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Method for preparing modified bentonite through dry process

A bentonite and modification technology is applied in the field of dry preparation of modified bentonite, which can solve the problems of poor ion adsorption and exchange capacity, and achieve the effects of high production efficiency, easy availability of raw materials and stable material properties.

Active Publication Date: 2018-11-23
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the dry modification operation, the contact between bentonite and the modifier is not as sufficient as the wet modification operation, and its ion adsorption and exchange capacity is relatively poor.

Method used

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  • Method for preparing modified bentonite through dry process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] Step 1: Bentonite raw material preparation. The mined raw materials are simply manually selected, stones, sticks and other mechanical impurities are removed, crushed by jaw crushers and ball mills, with a particle size of 100 mesh to 200 mesh, and bentonite raw material A is obtained.

[0029] Step 2: Inorganic modifier preparation. (1) Sodium-based modifier. Industrial sodium carbonate or sodium bicarbonate is added according to mass percentage wt 0.1% to 10%. (2) aluminum pillar propping agent aluminum chlorohydrate [containing polyaluminium, Al 2 (OH)nCl 6-n ]. According to the mass percentage of 0.1% to 10%. (3) Magnetic material iron ore powder. Iron ore powder (100-200 mesh) with a TFe content of not less than 50% is added at a mass percentage of 0.5% to 10%. (4) Quartz sand (100-200 mesh). The mass percentage is 0.5% to 5%. (5) Zeolite (100-200 mesh). The mass percentage is 0.5% to 5%. (6) Nano photocatalyst TiO 2 (Application patent application numbe...

Embodiment approach 2

[0038] Step 1: Bentonite raw material preparation. The mined raw materials are simply manually selected, stones and other mechanical impurities are removed, crushed by jaw crushers and ball mills, with a particle size of 100 mesh to 200 mesh, and bentonite raw material A is obtained.

[0039] Step 2: Inorganic modifier preparation. (1) Sodium-based modifier. Sodium carbonate + sodium bicarbonate (1:1 ratio), added according to the mass percentage wt 0.1% ~ 10%. (2) Aluminum pillar proppant. Aluminum carbonate + aluminum chloride hydrate (1:2 ratio). According to the mass percentage of 0.1% to 10%. (3) Magnetic material iron ore powder. Add iron ore powder (100-200 mesh) with TFe content not less than 50% according to the mass percentage of 0.5%-10%. (4) Quartz sand (no more than 100 mesh). The mass percentage is 0.5% to 5%. (5) Zeolite (100-200 mesh). The mass percentage is 0.5% to 5%. (6) Nano photocatalyst TiO 2 (Application patent application number is 2009101110...

Embodiment approach 3

[0048] Step 1: Bentonite raw material preparation. The mined raw materials are simply manually selected, stones and other mechanical impurities are removed, crushed by jaw crushers and ball mills, with a particle size of 100 mesh to 200 mesh, and bentonite raw material A is obtained.

[0049] Step 2: Inorganic modifier preparation. (1) Sodium-based modifier. The industrial sodium-based modifier sodium carbonate + sodium bicarbonate + sodium sulfate (1:1:1 ratio) is added according to the mass percentage wt of 0.1% to 10%. (2) Aluminum proppant (1:1:1 ratio). According to the mass percentage of 0.1% to 10%. (3) Magnetic material iron ore powder. Add iron ore powder (100-200 mesh) with TFe content not less than 50% according to the mass percentage of 0.5%-10%. (4) Quartz sand (no more than 100 mesh). The mass percentage is 0.5% to 5%. (5) Zeolite (100-200 mesh). The mass percentage is 0.5% to 5%. (6) Nano photocatalyst TiO 2 (Application patent application number is 20...

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Abstract

The invention belongs to the technical field of preparation of environment protection materials and in particular relates to a method for preparing modified bentonite through a dry process. The methodcomprises the following steps: sorting a dried bentonite raw material A and removing impurities; then crushing and sieving; adding an inorganic modifying agent and sufficiently stirring and uniformlymixing to obtain a material B; then adding an organic modifying agent and sufficiently stirring and uniformly mixing to obtain a material C; pressing in a grinding tool; sintering, molding and cooling to obtain a finished product, wherein a gas pressurizing pump is used for carrying out a plurality of times of pressurizing-decompression operation in a sintering process. The method provided by theinvention has the advantages of short technological flow, high production efficiency, easiness for obtaining the raw material, low cost, simplicity in operation and stable material performance. The finished product has no toxin and no harms and is environmentally friendly, and is suitable for treating heavy metal pollutants and solid wastes in water and soil to realize the aim of environment protection.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental protection materials, and in particular relates to a dry method for preparing modified bentonite. Background technique [0002] Bentonite is a natural mineral with montmorillonite as the main component. It has a large specific surface area and has certain adsorption properties. It is also rich in domestic mineral resources and low in price. There are magnesium, potassium, sodium, copper and other cations in the layered structure formed by the montmorillonite unit cell, and the interaction between these cations and the montmorillonite unit cell is not strong, and it is easily replaced by other cations, so it has good ion exchange performance. Bentonite has strong hygroscopicity and can absorb water less than 20 times its own volume and expand to more than 30 times. In water medium, it can be dispersed into a colloidal suspension with certain lubricity, thixotropy and viscosit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F1/42C02F1/72C02F101/20C02F101/30
CPCB01J20/12B01J20/3064C02F1/288C02F1/42C02F1/725C02F2101/20C02F2101/30C02F2305/10
Inventor 李静玲刘学平余根鼎陈友根陈荣国林恬彭蕾倪柳芳
Owner FUJIAN UNIV OF TECH
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