
Inventor 景镇子袁源陈雨倩苗嘉俊蔡坤川
Owner TONGJI UNIV
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