Method for producing sodium bentonite with calcium bentonite

A technology of sodium-based bentonite and calcium-based bentonite, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., to achieve the effects of simple and easy process, convenient recycling and use, and good modification effect

Active Publication Date: 2008-08-20
INNER MONGOLIA UNIVERSITY
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  • Abstract
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Problems solved by technology

Moreover, the use of flocculation dehydration method effectively solves the problem of difficult dehydration in wet modificatio...

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  • Method for producing sodium bentonite with calcium bentonite
  • Method for producing sodium bentonite with calcium bentonite
  • Method for producing sodium bentonite with calcium bentonite

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Embodiment Construction

[0027] The present invention will be described in detail with a specific embodiment below:

[0028] According to the technical process of the present invention, the natural calcium-based bentonite in Xinghe County, Inner Mongolia is purified and modified by sodium, and the specific steps are:

[0029] 1. Mix 1g of dispersant (NaPO 3 ) 6 Add 800g of pure water, stir to dissolve, add 200g of calcium-based bentonite ore coarsely crushed to a particle size of about 1cm into the above solution, soak and disintegrate, then stir and mix well.

[0030] 2. Add 8g of modifier Na 2 CO 3 After making a saturated aqueous solution, add it to the above-mentioned mixing system, and then stir to make it fully mix and age for 18 hours.

[0031] 3. After discarding the large particles of impurities in the lower layer, heat the upper layer system to 90°C, stir vigorously at this temperature and replenish water in time to make the system fully react for 1 hour.

[0032] 4. After standing stil...

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Abstract

The invention discloses a method for preparing na-bentonite using ca-bentonite, the process of which is that pulverized ca-bentonite raw mine soil is added into the water solution which the dispersing agent (NaPO3)6 is already added, and are immersed, stirred and mixed evenly, then the modifier Na2CO3 is added to the saturated water solution; finally the working procedure of stirring and aging, heating and modifying, high speed dispersion, siphon and impurity removal, centrifugally purifying, flocculating and dewatering are performed in order to obtain the na-bentonite with high quality; the purifying and the modifying working procedure are performed at the same time, and the purifying operation passes through the whole working flow, thus na-bentonite with high quality and high purity comprising very high content of montmorillonite can be obtained. With flocculating and dewatering, the preparing method of the invention has the advantages that the problem of dewatering difficulty for wet modifying is effectively resolved, and the water after flocculating and dewatering is very convenient for recovery, thus the water consumption, the energy consumption and the processing time during drying in the wet modifying process are greatly decreased.

Description

technical field [0001] The invention relates to a non-metallic bentonite raw ore deep processing technology, in particular to a method for preparing sodium-based bentonite by synchronously modifying and purifying natural calcium-based bentonite by artificial wet method. Background technique [0002] Bentonite has good expansibility, adhesiveness, adsorption, thixotropy, plasticity, lubricity, and cation exchange properties. It is one of the clay minerals with a wide range of applications and high economic value. It has been widely used Used in metallurgy, machinery, petroleum, chemical industry, medicine, environmental governance and other fields, it is called "clay with a thousand uses". Bentonite is a clay mainly containing montmorillonite minerals. The montmorillonite crystal is composed of two layers of silicon-oxygen tetrahedron sandwiching a layer of aluminum (magnesium) oxygen (hydrogen oxygen) octahedron, which belongs to the 2:1 type layered silicon In aluminate, a...

Claims

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Application Information

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IPC IPC(8): C01B33/38
Inventor 苏海全张兵兵王宴秋
Owner INNER MONGOLIA UNIVERSITY
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