Method for synthesizing pure 4A zeolite, P-shaped zeolite and sodalite with concavo-convex attapulgite clay

A technology of attapulgite clay and synthesis method, which is applied in the direction of A-type crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., which can solve the problems of restricting the application field of synthetic zeolite, limiting the source of raw materials, and high production cost, and achieve production Low cost, simple synthesis method, and easy-to-obtain raw materials

Inactive Publication Date: 2010-01-06
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned zeolite can be hydrothermally synthesized by chemical raw materials containing aluminum or silicon and sodium hydroxide, with high purity and good quality, but the production cost is high, and the source of raw materials is limited, which restricts the application field of synthetic zeolite

Method used

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  • Method for synthesizing pure 4A zeolite, P-shaped zeolite and sodalite with concavo-convex attapulgite clay
  • Method for synthesizing pure 4A zeolite, P-shaped zeolite and sodalite with concavo-convex attapulgite clay
  • Method for synthesizing pure 4A zeolite, P-shaped zeolite and sodalite with concavo-convex attapulgite clay

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Experimental program
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Effect test

Embodiment 1

[0016] Use attapulgite clay as raw material to prepare pure 4A zeolite: calcinate attapulgite clay at 800°C for 1h; put 5g of attapulgite clay in 20ml of 5mol / L NaOH solution, stir at 100°C for 1h, filter, get Na 2 SiO 3 The leaching solution; the 2.5gNaAlO 2 Added to 19.23g H 2 Stir evenly in O, pour the aluminum source solution into the above leaching solution, stir for 0.5h, the mixed solution is hydrothermally crystallized at 80°C for 5h, and the product is obtained after filtration, washing and drying; the product sample is characterized by XRD and SEM, and it is cubic pure 4A Zeolite.

Embodiment 2

[0018] Use attapulgite clay as raw material to prepare pure 4A zeolite: calcinate attapulgite clay at 700°C for 2h; put 5g of calcined attapulgite clay in 20ml of 5mol / L NaOH solution, stir at 90°C for 1.5h, filter , get Na 2 SiO 3 The leaching solution; the 3.6gNaAlO 2 Added to 19.23g H 2 Stir evenly in O, pour the aluminum source solution into the above leaching solution, stir for 0.5h, the mixed solution is hydrothermally crystallized at 85°C for 5h, and the product is obtained after filtration, washing and drying; the product sample is characterized by XRD and SEM, and it is cubic pure 4A Zeolite.

Embodiment 3

[0020] Prepare pure 4A zeolite with attapulgite clay as raw material: calcinate attapulgite clay at 600°C for 3h; put 5g of calcined attapulgite clay in 20ml of 5mol / L NaOH solution, stir at 85°C for 2h, filter, get Na 2 SiO 3 The leaching solution; the 5.4gNaAlO 2 Added to 19.23g H 2 Stir evenly in O, pour the aluminum source solution into the above leaching solution, stir for 0.5h, the mixed solution is hydrothermally crystallized at 90°C for 5h, and the product is obtained after filtration, washing and drying; the product sample is characterized by XRD and SEM, and it is cubic pure 4A Zeolite.

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Abstract

The invention discloses a method for synthesizing pure 4A zeolite, P-shaped zeolite and sodalite with concavo-convex attapulgite clay. The method is characterized by comprising the following steps: firstly, the concavo-convex attapulgite clay is calcined in high temperature; then, the calcined concavo-convex attapulgite clay is soaked by soda liquor to obtain leach liquor containing Na2SiO3; finally, an aluminum source is added into the soda leach liquor to carry out hydrothermal crystallization synthesis, and then, the pure 4A zeolite, the P-shaped zeolite and the sodalite are respectively obtained by filtration, rinsing and drying. In the method, the concavo-convex attapulgite clay is used as raw material, and the genuine 4A zeolite, the P-shaped zeolite and the sodalite are respectively obtained by calcination and soda-leach pretreatment through adjusting synthesis conditions, therefore the invention has the advantages of simple synthesis method, easily obtained raw material and low production cost.

Description

technical field [0001] The invention relates to a method for synthesizing pure 4A zeolite, P-type zeolite and sodalite by using attapulgite clay as a raw material, specifically a method of using calcined attapulgite clay as a silicon source to synthesize pure Methods for Zeolite 4A, Zeolite P and Sodalite. Background technique [0002] Zeolite is an aluminosilicate crystal with regular pores, large specific surface area, and high hydrothermal stability. It has been widely used in the fields of catalysis, adsorption, and separation. Among them, 4A zeolite and P-type zeolite have strong ion exchange capacity, and are excellent substitutes for detergent builder sodium tripolyphosphate, and can also be used as adsorbent, desiccant, etc.; sodalite is a kind of Porous aluminosilicate zeolite with pore size can be used as adsorbent, photochromic material and hydrogen storage material, and has great industrial application prospect. The above-mentioned zeolite can be hydrothermall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/14C01B39/02
Inventor 蒋金龙金叶玲固旭冯良东
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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