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Method for preparing hypochlorite white mud-based adsorbent for deep removal of complex chromium

An adsorption material and complex state technology, which is applied in the field of preparation of hypochlorite lime-based adsorption materials, can solve problems such as inability to dispose of, and achieve the effects of low cost, simple operation and improved adsorption performance.

Active Publication Date: 2019-01-11
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the industry stacks them in the factory area and cannot be disposed of
Therefore, the technology for the eff

Method used

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  • Method for preparing hypochlorite white mud-based adsorbent for deep removal of complex chromium
  • Method for preparing hypochlorite white mud-based adsorbent for deep removal of complex chromium
  • Method for preparing hypochlorite white mud-based adsorbent for deep removal of complex chromium

Examples

Experimental program
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Example Embodiment

[0024] Example:

[0025] (1) Hypochlorine white mud is dried at 60°C to constant weight, ground and sieved to 100 mesh; 100g of it is added to 200mL of 10% sulfuric acid (H 2 SO 4 ), pickled for 2 hours, filtered to obtain the filtrate;

[0026] (2) Under stirring conditions, add cetyltrimethylammonium bromide (CTAB) 6g to the filtrate in step (1), ultrasonically disperse for 30min; then add ethylenediaminetetraacetic acid (EDTA), according to the mass ratio ( CTAB:EDTA) 2:5;

[0027] (3) Add 0.2g of conductive graphene dispersion (concentration 5mg / ml, conductive graphene sheet diameter 10nm, conductivity 1000S / cm) into 200ml ethanol solution, ultrasonically disperse for 30min; under stirring condition, add to step ( 2) In the obtained product, stir at high speed for 30 minutes, add ball milling beads for ball milling (the particle size of the ball milling beads is 50 μm, the ball milling speed is 100 r / min, and the ball milling time is 30 minutes);

[0028] (4) Under sti...

Example Embodiment

[0031] Example 2:

[0032] (1) Hypochlorite white mud is dried at 60°C to constant weight, ground and sieved to 200 mesh; 100g of it is added to 200mL of 10% sulfuric acid (H 2 SO 4 ), pickled for 2 hours, filtered to obtain the filtrate;

[0033] (2) Under stirring conditions, add cetyltrimethylammonium bromide (CTAB) 7g to the filtrate in step (1), ultrasonically disperse for 30min; then add ethylenediaminetetraacetic acid (EDTA), according to the mass ratio ( CTAB:EDTA) 4:5;

[0034] (3) Add 0.4g of conductive graphene dispersion (concentration 5mg / ml, conductive graphene sheet diameter 10nm, conductivity 1000S / cm) into 200ml ethanol solution, ultrasonically disperse for 30min; under stirring condition, add to step ( 2) In the obtained product, stir at high speed for 30 minutes, then add ball milling beads for ball milling (the particle size of the ball milling beads is 50 μm, the ball milling speed is 200 r / min, and the ball milling time is 60 minutes);

[0035] (4) Un...

Example Embodiment

[0038] Example 3:

[0039] (1) Hypochlorine white mud is dried at 60°C to constant weight, ground and sieved to 300 mesh; 100g of it is added to 200mL of sulfuric acid with a mass concentration of 20% (H 2 SO 4 ), pickled for 4 hours, filtered to obtain the filtrate;

[0040] (2) Under stirring conditions, add cetyltrimethylammonium bromide (CTAB) 8g to the filtrate in step (1), and ultrasonically disperse for 60min; then add ethylenediaminetetraacetic acid (EDTA), according to the mass ratio ( CTAB:EDTA) 6:5;

[0041] (3) Add 0.6 g of conductive graphene dispersion (concentration 5 mg / ml, conductive graphene sheet diameter 1 μm, conductivity 1200 S / cm) into 200 ml ethanol solution, ultrasonically disperse for 60 min; under stirring conditions, add to step ( 2) In the obtained product, stir at high speed for 60 minutes, add ball milling beads for ball milling (ball milling beads particle size 100 μm, ball milling speed 300r / min, ball milling time 90 minutes);

[0042] (4) Un...

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Abstract

The invention belongs to the field of solid refuse resource utilization, and especially relates to a method for preparing a hypochlorite white mud-based adsorbent for deep removal of complex chromium.The method comprises the following steps: (1) drying the hypochlorite white mud to a constant weight, grinding and sieving the material, performing acid leaching and filtering to obtain a filtrate; (2) adding cetyl trimethyl ammonium bromide to the filtrate in the step (1), and performing ultrasonic dispersing; further adding ethylenediamine traacetic acid; (3) adding the conductive graphene dispersion liquid to an ethanol solution, and performing ultrasonic dispersing; under stirring condition, adding the material to the product obtained in the step (2) and stirring the material, and performing ball milling; (4) adding graphene oxide dispersion liquid to the product obtained in the step (3), and continuing ultrasonic dispersion; and (5) performing centrifugation on the liquid obtained inthe step (4), performing spray drying, and crushing the material by air flow to obtain the target product hypochlorite white mud-based adsorbent. The method has simple operation, the target product complex chromium has high adsorption rate, and the hypochlorite white mud waste residue can be effectively solved.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, and in particular relates to a method for preparing a hypochlorite-based adsorption material for deep removal of complexed chromium. Background technique [0002] At present, the production process of titanium dioxide is only sulfuric acid method and chlorination method, but the prices of the finished products produced by the two are several thousand (per ton). Titanium dioxide produced by the sulfuric acid method is not only of low value, but also has narrow uses. Chlorination production has the advantages of less waste, good product quality and uniform and controllable particle size. Chlorination titanium dioxide production process is mainly divided into three parts: chlorination, oxidation and post-treatment section. Hypochlorine white mud is a solid-liquid mixture produced after alkali leaching of the tail gas of the chlorination process. After precipitation, plate and fra...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/20C02F1/28C02F101/20C02F101/22C02F101/30C02F103/24C02F103/30
CPCB01J20/06B01J20/20C02F1/28C02F1/281C02F1/283C02F2101/20C02F2101/22C02F2101/308C02F2103/24C02F2103/30
Inventor 鄂涛马丹杨姝宜刘琳邢锦娟李莹邢振强肖鑫宇
Owner BOHAI UNIV
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