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Preparing process for organic modified bentonite composite material

A technology of composite materials and bentonite, which is applied in the direction of chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of large amount of modified bentonite, large dosage, large amount of sludge, etc., and achieve low cost of wastewater treatment and low sedimentation Fast speed and large floc effect

Inactive Publication Date: 2009-03-11
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are still some problems, and these problems are mainly manifested in: the amount of modified bentonite is large, and the water treatment effect is not ideal. For example, when it is used for wastewater decolorization, the decolorization rate is 80-90%, and the amount of modified bentonite should be used. 0.5~1.0g / L[1,2], the dosage is larger, and more sludge is produced, which brings inconvenience to the post-treatment of sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the temperature range of 75-85°C, 350 parts of formaldehyde and 150 parts of dicyandiamide were subjected to hydroxylation reaction in a reactor for 1.0-1.5 hours, and then under the action of a catalyst, polycondensation reaction was carried out for 40-80 minutes to obtain Dicyandiamide - a polycondensate of formaldehyde. Take 30 parts of sodium bentonite in a reaction kettle, add deionized water to make a suspension with a mass ratio of 8%, stir evenly, add 8 parts of formaldehyde-dicyandiamide polycondensate, and shake at 60°C for 10-12 hours, after the reaction is over, cool to 30°C to 40°C, then suction filter, wash, dry at 95°C, crush and pass through a 100-mesh sieve to obtain the product.

Embodiment 2

[0020] Take 30 parts of sodium bentonite in a reaction kettle, add deionized water to make a suspension with a mass ratio of 10%, stir evenly, add 10 parts of formaldehyde-dicyandiamide polycondensate, and shake at a constant temperature for 6 to 8 hours at 70°C , cooled to 25°C to 35°C, suction filtered, washed, dried at 100°C, crushed and passed through a 150 to 200 mesh sieve to obtain the product. The method for producing formaldehyde-dicyandiamide ammonium polycondensate here is the same as embodiment one.

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Abstract

The present invention discloses preparation process of organic modified bentonite composite material. The organic modified bentonite composite material is prepared with bentonite, and through adding water via stirring, adding polycondensate of dicyandiamine and formaldehyde to produce constant temperature vibration reaction, cooling to normal temperature, suction filtering, washing, drying, crushing and sieving. The organic modified bentonite composite material is used in treating dyeing effluent, and has the advantages of high efficiency, small consumption, fast deposition speed, low treating cost, etc.

Description

technical field [0001] The invention relates to a preparation method of a novel modified organic bentonite composite material. Background technique [0002] Bentonite is an aluminosilicate with montmorillonite as the main mineral component, and its structure is a 2:1 crystal structure composed of two layers of silicon-oxygen tetrahedron sandwiching a layer of aluminum-oxygen octahedron. Since part of the Al(III) in the octahedron is replaced by Mg(II), and part of the Si(IV) in the tetrahedron is replaced by Al(III), the bentonite layered structure has a permanent negative charge, containing Ca 2+ , Mg 2+ 、Na + 、K + Such as exchangeable cations, can generate various modified or modified products through the exchange reaction with other cations. The most prominent features of the modified bentonite are large layer spacing, strong lipophilic and hydrophobic properties, and good adsorption to organic matter. Therefore, it can be applied to the treatment of industrial waste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/26C01B33/44
Inventor 董申伟任海贝李明玉
Owner JINAN UNIVERSITY
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