Attapulgite acidifying modification method

An attapulgite and modified technology, applied in chemical instruments and methods, silicate, aluminum silicate, etc., can solve the problem that the proportion of primary processed products and low value-added products is high, high-quality raw materials cannot be used for production, and large quantities cannot be used. Production of high-end products and other issues to achieve the effect of improving adsorption

Inactive Publication Date: 2014-05-07
明光市恒大棒粉厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the clay products produced in my country are mainly used in low-end fields such as inorganic chemical industry, building materials industry, and agricultural edible oil processing. The proportion of primary processed products and low value-added products is relatively high, resulting in high-quality raw materials that cannot be used for production or cannot be produced in large quantities. high-end products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A method for acidifying and modifying attapulgite. Under the condition of 300°C, thermally activate attapulgite, soak the purified and activated attapulgite with 4mol / L sulfuric acid, wash with water until neutral, dry, grind, and sieve , to obtain the finished product, and the removal rate of heavy metal ions in the aqueous solution is close to 99%.

Embodiment 2

[0012] A method for acidifying and modifying attapulgite. Under the condition of 500°C, the attapulgite is thermally activated, and the purified and activated attapulgite is soaked in 4mol / L sulfuric acid, washed with water until neutral, dried, ground, and processed. Sieve to obtain the finished product, and the removal rate of heavy metal ions in the aqueous solution is close to 98%.

Embodiment 3

[0014] A method for acidifying and modifying attapulgite. Under the condition of 300°C, thermally activate attapulgite, soak the purified and activated attapulgite with 3mol / L nitric acid, wash with water until neutral, dry, grind, and sieve , to obtain the finished product, and the removal rate of heavy metal ions in the aqueous solution is close to 99%.

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Abstract

The invention discloses an attapulgite acidifying modification method. The method comprises the following steps: thermally activating the attapulgite, then soaking the activated attapulgite in an inorganic acid, washing the attapulgite with water until the attapulgite turns neutral, drying, grinding, and sieving so as to obtain the finished product. The method can remove the impurities in the channels of attapulgite, unclogs the channels, and improves the property of attapulgite such as adsorbing performance, decoloring performance, and the like.

Description

technical field [0001] The invention relates to the technical field of improving properties of chemical substances, in particular to an attapulgite acidification modification method. Background technique [0002] Attapulgite is a kind of hydrous magnesium-aluminosilicate clay mineral with layer chain structure, which belongs to sepiolite group in mineralogy. The theoretical chemical formula of attapulgite is: Mg 5 Si 8 o 20 (OH) 2 (OH 2 ) 4 4H 2 O, its structure has been proposed by Bradley in 1940. , the theoretical chemical composition mass fraction of attapulgite is: SiO 2 56.96%, (Mg, Al, Fe)O 23.83%, H 2 O 19.21%. The basic structure of attapulgite is divided into three levels: ① The basic structural unit is a rod-shaped or fibrous single crystal, the diameter of the rod crystal is on the order of 0.01 μm, and the length can reach 0.1-1 μm; ② The rod crystal formed by the parallel aggregation of single crystals ③ various aggregates formed by the accumulation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F1/62
Inventor 宋时衡
Owner 明光市恒大棒粉厂
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