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Production process of nano rod-like active silica with attapulgite and clay

A technology of attapulgite clay and activated silica, applied in the direction of silica, fibrous fillers, etc., to achieve the effects of reduced raw material consumption, reduced production costs, and excellent physical and chemical properties

Inactive Publication Date: 2004-06-23
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to avoid the problems existing in the above-mentioned prior art, and to provide a kind of attapulgite clay production with less raw material consumption, simple process, low production cost, and better physical and chemical properties of the product. Nanorod-shaped activated silica method

Method used

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  • Production process of nano rod-like active silica with attapulgite and clay
  • Production process of nano rod-like active silica with attapulgite and clay
  • Production process of nano rod-like active silica with attapulgite and clay

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Embodiment Construction

[0010] In this example, attapulgite clay is used as raw material to produce nano-rod-shaped active silica by one-step direct acid dissolution method.

[0011] figure 1 and figure 2 The morphology and composition of nanorod-shaped active silica are shown, respectively. The basic principle is that the octahedral cations Mg, Al, and Fe in the attapulgite structure can be completely dissolved under the action of strong acid, while the SiO as the silica backbone of attapulgite 2 The crystal morphology of attapulgite is preserved, resulting in the production of nanorod-shaped activated silica (silica).

[0012] The specific implementation of this embodiment is preferably that the attapulgite content in the attapulgite clay is not less than 60%, and minerals such as quartz and feldspar are not more than 5%. The less the content of quartz and feldspar is, the better, and the less content of dolomite can reduce the acid consumption of chemical reactions.

[0013] The acid used in ...

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Abstract

The production process of nano rod-like active silica is one acid dissolving process with attapulgite and clay as material. The positive effects of the present invention include elimination of high temperature alkali dissolving process, reduced material consumption and lowered production cost. Compared with traditional technological process, the nano rod-like active silica product of the present invention has ever high physical and chemical characteristics, including original concentration, dispersive performance and shape features. The present invention has wide application value.

Description

Technical field: [0001] The invention relates to the technical fields of deep processing of non-metallic mineral resources and inorganic chemical industry. More specifically, the invention relates to a method for producing nanorod-shaped active silicon dioxide from attapulgite clay. Background technique: [0002] Activated silica (white carbon black) is white amorphous fine powder, light in weight, specific gravity 2.319-2.653, melting point 1750°C. It has high insulation, insoluble in water and acid, soluble in caustic soda and hydrofluoric acid. Activated silica is used as a reinforcing filler for natural rubber and synthetic rubber, and can also be used as a plastic filler, lubricant, insulating material, paint anti-settling agent, synthetic resin filler, ink thickener, soft material for vehicles and metals. Quality polishing agent, paint matting agent. Activated silica is a widely used inorganic chemical material. At present, the conventional preparation method is to...

Claims

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Application Information

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IPC IPC(8): C01B33/113C09C1/28
Inventor 陈天虎
Owner HEFEI UNIV OF TECH
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