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A kind of preparation method and application of film-coated organic bentonite

A technology of bentonite and sodium-based bentonite is applied in the field of preparation of organic bentonite, which can solve the problems of heavy metal ion adsorption efficiency, lack of adsorption capacity, no report on the preparation method, no film coating characteristics, etc., and achieves low cost, convenient operation, Strong adsorption effect

Inactive Publication Date: 2018-09-21
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned prior art is all about the research on the modification of bentonite. However, the above-mentioned modified bentonite does not have the characteristics of coating, and has a lack of adsorption efficiency and adsorption capacity for heavy metal ions.
There is no report about the preparation method of film-coated organically modified bentonite at present

Method used

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  • A kind of preparation method and application of film-coated organic bentonite
  • A kind of preparation method and application of film-coated organic bentonite
  • A kind of preparation method and application of film-coated organic bentonite

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Experimental program
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Effect test

Embodiment 1

[0035] The preparation method of film-coated organic bentonite specifically comprises the following steps:

[0036] Mix 30 g of cetyl trimethyl ammonium bromide, 50 ml of absolute ethanol, and 450 ml of deionized water to obtain mixed solution A; after mixing 30 g of sodium bentonite with 500 ml of mixed solution A, put it in a water bath at 60°C The product was shaken for 2 hours, cooled to room temperature, and the product was centrifuged. It was washed with 10% ethanol solution and deionized water for 1 time. After suction filtration, it was dried in an oven at 80°C and ground through a 200-mesh sieve. The solid part was organic Modified bentonite; evenly mix 2ml tri-n-octylamine and 10ml sulfonated kerosene, shake in a water bath for 30min at room temperature to obtain coating solution B; take 2g organic bentonite and 12ml coating solution B after fully adsorbing, ultrasonically treat for 20min, and age 10 hours, air-dry after centrifugation, and the solid part is the film...

Embodiment 2

[0041] The preparation method of film-coated organic bentonite specifically comprises the following steps:

[0042] Mix 10g of cetyltrimethylammonium bromide, 15ml of absolute ethanol, and 135ml of deionized water to obtain mixed solution A; after 10g of sodium bentonite and 150ml of mixed solution A are mixed uniformly, water bath at 55°C The product was shaken for 3 hours, cooled to room temperature, and the product was centrifuged. It was washed with 10% ethanol solution and deionized water for 1 time. After suction filtration, it was dried in an oven at 90 °C and ground through a 200-mesh sieve. The solid part was organic Modified bentonite; evenly mix 1ml tri-n-octylamine and 6ml sulfonated kerosene, shake in a water bath for 30min at room temperature to obtain coating solution B; take 1g of organic bentonite and 5ml coating solution B after fully adsorption, ultrasonically treat for 25min, and age After 12 hours, air-dry after centrifugation, and the solid part is the fi...

Embodiment 3

[0046] In this embodiment, the composition of the coating liquid is improved, and two kinds of auxiliary agents are added to obtain better effects, which specifically includes the following steps:

[0047] Preparation of film-coated bentonite: Mix 10g of cetyltrimethylammonium bromide, 15ml of absolute ethanol, and 135ml of deionized water to obtain mixed solution A; Shake in a water bath at 55°C for 3 hours, cooled to room temperature, and the product was centrifuged, washed with 10% ethanol solution and deionized water once each, suction filtered, dried at 90°C in an oven, and ground through a 200-mesh sieve , the solid part is the organic modified bentonite; 1ml tri-n-octylamine, 0.5ml ethylenediamine, 0.2ml sorbitan monooleate (Span80) and 6ml sulfonated kerosene are evenly mixed, and shaken in a water bath at room temperature After 30 minutes, the coating solution B was obtained; 1 g of the organic bentonite was fully adsorbed with 5 ml of the coating solution B, ultrason...

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Abstract

The invention discloses a method for preparing film-coated organic bentonite and its application, and belongs to the technical field of organic bentonite preparation. It solves the technical problem of low adsorption rate of organic bentonite in the prior art. The preparation method first mixes cetyltrimethylammonium bromide, absolute ethanol, and deionized water uniformly to obtain a mixed solution A, mixes the sodium-based bentonite and the obtained mixed solution A uniformly, oscillates in a water bath, and cools to room temperature After centrifugation, washing, drying, and sieving, the organic modified bentonite was prepared; then, tri-n-octylamine and sulfonated kerosene were shaken in a water bath at room temperature to obtain coating liquid B; finally, the organic modified bentonite and coating After the solution B is fully absorbed, the coated organobentonite is prepared after steps such as ultrasonication and aging. The film-coated organic bentonite prepared by the invention can be used to treat cadmium-containing wastewater, and has strong adsorption property and large adsorption capacity.

Description

technical field [0001] The invention relates to the technical field of preparation of organic bentonite, in particular to a preparation method and application of a film-coated organic bentonite. Background technique [0002] The treatment of low-concentration heavy metal wastewater is a difficult and complex subject; at the same time, many heavy metals have important uses in industry. Therefore, one of the most effective ways to control heavy metal wastewater pollution is to separate, enrich and recycle them, which not only controls pollution but also saves mineral resources. Separation and enrichment is one of the key steps in heavy metal resource utilization. Since the invention of the liquid membrane separation method by Chinese-American Li N.N. in 1968, liquid membrane technology, especially emulsion liquid membrane technology, has been widely studied, involving heavy metals, rare earths, biochemical substances and many other fields. Liquid membrane separation has the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/32B01J20/34C02F1/28C02F101/20
CPCB01J20/12B01J20/22B01J20/3244B01J20/3295B01J20/34B01J2220/4806B01J2220/4812C02F1/288C02F2101/20
Inventor 周广柱尹鑫王翠珍杨翠英刘晓明程伟玉
Owner SHANDONG UNIV OF SCI & TECH
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