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Preparation method of composite adsorption microspheres of attapulgite cellulose

A composite adsorption, cellulose technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problem of weak mechanical strength of cellulose adsorbent, poor adsorption capacity of attapulgite, and low thermal stability problems, to achieve the effect of improving mechanical strength and thermal stability, conducive to recycling, and stable properties

Active Publication Date: 2016-12-07
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of attapulgite cellulose composite adsorption microspheres, the preparation process is simple and convenient, the ionic liquid solvent used is safe and non-toxic, and the prepared attapulgite cellulose microspheres are porous, dispersible and biocompatible Good thermal stability, strong adsorption capacity, large adsorption capacity, high removal efficiency, stable properties, and easy recovery of pollutants in water; it solves the problem of poor adsorption capacity of attapulgite, difficult recovery, and weak mechanical strength of cellulose adsorbent , low thermal stability, etc. At the same time, there are wide sources of raw materials, low prices, no secondary pollution, full use of cellulose and attapulgite regeneration resources, high practical value, and can be used for advanced treatment of water pollutants, solving the energy crisis and Environmental Pollution

Method used

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  • Preparation method of composite adsorption microspheres of attapulgite cellulose

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]The attapulgite is extruded, sheared, and crushed to obtain a powder with a particle size of 200 mesh. The powder is soaked in dilute hydrochloric acid with a mass fraction of 5% for 8 hours, then washed and precipitated with deionized water repeatedly to neutrality, and 20 g is dispersed in In the mixed solution of 100mL ethanol and water, wherein the volume ratio of ethanol and water is 9:1, then add 5g gamma-(2,3-glycidoxy) propyltrimethoxysilane coupling agent while stirring, at 40 Ultrasonic at 50°C for 50 minutes, then stirred and adsorbed at 50°C for 4 hours, the adsorbed product was separated by suction filtration, washed with 100ml of toluene, absolute ethanol and deionized water to remove excess silane coupling agent, and dried at 110°C to obtain silane Modified attapulgite, ground for later use.

[0030] Add 100 grams of 1-butyl-3-methyl-imidazolium chloride salt and 2 grams of pulp into the flask, and stir at 90° C. at 80 rpm until the cellulose is completely...

Embodiment 2

[0033] The attapulgite is extruded, sheared, and crushed to obtain a powder with a particle size of 200 mesh. The powder is soaked in dilute hydrochloric acid with a mass fraction of 10% for 12 hours, then washed and precipitated with deionized water repeatedly until neutral, and 20 g is dispersed in In a mixed solution of 100mL ethanol and water, wherein the volume ratio of ethanol and water is 9:1, then add 4g of N-2(aminoethyl)3-aminopropyltrimethoxysilane coupling agent while stirring, at 50℃ Ultrasonic for 50min, then stirred and adsorbed at 50°C for 4h, the adsorbed product was separated by suction filtration, washed with 100ml of toluene, absolute ethanol and deionized water to remove excess silane coupling agent, and dried at 110°C to obtain silane-modified Sexual attapulgite, ground for later use.

[0034] Add 100 grams of 1-allyl-3-methylimidazole acetate and 6 grams of absorbent cotton into the flask, and stir at 100° C. at 200 rpm until the cellulose is completely ...

Embodiment 3

[0037] The attapulgite is extruded, sheared, and crushed to obtain a powder with a particle size of 200 mesh. The powder is soaked in dilute hydrochloric acid with a mass fraction of 8% for 10 hours, then washed and precipitated with deionized water repeatedly to neutrality, and 20 g is dispersed in Into a mixed solution of 100mL ethanol and water, wherein the volume ratio of ethanol and water is 9:1, then add 3.3g of vinyltrimethoxysilane coupling agent while stirring, ultrasonicate at 50°C for 50min, then stir and adsorb at 50°C After 4 hours, the adsorption product was separated by suction filtration, washed with 100ml of toluene, absolute ethanol and deionized water to remove excess silane coupling agent, and dried at 110°C to obtain silane-modified attapulgite, which was ground for later use.

[0038] Add 100 grams of 1-allyl-3-methylimidazole acetate and 5 grams of refined cotton into the flask, and stir at 100° C. at 150 rpm until the cellulose is completely dissolved to...

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Abstract

The invention discloses a preparation method of composite adsorption microspheres of attapulgite cellulose. The method comprises the following steps: carrying out preprocessing and surface modification on attapulgite; preparing an ionic liquid cellulose solution; preparing the composite adsorption microspheres of the attapulgite cellulose. A preparation process is simple and convenient, adopted ionic liquid solvent is safe and nontoxic, and the prepared composite microspheres of the attapulgite cellulose are porous, have good dispersibility, biocompatibility and thermostability, have the advantages of high adsorption capability, large adsorption capacity, high removal efficiency and stable property on contaminants in water and can be easily recovered. The problems that the attapulgite is poor in adsorption capability and difficult to recover, a cellulose adsorbent is weak in mechanical strength and low in thermostability and the like are solved, meanwhile, the preparation method has the advantages of wide raw material resources, low cost, no secondary pollution and high practical value since the renewable resources including cellulose and the attapulgite are fully utilized, and can be used for the advanced treatment of contaminants in water, and the problems of energy crisis and environment pollution are solved.

Description

Technical areas: [0001] The invention relates to the field of sewage treatment, and in particular to a preparation method of attapulgite cellulose composite adsorption microspheres. Background technique: [0002] With the rapid development of modern society, environmental pollution caused by industrial wastewater and domestic sewage has seriously damaged the ecological environment. How to economically and efficiently control pollutants in sewage has become one of the urgent tasks for environmental protection and chemical industry. [0003] Attapulgite rods have a unique layered chain crystal structure and nanoscale fibrous crystal morphology, well-developed internal pores, and large specific surface area, which give attapulgite rods strong adsorption and ion exchange properties. It has strong adsorption effect on heavy metal ions in waste water and organic pollutants in water, such as benzene compounds, phenolic compounds, crude oil and petroleum products. In addition, att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/24B01J20/28021C02F1/288
Inventor 苗长林袁振宏庄新姝吕鹏梅王忠铭王琼谭雪松亓伟余强
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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