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Anion adsorbent and preparation method thereof

An anion and adsorbent technology, which is applied in the field of anion adsorbents in industrial sewage, can solve the problems of low adsorption efficiency, and achieve the effect of simple preparation scheme, good adsorption performance, and easy industrialization

Active Publication Date: 2020-02-04
ZHEJIANG RENHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the market, many anion adsorbents, including ion exchange resins, are not very selective for some specific anions, resulting in low adsorption efficiency

Method used

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  • Anion adsorbent and preparation method thereof
  • Anion adsorbent and preparation method thereof
  • Anion adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 10 g of high-quality sodium-based montmorillonite and 90 g of water to make slurry, disperse at room temperature at high speed for 24 hours, and obtain smectite slurry. Add 1000g of polydiallyldimethylammonium chloride (PDDA) into the montmorillonite slurry, continue to disperse at a high speed under normal temperature conditions, centrifuge and wash three times with water after 24 hours, place it in a dryer at 60°C for drying, and grind Pass through a 200-mesh sieve to obtain an anion adsorbent.

[0026] The application effect is shown in the table below:

[0027] Add the anion adsorbent to the anion wastewater, stir and adsorb for 4 hours, and the adsorption is balanced. The anionic adsorbent is separated by centrifugation. To detect the concentration of anions in the supernatant. The results showed that after the treatment with anion adsorbent, the concentration of anion substances in sewage decreased significantly.

[0028]

Embodiment 2

[0030] Take 20g of high-quality sodium-based montmorillonite and 180g of water to make slurry, disperse at a high speed at room temperature for 24 hours, and obtain montmorillonite slurry. Add 2400g of polydiallyldimethylammonium chloride (PDDA) into the montmorillonite slurry, continue to disperse at a high speed under normal temperature conditions, centrifuge and wash three times with water after 24 hours, place it in a dryer at 60°C for drying, and grind Pass through a 200-mesh sieve to obtain an anion adsorbent.

[0031] The application effect is shown in the table below:

[0032] Add the anion adsorbent to the anion wastewater, stir and adsorb for 4 hours, and the adsorption is balanced. The anionic adsorbent is separated by centrifugation. To detect the concentration of anions in the supernatant. The results showed that after the treatment with anion adsorbent, the concentration of anion substances in sewage decreased significantly.

[0033]

Embodiment 3

[0035] Take 30g of high-quality sodium-based montmorillonite and 270g of water to make slurry, and disperse at high speed for 24 hours at room temperature to obtain montmorillonite slurry. Add 4500g of polydiallyldimethylammonium chloride (PDDA) into the montmorillonite slurry, continue to disperse at a high speed under normal temperature conditions, centrifuge and wash three times with water after 24 hours, place it in a dryer at 60°C for drying, and grind Pass through a 200-mesh sieve to obtain an anion adsorbent.

[0036] The application effect is shown in the table below:

[0037] Add the anion adsorbent to the anion wastewater, stir and adsorb for 4 hours, and the adsorption is balanced. The anionic adsorbent is separated by centrifugation. To detect the concentration of anions in the supernatant. The results showed that after the treatment with anion adsorbent, the concentration of anion substances in sewage decreased significantly.

[0038]

[0039] The above exp...

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Abstract

The invention discloses an anion adsorbent and a preparation method thereof, and belongs to the technical field of environmental protection technologies and chemical engineering. Na-montmorillonite and polydiallyldimethylammonium chloride (PDDA) are adopted as raw materials, and a finished product is prepared through high-speed dispersive stripping, intercalation modification and drying for powderpreparation. The PDDA in the obtained finished product and the stripped montmorillonite are subjected to an intercalation reaction to form a nanocomposite material of a montmorillonite slice layer and a polymer, and the nanocomposite material of the montmorillonite slice layer and the polymer has the good anion waste adsorption ability; and a preparation scheme of the anion adsorbent is simple and easy to implement, industrialization is easy, and the adopted materials can be circularly applied through acid pickling.

Description

technical field [0001] The invention belongs to the technical field of chemical industry or environmental protection, and relates to a water treatment agent and its application. More specifically, the invention is an adsorbent for anions (nitric acid, chromic acid, perchlorate anions) in industrial sewage. Background technique [0002] In water treatment, adsorption is a physical and chemical method. It is an urgent need for the development of the environmental protection industry to develop low-cost, good selectivity, and easy-to-regenerate water treatment adsorbents. In recent years, research on modified montmorillonite adsorbents for water treatment has become one of the hot areas of wastewater treatment. my country is rich in natural bentonite resources, the proven reserves are second only to the United States, ranking second in the world, and the current annual mining volume is 2 million tons. The development of bentonite and modified bentonite water treatment agent h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/12B01J20/30C02F1/28C02F101/16C02F101/22C02F101/12
CPCB01J20/26B01J20/12B01J20/30C02F1/28B01J2220/46C02F2101/163C02F2101/22C02F2101/12
Inventor 俞铁明张有连张蕾张怀滨
Owner ZHEJIANG RENHENG CHEM
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