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Preparation method for jute-based active carbon

A technology of activated carbon and jute, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low adsorption value of hemp activated carbon methylene blue and low activation yield, etc., and achieve important economic and environmental benefits, adsorption Strong ability and decolorization ability, the effect of increasing added value

Inactive Publication Date: 2012-08-15
JIANGSU REDBUD DYEING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem of low methylene blue adsorption value and low activation yield of hemp stalk activated carbon prepared in the prior art, and a preparation method of jute-based activated carbon with high methylene blue adsorption value and high activation yield is provided

Method used

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Experimental program
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Effect test

Embodiment 1

[0024] Weigh 10g jute fiber, wash and dry, immerse it in a beaker containing 0.2L phosphoric acid solution with a concentration of 3mol / L, boil it in a water bath for 5h, then take it out and dry it; put it in an activation furnace, In a nitrogen atmosphere, the activation temperature is 400°C, and the activation time is 1 hour. After cooling to room temperature, take it out, pickling and repeated washing to a pH of 6-7 and then drying to obtain jute-based activated carbon. The active carbon yield is 45.02%, the iodine adsorption value is 878.62 mg / g, and the methylene blue adsorption value is about 299.7 mg / g.

Embodiment 2

[0026] Weigh 10g jute fiber, wash and dry, immerse it in a beaker containing 0.2L phosphoric acid solution with a concentration of 3mol / L, boil it in a water bath for 3h, then take it out and dry it; then put it into a vacuum tube high-temperature sintering furnace , In a nitrogen atmosphere, the activation temperature is 450°C, the activation time is 2 hours, take it out after cooling to room temperature, pickling and repeated washing to a pH of 6-7, and then drying to obtain jute-based activated carbon. The active carbon yield is 41.88%, the iodine adsorption value is 1079.9 mg / g, and the methylene blue adsorption value is about 299.23 mg / g.

Embodiment 3

[0028] Weigh 10g jute fiber, wash and dry it, immerse it in a beaker containing 0.2L phosphoric acid solution with a concentration of 4mol / L, boil it in a water bath for 4h, then take it out and dry it; then put it in a vacuum tube high-temperature sintering furnace , In a nitrogen atmosphere, the activation temperature is 450°C, the activation time is 1 hour, take it out after cooling to room temperature, pickling and repeated washing to a pH of 6-7 and then drying to obtain jute-based activated carbon. The active carbon yield was 43.67%, the iodine adsorption value was 1221.13mg / g, and the methylene blue adsorption value was about 360.14mg / g.

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Abstract

The invention discloses a preparation method for jute-based active carbon, and the method comprises the following steps of: weighing jute fibres or crushed jute stem materials, cleaning and drying, soaking in a beaker filled with a 3-5mol / L phosphoric acid solution, boiling for 3-10 hours in a water bath, adequately penetrating an activating agent into the fibres, then taking out and drying; placing in a vacuum tubular high-temperature sintering furnace, activating to 400-500 DEG C in a nitrogen atmosphere, insulating for 1-3 hours, or placing in a columnar quartz tube, placing in a microwave device, and performing a microwave irradiation reaction with a microwave irradiation power of 100-700 W and an irradiation time of 5-30 minutes in the presence of nitrogen used as protective gas; and cooling to a room temperature, then taking out, acid-washing and repeatedly water-washing until the pH is 6-7, and then drying to obtain the jute-based active carbon. The jute-based active carbon prepared by the method has the advantage of being high in methylene blue adsorption value and activation yield.

Description

technical field [0001] The invention relates to a preparation method of jute-based activated carbon, belonging to the technical field of activated carbon production. Background technique [0002] Activated carbon is a carbonaceous adsorption material with rich pore structure and huge specific surface area. It has the characteristics of strong adsorption capacity, high mechanical strength, good chemical stability, and convenient regeneration. It is widely used in industry, agriculture, transportation, medicine and health. , national defense, environmental protection and other fields. In recent years, with the increasing requirements for environmental protection, the demand for activated carbon at home and abroad has been increasing year by year. [0003] The raw materials for traditional activated carbon preparation are mainly wood and coal. Due to the limited and decreasing domestic forest resources and the high price of coal, it is an urgent problem to be solved in the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 刘国忠张熙明蒋建新刘其霞季涛
Owner JIANGSU REDBUD DYEING TECH CO LTD
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