Method for preparing spherical analcime 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, and achieve the effects of stable product quality, uniform pore size distribution, and stable pore size

Active Publication Date: 2018-01-30
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment 1

[0025] Embodiment 1: 100 g attapulgite clay (Al 2 o 3 , 10.5%; MgO, 2.5%; SiO 2 , 80%) were dispersed in 600mL aqueous solution containing 1g sodium sulfide, stirred and dissolved, ultrasonically treated for 65min, aged for 12h, transferred to a 5 L sealed hydrothermal reactor, and reacted for 100 h, the product is centrifuged, dried, and pulverized to obtain a spherical analcime mesoporous material.

Embodiment 2

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

Embodiment 3

[0027] Embodiment 3: 100 g attapulgite clay (Al 2 o 3 , 26%; MgO, 9%; SiO 2 , 55%) was dispersed in 3000 mL of aqueous solution containing 8 g sodium sulfite and 7 g sodium metaaluminate, stirred and dissolved, ultrasonically treated for 65 min, aged for 6 h, transferred to a 5 L sealed hydrothermal reactor, and heated at a pressure of 3 MPa , and react at a temperature of 180 °C for 20 h, and the product is centrifuged, dried, and pulverized to obtain a 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 Patents(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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