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Environment-friendly modified bentonite and preparation method thereof

An environmentally friendly, bentonite technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of poor dehydration effect of flocs, affecting practical application, slow solid-liquid separation speed of bentonite, etc., and achieve clarification effect. Significantly, speed up the modification reaction speed, good clarification effect

Inactive Publication Date: 2007-10-24
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY +1
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Problems solved by technology

However, in natural bentonite, due to the extremely strong hydrophilicity of the surface silicon-oxygen structure and the hydrolysis of a large number of exchangeable cations between the layers, there is usually a thin water film on the surface, which limits its application in aqueous solutions; in addition, The solid-liquid separation speed of bentonite is slow, and the dehydration effect of flocs is poor, which also affects its practical application.

Method used

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  • Environment-friendly modified bentonite and preparation method thereof

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Embodiment Construction

[0025] The present invention will be described in detail below with reference to the accompanying drawings.

[0026] Synthesis principle: natural soil is a layered aluminosilicate, and the layers are combined by electrostatic interaction. There are extensive isomorphic substitutions in tetrahedrons and octahedrons. Si in tetrahedrons 4+ Often referred to as Al 3+ Alternative, Al in octahedron 3+ Often referred to as Mg 2+ , Fe 3+ , Fe 2+ 、Ni 2+ , Li + etc. to generate weak negative charges between the layers, thus having the ability to adsorb certain cations. The chitosan molecule contains more amino groups, and when it is dissolved in an acidic solution, it has a positive charge. In this way, bentonite and chitosan can rely on the attraction of positive and negative charges to combine together. Since the positively charged chitosan molecular chain is very large, it may not completely enter the clay layer, and a part may remain outside. This can be confirmed by X-ray ...

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Abstract

The invention discloses an environment-friendly modified alta-mud and making method, which comprises the following steps: adopting natural polysaccharide without toxicity and harm such as chitosan as modifier to modify sodium-based alta-mud; disposing original mud; allocating chitosan acetic solution; weighing 50-60ml chitosan solution with density at 0. 5-1. 0% and diacetyl degree at 90%; allocating 50g alta-mud into paste-shaped material; stewing; infiltrate the alta-mud completely; placing the paste-shaped material into microwave oven; heating to dry; grinding finely; sieving in the screen at 0. 16mm; obtaining the product with low price, good property and environment friendly without any polluting; fitting for disposing industrial waste water, manufacturing drug and food industry.

Description

technical field [0001] The invention relates to a modified bentonite and a preparation method thereof, in particular to a new modified bentonite which is environmentally friendly, free from any pollution, non-toxic and harmless, and a preparation method thereof. Background technique [0002] Bentonite is a clay mineral widely distributed in nature and belongs to non-metallic minerals. China's bentonite mineral resources are very rich, the reserves rank first in the world, accounting for 60% of the world's total, the estimated resources are more than 7 billion tons, and it is characterized by wide distribution, shallow burial, easy mining and complete varieties. Bentonite and its purified and modified products have some superior characteristics to varying degrees. These characteristics mainly include swelling, hydrophilicity (or lipophilicity, such as organic bentonite), adsorption, cation exchange, catalytic activity, dispersibility, Suspension, adhesion, thixotropy, stabil...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44
Inventor 邵红马勇
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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