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Method for preparing active carbon from rice husk

A technology for preparing activated carbon and rice husk, which is applied in the removal of solid waste, etc., and can solve problems such as unstable product quality and low economic benefits

Inactive Publication Date: 2011-03-30
南通新景华企业管理服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There have been many reports on the method of using rice husk to produce activated carbon, but it has not been widely used due to unstable product quality or low economic benefits.

Method used

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Examples

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Embodiment Construction

[0014] (1) Add 11-14 parts of zinc chloride and an appropriate amount of water into the container, stir slowly to dissolve the zinc chloride, and prepare a zinc chloride solution with a concentration of 53-55 degrees Baume and a pH value of 3-3.4 .

[0015] (2) Add 100 parts of rice husks into the chlorine ratio zinc solution, fully mix or knead the rice husks and zinc chloride solution with a kneader, and the mixing time is 15-25 minutes by weight of the rice husks and zinc chloride solution The ratio is 1:5.2-6.8.

[0016] (3) The rice husks that have been mixed are continuously fed from one end of the internal heating rotary furnace with a feeder for carbonization and activation. The high-temperature flue gas is used as the heat carrier, and it is in countercurrent contact with the rice husk to transfer heat directly. Carbonization and activation are carried out in the same rotary kiln. The carbonization temperature is controlled at 280-320 degrees, preferably 300 degree...

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PUM

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Abstract

The invention discloses a method for preparing active carbon from rice husk, which uses rice husk, zinc chloride, diluted hydrochloric acid, sodium hydroxide and water as raw materials and prepares the active carbon by a series of reactions.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon from rice husks. Background technique [0002] Hundreds of millions of tons of rice husks are produced every year due to rice processing. These rice husks are basically used as feed, and some are even directly burned. This not only wastes resources, but also seriously pollutes the environment. Overall, the utilization rate of rice husk is quite low. [0003] Activated carbon is a microcrystalline carbon with special structure and properties. It contains a small amount of hydrogen, oxygen and some other elements, has a large number of pores and a large specific surface area. Therefore, it has a variety of selective adsorption capabilities. It is widely used in unit operations such as decolorization, purification, deodorization, and detoxification in sugar, pharmaceutical, chemical, food, water treatment, and environmental protecti...

Claims

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Application Information

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IPC IPC(8): C01B31/12B09B3/00
Inventor 黄霞黄凌朱
Owner 南通新景华企业管理服务有限公司
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