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Environment-friendly bentonite adsorbent and preparation method thereof

A technology of bentonite and adsorbent, which is applied in the field of materials, can solve the problems of poor adsorption performance of bentonite, and achieve the effects of improving adsorption performance, increasing grafting rate, and increasing bulk density

Inactive Publication Date: 2017-11-07
重庆卡美伦科技有限公司合川分公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an environmentally friendly bentonite adsorbent and its preparation method, which aims to improve the existing problem of poor adsorption performance of bentonite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The preparation method of above-mentioned environmental protection bentonite adsorbent, it comprises:

[0036] Calcined bentonite and microbeads; mix the calcined product with partially hydrolyzed polyacrylamide, chitosan, starch, cetyltrimethylammonium bromide and initiator to obtain a mixture, and place the mixture at 90-110°C After reacting for 1-2 hours, it was dried and pulverized.

[0037] In other embodiments of the present invention, after adding the initiator to carry out the reaction, it also includes adding an emulsifier to the reacted product for emulsification, and then vacuum drying.

[0038] The purpose of calcining bentonite and microbead particles is to make the water and other easily lost molecules inside the bentonite lose during the calcining process, and the calcined product is mixed with other substances to undergo a cross-linking reaction. During the cross-linking reaction, some branched chains extend into the interior of bentonite and microbead ...

Embodiment 1

[0049] This embodiment provides an environmentally friendly bentonite adsorbent, which is mainly prepared through the following steps:

[0050] Weigh raw materials:

[0051]60g of bentonite, 7g of chitosan, 4g of starch, 4g of partially hydrolyzed polyacrylamide, 0.7g of cetyltrimethylammonium bromide, and 11g of microbeads with a particle size of 0.1 μm. The molecular weight of partially hydrolyzed polyacrylamide is 300×10 4 -1000×10 4 g / mol, the degree of hydrolysis of the polymer is 17%-26%.

[0052] Calcined bentonite and microbeads; mix the calcined product with partially hydrolyzed polyacrylamide, chitosan, starch, cetyltrimethylammonium bromide and initiator to obtain a mixture, and place the mixture at 90°C for reaction After 2 hours it was dried and pulverized.

Embodiment 2

[0054] This embodiment provides an environmentally friendly bentonite adsorbent, which is mainly prepared through the following steps:

[0055] Weigh raw materials:

[0056] 65g of bentonite, 13g of chitosan, 5g of starch, 4g of partially hydrolyzed polyacrylamide, 1.5g of cetyltrimethylammonium bromide, and 15g of microbeads with a particle size of 0.1 μm-5 μm. The molecular weight of partially hydrolyzed polyacrylamide is 300×10 4 -1000×10 4 g / mol, the degree of hydrolysis of the polymer is 17%-26%.

[0057] Calcined bentonite and microbeads; mix the calcined product with partially hydrolyzed polyacrylamide, chitosan, starch, cetyltrimethylammonium bromide and initiator to obtain a mixture, and place the mixture at 110°C for reaction Dry and pulverize after 1-2 hours.

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Abstract

The invention relates to the field of materials, in particular to an environment-friendly bentonite adsorbent and a preparation method thereof. The environment-friendly bentonite adsorbent is prepared from, by weight, 60-75 parts of bentonite, 7-13 parts of chitosan, 4-5 parts of starch, 4-5 parts of partially hydrolyzed polyacrylamide, 0.7-1.5 parts of cetyl trimethyl ammonium bromide and 11-15 parts of microbead particles with the particle size of 0.1-5 microns. Through the modification of the micro-bead particles and the bentonite by various organic substances, the adsorbent with a good adsorption property is finally prepared. The partially hydrolyzed polyacrylamide can be effectively grafted onto the starch to increase the grafting rate of nonionic groups on the starch. The microbead particles are filled among bentonite particles. Through the modification of the outer surfaces of the micro-bead particles and bentonite by the organic substances, the surface activity and micro-structures of interlayers are changed to improved the adsorption property of the adsorbent.

Description

technical field [0001] The invention relates to the field of materials, in particular to an environmentally friendly bentonite adsorbent and a preparation method thereof. Background technique [0002] Bentonite is a 2:1 layered clay mineral with montmorillonite as the main component. Its large surface area makes it have strong adsorption capacity and ion exchange capacity. In recent years, bentonite has been used as an adsorbent for To deal with various pollutions, some successful applications have been achieved in the improvement of soil and the treatment of polluted wastewater. [0003] In natural bentonite, the silicon-oxygen structure has extremely strong hydrophilicity and the hydrolysis of a large number of exchangeable cations between layers makes it usually have a thin water film on the surface, which cannot effectively adsorb hydrophobic organic pollutants. [0004] Accordingly, the inventor has invented an environmentally friendly bentonite adsorbent. Contents o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 张占华关雪松
Owner 重庆卡美伦科技有限公司合川分公司
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