Preparation method of organic bentonite gel adsorbents

A technology of bentonite and adsorbent, which is applied in the field of preparation of bentonite adsorbent, and can solve the problems of poor permeability, failure to achieve the desired effect of recycling and reuse, loss, etc.

Inactive Publication Date: 2016-01-06
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

[0003] CPC-B is a powder with fine particles, large specific surface area, high adsorption and ion exchange performance, but it has swelling property and poor permeability. It is difficult to separate solid and liquid when using this kind of powder adsorbent for sewage treatment. There is a large amount of loss, and recycling and reuse cannot achieve the desired effect. Therefore, in recent years, powdered adsorbents have been molded and applied to wastewater treatment has become the main research direction

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  • Preparation method of organic bentonite gel adsorbents
  • Preparation method of organic bentonite gel adsorbents
  • Preparation method of organic bentonite gel adsorbents

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with examples.

[0025] Synthesis principle:

[0026] Natural soil is a layered aluminosilicate, and the layers are combined by electrostatic interaction. There are extensive isomorphic substitutions in the tetrahedron and octahedron. Si4+ in the tetrahedron is often replaced by Al3+, and Al3+ in the octahedron is often replaced. It is replaced by Mg2+, Fe3+, Fe2+, Ni2+, Li+, etc., so that a weak negative charge is generated between the layers, so that it has the ability to adsorb certain cations. The organic modifier CPC can be inserted between the sheets of bentonite montmorillonite, which changes the interlayer spacing and specific surface area of ​​bentonite, and improves the adsorption capacity of bentonite. CMC is a non-toxic and environmentally friendly food additive. Using its thickening properties, a single modified organic bentonite CPC-B is made into a thick liquid, and a cross-linking ag...

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Abstract

The invention discloses a preparation method of bentonite composite gel adsorbents and relates to a preparation method of bentonite adsorbents. According to the method, firstly, sodium-based bentonite is modified with cetyl pyridinium chloride (CPC) as a modifying agent; after cetyl pyridinium chloride organic bentonite (CPC-B) is prepared, the CPC-B is secondarily modified through sodium carboxymethyl cellulose (CMC) with AlCl3 as a cross-linking agent, and cetyl pyridinium chloride / sodium carboxymethyl cellulose organic bentonite gel adsorbents (CPC / CMC-B) are prepared. The cetyl pyridinium chloride / sodium carboxymethyl cellulose organic bentonite gel adsorbents (CPC / CMC-B) prepared through the method are good in adsorbing performance and obvious in removing effect, adsorbing operation is easy and convenient, losses are few, the recovery rate is high, and the adsorbents are environment-friendly forming adsorbents with good application prospects.

Description

technical field [0001] The invention relates to a preparation method of a bentonite adsorbent, in particular to a preparation method of an organic bentonite gel adsorbent. Background technique [0002] Bentonite is a widely distributed clay mineral with montmorillonite as the main component. Its unit cell is composed of two layers of Si-O tetrahedron sandwiching a layer of Al-O octahedron, and the oxygen is shared between the tetrahedron and octahedron. Atoms form highly ordered quasi-2-dimensional sheets, so the specific surface area is large, and it has strong adsorption and ion exchange properties. The ability of modified bentonite to remove pollutants in water is tens or even hundreds of times higher than that of natural soil, and it has a good application prospect in wastewater treatment. [0003] CPC-B is a powder with fine particles, large specific surface area, high adsorption and ion exchange performance, but it has swelling property and poor permeability. It is di...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
Inventor 邵红孙晓宇宁志高
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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