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Method for preparing spherical analcite mesoporous material from low-quality attapulgite clay tailings

A technology of attapulgite clay and mesoporous materials, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problem of incomplete conversion of attapulgite, achieve stable product quality, uniform pore size distribution, and easy control of the process

Active Publication Date: 2016-07-06
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Zhang Pingping et al. (Journal of Inorganic Chemistry, 2009, 25 (09): 1545-1550) also studied the effect of alkali etching on the structure of attapulgite, and found that the attapulgite structure evolved, and analcime was formed in the product, but the attapulgite structure Zeolite is only a by-product, and attapulgite is not completely converted, resulting in a mixture of attapulgite and analcime
Therefore, the conversion of low-grade attapulgite clay into analcime through a simple one-step reaction to prepare high-purity analcime will be of great significance for the high-value utilization of low-grade attapulgite clay, but there is no relevant report so far

Method used

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  • Method for preparing spherical analcite mesoporous material from low-quality attapulgite clay tailings
  • Method for preparing spherical analcite mesoporous material from low-quality attapulgite clay tailings
  • Method for preparing spherical analcite mesoporous material from low-quality attapulgite clay tailings

Examples

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Embodiment 1

[0025] Example 1 : 100g attapulgite clay (Al 2 o 3 , 10.5%; MgO, 2.5%; SiO 2 , 80%) was dispersed in 600mL of aqueous solution containing 1g of sodium sulfide, stirred and dissolved, ultrasonically treated for 65min, aged for 12h, transferred to a 5L sealed hydrothermal reactor, and reacted for 100h at a pressure of 6MPa and a temperature of 199°C, the product The spherical analcime mesoporous material is obtained after centrifugal separation, drying and crushing.

Embodiment 2

[0026] Example 2 : Mix 50g of attapulgite clay (Al 2 o 3 , 16%; MgO, 9%; SiO 2 ,70%) was dispersed in 3000mL aqueous solution containing 7.5g sodium carbonate and 2.5g potassium sulfide, stirred and dissolved, ultrasonically treated for 65min, aged for 1h, transferred to a 5L sealed hydrothermal reaction kettle, and heated at a pressure of 1.5MPa and a temperature of 100 °C for 100 h, the product was centrifuged, dried and pulverized to obtain a spherical analcime mesoporous material.

Embodiment 3

[0027] Example 3 : 100g attapulgite clay (Al 2 o 3 , 26%; MgO, 9%; SiO 2 , 55%) was dispersed in 3000mL aqueous solution containing 8g sodium sulfite and 7g sodium metaaluminate, stirred and dissolved, ultrasonically treated for 65min, aged for 6h, transferred to a 5L sealed hydrothermal reactor, under pressure 3MPa, temperature 180°C Conditional reaction for 20 hours, the product was centrifuged, dried and pulverized to obtain spherical analcime mesoporous material.

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Abstract

The invention discloses a method for preparing a spherical analcite mesoporous material from low-quality attapulgite clay tailings. The method is characterized in that through one-step hydrothermal reaction, the attapulgite clay tailings which are low in grade, complex in component and poor in adsorption property are transformed into a micron-grade spherical mesoporous adsorption material which is uniform and controllable in aperture distribution and excellent in adsorption property. On the premise that an organic surfactant type pore-forming agent is not introduced, the crystal structure and the aggregation state of attapulgite are transferred through one-step hydrothermal reaction, at the same time associated minerals are dissolved, crysatalized and recombined so as to obtain the mesoporous analcite material of the micron-grade spherical morphology, and the product is narrow in aperture distribution, simple in process, stable in product property, controllable in aperture distribution and excellent in adsorption property, and can be used as an adsorbent which is widely used in multiple fields such as efficient adsorption of antibiotics, mycotoxin, dye and heavy metals so as to remove enrichment of precious metal ions such as rubidium and caesium.

Description

technical field [0001] The invention relates to a method for preparing spherical analcime mesoporous materials by using low-quality attapulgite clay tailings, and belongs to the technical field of deep processing of non-metallic ores and synthesis of nanometer mesoporous materials. Background technique [0002] my country has attapulgite clay resources accounting for more than half of the world's total reserves, but since most of the attapulgite clay deposits in my country are produced in Mesozoic and Cenozoic continental basins, they mainly occur in Tertiary strata and are formed by lacustrine deposits. Because of the Lord. Due to changes in geological conditions during the formation of attapulgite, many other minerals are often co-grown at the same time. Their existence will affect the crystal development of attapulgite, and finally affect the chemical composition and rod crystal structure of attapulgite. and performance. Therefore, the content of attapulgite in attapulgi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02
CPCC01B39/02C01P2002/72C01P2004/03C01P2004/32C01P2006/17
Inventor 王文波王爱勤田光燕宗莉康玉茹
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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