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Preparation method and application of attapulgite clay adsorption particles

A technology of attapulgite clay and adsorption particles, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, and can solve problems such as easy agglomeration and limited adsorption performance, and increase pore volume and specific surface area , increase the pore volume and specific surface area, and the effect of strong adsorption capacity

Inactive Publication Date: 2020-10-13
MINGGUANG FEIZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the attapulgite clay raw material has a large amount of impurities in its composition structure and is prone to agglomeration, so its original adsorption performance is limited, so it is necessary to purify and modify the raw material

Method used

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  • Preparation method and application of attapulgite clay adsorption particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Reclaiming pretreatment

[0040] Take attapulgite clay from Guanshan, Jianxi Town, Mingguang City (hereinafter referred to as attapulgite), spread it flat on the site and dry it for at least 3 days (excluding rainy and snowy days), and then roll, crush, and Magnetic separation, sieving (vibration sieving), and powder grinding (ball milling) to a particle size below 1 mm for later use.

[0041] Step 2: First-level high-temperature roasting activation treatment

[0042] Put the attapulgite obtained in step 1 in a muffle furnace, and perform gradient roasting treatment at 120±5°C, 150±5°C, 180±5°C, 210±5°C, and 240±5°C for 25 minutes and 30 minutes respectively , 40min, 50min, 60min, air-cooled with the furnace after roasting;

[0043] Step 3: Pulp milling + primary acid treatment

[0044] Add water to the attapulgite obtained in step 2 to prepare a slurry with a concentration of 32.5wt%, and add a nitric acid solution with a concentration of 2.5mol / L to mix, wher...

Embodiment 2

[0059] Step 1: Reclaiming pretreatment

[0060] Take attapulgite clay from Guanshan, Jianxi Town, Mingguang City (hereinafter referred to as attapulgite), spread it flat on the site and dry it for at least 3 days (excluding rainy and snowy days), and then roll, crush, and Magnetic separation, sieving (vibration sieving), and powder grinding (ball milling) to a particle size below 1 mm for later use.

[0061] Step 2: First-level high-temperature roasting activation treatment

[0062] Put the attapulgite obtained in step 1 in a muffle furnace, and perform gradient roasting treatment at 120±5°C, 150±5°C, 180±5°C, 210±5°C, and 240±5°C for 25 minutes and 30 minutes respectively , 40min, 50min, 60min, air-cooled with the furnace after roasting;

[0063] Step 3: Pulp milling + primary acid treatment

[0064] Add water to the attapulgite obtained in step 2 to prepare a slurry with a concentration of 34.5wt%, and add a nitric acid solution with a concentration of 3.0mol / L to mix, wh...

Embodiment 3

[0079] Step 1: Reclaiming pretreatment

[0080] Take attapulgite clay from Guanshan, Jianxi Town, Mingguang City (hereinafter referred to as attapulgite), spread it flat on the site and dry it for at least 3 days (excluding rainy and snowy days), and then roll, crush, and Magnetic separation, sieving (vibration sieving), and powder grinding (ball milling) to a particle size below 1 mm for later use.

[0081] Step 2: First-level high-temperature roasting activation treatment

[0082] Put the attapulgite obtained in step 1 in a muffle furnace, and perform gradient roasting treatment at 120±5°C, 150±5°C, 180±5°C, 210±5°C, and 240±5°C for 25 minutes and 30 minutes respectively , 40min, 50min, 60min, air-cooled with the furnace after roasting;

[0083] Step 3: Pulp milling + primary acid treatment

[0084] Add water to the attapulgite obtained in step 2 to prepare a slurry with a concentration of 36.5wt%, and add a nitric acid solution with a concentration of 3.5mol / L to mix, wh...

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Abstract

The invention discloses a preparation method and application of attapulgite clay adsorption particles, and relates to the technical field of attapulgite clay modification. The preparation method comprises the following steps: 1, taking materials for pretreatment; 2, performing primary high-temperature gradient roasting activation treatment; 3, pulping, grinding and selecting, and carrying out primary acidizing treatment; 4, carrying out secondary high-temperature gradient calcination activation treatment; 5, carrying out secondary acidification treatment; 6, carrying out surface active treatment; 7, granulating. Compared with the prior art, the attapulgite purification and modification process disclosed by the invention is more practical and efficient than previous ones, and particularly,a plurality of modification methods are combined for attapulgite in local Mingguang City, so that the purity of the attapulgite clay obtained by treatment and the adsorption capacity of adsorption particles prepared by extension are greatly improved.

Description

technical field [0001] The invention relates to the technical field of attapulgite clay modification, in particular to a preparation method and application of attapulgite clay adsorption particles. Background technique [0002] Attapulgite clay (ATP for short) refers to a clay mineral mainly composed of attapulgite (palygorskite), which belongs to the sepiolite group in mineralogy. Attapulgite rod crystal is a kind of natural one-dimensional inorganic nanomaterial with wide source of raw materials and low preparation cost. Since the inside of the single crystal is a channel structure, many parallel tunnel voids are naturally formed between the parallel nano single crystal fibers, so the volume of the voids in the micron-level attapulgite accounts for more than 30% of the total particle volume, and the interior has a huge specific area. Therefore, attapulgite is widely used in adsorbents, catalysts and carriers, drilling mud thickeners, binders, feed additives, etc. Attapulg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C01B33/40C01B33/44C02F1/28C02F101/30
CPCB01J20/12B01J2220/4806B01J2220/4812C01B33/40C01B33/44C02F1/281C02F2101/308
Inventor 顾文宇吴佳蕾胡睿
Owner MINGGUANG FEIZHOU NEW MATERIAL
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